19 Jan ict and naval glossary
Naval glossary
Abaft the beam
Bearing of an object which bears between the beam and the stern; further astern than the vessel’s middle.
https://officerofthewatch.com/tools/maritime-dictionary/
Abandon
To leave/evacuate a vessel or something similar.
Abandon ship
Evacuation of the ship, leave the ship in an emergency.
Abeam
Bearing of an object which bears 90 degrees from ahead; in a right angle to the ship’s heading; in a line with the middle of a ship.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Able-bodied seaman (AB)
An AB is a rating of the deck department. An AB may work as a watchstander, a day worker, or a combination of these roles. Once a sufficient amount of sea time is acquired, then the AB can apply to take a series of courses/examinations to become certified as an officer. The AB is the next grade above the OS.
Abrasive
Agent used for blast cleaning before coating application.
Abrasive blasting
Cleaning of steel with abrasives propelled by compressed air jet preparatory to painting.
Absolute humidity
The mass of water vapour present in a unit volume of moist air.
Accommodation
Are those spaces used for public spaces, corridors, lavatories, cabins, offices, hospitals, cinemas, game and hobby rooms, barber shops, pantries containing no cooking appliances and similar space.
SOLAS, Consolidated Edition 2014, IMO”
Active-fin stabilisers
Mounted beneath the waterline and emerging laterally from the hull to reduce a ship’s roll due to wind or waves. Active fins are controlled by a gyroscopic control system. When the gyroscope senses the ship roll, it changes the fins’ angle of attack to exert force to counteract the roll. Fins work by producing lift or downforce when the vessel is in motion.
Adrift
Vessel afloat and unattached to the shore or the sea bottom and without propulsive power.
Nathaniel Bowditch: The American Practical Navigator, Bethesda, 2002
Adverse weather
Unfavourable weather conditions.
Aeronautical Rescue Co-ordination Centre (ARCC)
Afloat
A vessel which is water-borne; floating on the water.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Aframax tanker
A tanker with deadweight of 79,999dwt, however the term Aframax is generally used for tankers in the 50,000 – 100,000dwt capacity range.
A-frame
A type of lifting gear often installed on stern of cable vessels, pipe-lying vessels and offshore construction vessels for sub sea load handling; a fabricated steel structural element of a slow speed, two-stroke diesel engine. It stands on the bedplate above the main bearings.
Aft
At, or towards the stern of a vessel (opposite to forward)
Aft peak bulkhead
The first main transverse watertight bulkhead forward of the stern
Aft peak tank
A tank or compartment located abaft the aftmost watertight transverse bulkhead above propeller(s)
And rudder (often used for fresh water or sea water ballast).
https://officerofthewatch.com/tools/maritime-dictionary/
Aft perpendicular (AP)
The aft perpendicular is taken at the aft side of the rudder post; point of reference for calculations and construction.
After body
The ships section aft of amidships.
https://officerofthewatch.com/tools/maritime-dictionary/
Aftermost
Nearest the stern
Aground
A vessel resting or lodged on the botttom of the sea.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Ahead
Forward of the bow
Air Compressor
A machine for increasing pressure of air (often in order to condense it)
Air draught
Vertical distance from the waterline to the highest point of the ship, usually the top of the mast.
https://officerofthewatch.com/tools/maritime-dictionary/
Air Pollution
A substance in the air, that is harmful to humans and the environment.
Aircraft Co-ordinator (ACO)
A person or craft who co-ordinates the involvement of multiple aircraft in SAR operations IAMSAR Manual, Volume 1, IMO, London 1998
Air-fuel ration
The ratio (by weight and volume) between air and fuel
Aldis lamp
A hand-held electrically operated signal lamp
Alert Phase
A situation wherein apprehension exists as to the safety of an aircraft or marine vessel, and of the persons on board IAMSAR Manual, Volume 1, IMO, London 1998
Alfa (A)
International Radiotelephony Spelling Alphabet, meaning: “I have a diver down; keep well clear at slow speed.” Intenational Code of Signals, National Imagery and Mapping Agency, 1969 Edition
Alignment
An arrangement of different structural members in one straight line
All fast (AF)
With this term the mooring manoeuvre is over and the used mooring lines are under tension.
All hands
The entire crew
Alleyway
A vessel’s internal passageway or corridor
All-round light
A light showing an unbroken light over an arc of the horizon of 360°
COLREG
Aloft
Above the uppermost deck; up in the rigging.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Alongside (A/S)
By the side on a ship or pier.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms
Alternator
An alternating current generator.
American Bureau of Shipping (ABS)
One of the major classification societies. A non-governmental organization that establishes and maintains technical standards for the construction and operation of ships and offshore structures.
Amidship (s)
In the line of the keel; sometimes halfway between bow and stern.
Amsterdam-Antwerp-Rotterdam Area (AARA)
Port and Anchorage area for the three big ports Amsterdam, Antwerp and Rotterdam.
Anchor
A heavy steel device (of variable design)
So shaped as to grip the bottom to hold a vessel or offshore installation in a desired position.
https://officerofthewatch.com/tools/maritime-dictionary/
Anchor aweigh
The situation of the anchor at the moment it is broken out of the ground when being weighed..
Anchor ball
Round black shape hoisted in the forepart of a vessel to show that it is anchored.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms
Anchor billboard
A structure on deck, for securing the anchor when it is not in use.
https://officerofthewatch.com/tools/maritime-dictionary/
Anchor buoy
Small buoy secured by a line to the anchor, designed to indicate the position of the anchor on the sea bed.
Anchor cable
Chain or wire connecting a vessel to its anchors.
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Anchor chain
Heavy, linked chain secured to an anchor for mooring or anchoring.
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Anchor Dragging
Moving of an anchor over the sea bottom involuntarily because it is no longer
Preventing the movement of the vessel “
Anchor lights
The riding lights required to be carried by a vessel at anchor.
https://officerofthewatch.com/tools/maritime-dictionary/
Anchor pocket
A recess in the bow plating large enough to accommodate the anchor so that there is no projection outside of shell plating.
Anchor stopper
A device to hold an anchor cable (chain)
So as to prevent the anchor from running out or to relieve the strain at the inboard end.
https://officerofthewatch.com/tools/maritime-dictionary/
Anchor watch
A part of thenavigational watch during anchorage to ensure that the anchor is holding and the vessel is not drifting.
Anchorage
A designated area for waiting ships.
Anemometer
Instrument for measuring wind velocity.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Angle of flooding
Angle of ship’s list at which a not watertight closed opening reaches the water surface.
Angle of list
A steady angle of heel created by forces within the ship. For example, when the ship is inclined due to her asymmetric construction, or by shifting a weight transversely within the ship. The list reduces of ship’s stability. Therefore, it is essential to keep the ship upright at all times by a symmetrical distribution of masses.
Angle of loll
The angle at which a ship with a negative initial metacentric height will lie at rest in still water. So have a neutral equilibrium. An angle of loll can be corrected only by lowering the centre of gravity.
Angle of vanishing stability (AVS)
The point where the GZ curve meets the horizontal axis and the righting lever becomes zero. Any heel beyond this angle will result in negative righting arms. At this point a ship cannot be prevented from capsizing..
Anti-lift bolt
A device, like a cleat, which prevents a hatch cover from lifting up.
Anti-exposure suit
Is a protective suit designed for use by rescue boat crews and marine evacuation.
System parties SOLAS, Consolidated Edition 2014, IMO
Anti-fouling
Is a coating to control or prevent the attachment of unwanted organisms on the ships hull..
Antifouling paint
A paint containing agents for preventing the adhesion and growth of organisms on the hull.
Apparent wind
Combination of the true wind and the headwind caused by the ships forward motion. It is the relative velocity of the wind in relation to the observer.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Apparent Wind Angle (AWA)
Apparent Wind Speed (AWS)
Appendage(s)
Object(s) protruding from the underwater section of a hull beyond ist main outline; e.g. Bilge keels, rudders, stabilising fins.
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Arc of visibility
The sector of the horizon over which a lighted aid tonavigation is visible from seaward.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Arrival Pilot Station (APS)
Time reaching the pilot station.
https://officerofthewatch.com/tools/maritime-dictionary/
Associate Member of the nautical Institute (AMNI)
Astern
In direction of the stern; behind a vessel.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Asymmetrical stern
A special configuration of the afterbody lines used to compensate for the side thrust generated by a propeller and make a more equal water flow into the propeller.
Athwartship
Transverse or across a vessel from side to side; across the vessel at right angles to the ship’s centreline; at right angles to the fore-and-aft direction.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Atlantic Ocean Region-East (AOR-E)
One of the four Ocean Regions that are covered by Inmarsat C satellites.
Atlantic Ocean Region-West (AOR-W)
One of the four Ocean Regions that are covered by Inmarsat C satellites.
Automated Mutual-Assistent Vessel Rescue System (AMVER)
A computer-based global ship-reporting system, operated by US Coast Guard, used worldwide by search and rescue authorities to arrange assistance to persons in distress at sea.
https://officerofthewatch.com/tools/maritime-dictionary/
Automatic identification system (AIS)
An automated tracking system which is used for the exchange of navigational information between AIS-equipped terminals. It transmits static and dynamic vessel information between AIS-receiving stations (onboard, ashore or satellite)..
Automatic radar plotting aid (ARPA)
A marine radar equipped with ARPA is capable of creating tracks using radar contacts. The system can calculate the course, speed, CPA and TCPA of an object. It is an automatic system to help evaluating the radar image..
Auxiliary blowers
On two-stroke diesels, electrically-driven auxiliary blowers are usually provided because the exhaust gas-driven turbo-charger cannot provide enough air at low engine speed. Auxiliary blowers are internal parts of the main engine.
Auxiliary boiler
A boiler which maintains steam pressure when the engine is in standby mode, runs on fuel.
Auxiliary engine
Diesel generators that provide power if the shaft generator is not generating enough. Provides extra power during manoeuvring for bow thruster, etc.
Awareness range
Distance at which a search scanner can first detect something different from its
Surroundings but not yet recognize it IAMSAR Manual, Volume 1, IMO, London 1998″
Awareness stage
A period during which the SAR system becomes aware of an actual or potential incident IAMSAR Manual, Volume 1, IMO, London 1998
Azimuth thruster (AZIPOD)
An azimuth thruster is a configuration of marine propellers placed in pods that can be rotated to any horizontal angle (azimuth), making a rudder unnecessary. These give ships better manoeuvrability than a fixed propeller and rudder system.
Backing Wind
The wind which blows round by changing direction in an anticlockwise manner.
Bailer
Bucket to remove accumulation of water from rescue boats, life rafts and so on.
Bale Capacity
Space available for the stowage of baled cargo in ship’s holds, measured in cubic meter.
Ballast
Water carried instead of or additional to cargo in order to stabilize a vessel (time spent not carrying cargo is time “in ballast”)
Ballast water treatment
Any method to kill, remove or render infertile, harmful or potentially harmful organisms within ballast water.
Ballast water treatment systems (BWTS)
Ballast Water Treatment System is a system designed to remove and destroy/inactive biological organisms (zooplankton, algae, bacteria) from ballast water. Ballast water treatment is still evolving technology.
Bareboat charter
A contract for the hire of a vessel only, without crew, stores, fuel and the like, also: charter by demise
Barge
A flat-bottomed inland cargo vessel, with or without own propulsion, ideal for transporting goods on canals and rivers, also used as bunker barge.
Barometer
An instrument used to measure atmospheric pressure.
Beacon
A lighted or unlighted fixed aid to navigation attached directly to the Earth’s surface.
Beacon Buoy
Seamark with a spar and a light.
Beam
Width of a vessel at the widest point measured at the ship’s nominal waterline; also called breadth.
Bearing
The horizontal angle between the direction of true north or magnetic north and an object. It is given from 000° to 360°.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Bearing to Waypoint (BWT)
Beaufort (Bft)
Is an empirical measurement unit that relates wind speed to observed conditions at sea or on land.
Begin of sea passage (BOSP)
End of the river distance and begin of the sea passage.
Bending moments
Moments causing the ships hull to bend, expressed in tons per meter. They are determined by summing the shearing forces.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Berth
A place for securing a vessel, either in the stream, or alongside a wharf or other vessel.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Bilge
The lowest interior position of a ship.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Bilge keels
Fixed longitudinal plates fitted at the turn of the bilge so that their drag dampens rollamplitudes.Bilge keels are employed in pairs. Bilge keels increase hydrodynamic resistance to rolling, making the ship roll less. Bilge keels are passive stability systems.
Bilge pump
A pump used to remove accumulations of water in the bilge.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Bilge water
Water accumulating in the bilge.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Bilge well
A bilge well is generally located in the lowest part of the compartment. It is used for drainage.
Bill of Lading (B/L)
A document stating that goods have been shipped on board and are to be delivered to a consignee at a port of destination.
Bitt(s)
Pair of heavy posts, set vertically in a deck or on a pier, to which mooring or towing lines are fastened.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Bitter end
Last end of a rope; inboard end of an anchor cable.
Blade
The arm of a propeller or other similar turning mechanism such as an electric fan or turbine.
Blast
A sound of the ship’s siren or whistle.
Blind sector
An area which cannot be scanned by the ship’s radar because it is hidden by parts of its superstructure or shore obstructions, a sector which cannot be seen.
Blizzard
Snow Storm.
“Blower
A device for increasing the amount of air supplied to a cylinder, driven mechanically, electrically or by exhaust gas turbine “
Boarding Arrangements
All equipment, such as pilot ladder, accommodation ladder, hoist, etc. Necessary for safe transfer of the pilot.
Boarding Speed
Mutually agreed speed of a vessel for pilot to embark.
Boat hook
A wooden staff with a metal hook and prod at one end used for fending off or holding on when coming alongside a vessel or a wharf; used to pick up small objects from the water.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Boatswain, bosun (BSN)
The bosun is the highest ranked rating a responsible of supervising the other members of the ship’s deck department. He typically is not a watchstander.
Bold
A piece of metal used with a nut to hold two things together.
Bollard
A strong post on the quay or on ship’s deck for mooring.
Booster Pump
Second pump in line to further increase pressure of a medium.
Bottom Dead Centre (BDC)
The exact bottom of the piston stroke in a reciprocating engine or pump.
Bow
The forward part of a vessel.
Bow thruster
A propeller installed near the bow to provide a transverse thrust to enhance the manoeuvrability..
https://officerofthewatch.com/tools/maritime-dictionary/
Bowline
Type of knot, producing a strong loop of a fixed size.
Brackish Water
Slightly briny or salty water.
Brake horsepower (BHP)
Engine’s horsepower without the loss in power caused by the gearbox, generator, differential. Etc. During testing, the output torque and rotational speed were measured to determine the brake horsepower.
Brash Ice
Floating bits of sea ice or river ice.
Bravo (B)
International Radiotelephony Spelling Alphabet, meaning: “I am taking in or discharging or carrying dangerous goods.
Intenational Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Break bulk (B/B)
Palletised packaged goods that are not containerised. To break bulk is to discharge and distribute cargo.
“Break Bulk Carrier/Vessel
A ship which carries packaged goods, usually manufactured, for individual consignees and has to be loaded and unloaded piece by piece at each port of transfer, formerly referred to as general cargo or piece goods.
Break Down
Failure to function (of an engine).
Bridge
Raised athwartships platform from which a vessel is steered and navigated.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
“Bridge-to-bridge communication
Means safety communications between ships from the position from
Which the ships are normally navigated GMDSS Handbook, IMO, London 2001″
“Broken Stowage
The empty space which is not taken up by the cargo (usually not chargeable and
Therefore useless)
“
Bulbous bow
The very front bulb-like part of a bow below waterline intended to reduce a vessels resistance to motion.
Bulk
Unpacked, free-flowing cargoes, such as coal, ore and grain.
Bulk cargo
Goods that are shipped loose, not in packages or containers.
Bulk Carrier
A single-deck ship designed to carry dry cargoes such as grain or coal in bulk, also: bulker.
Bulkhead
Partition dividing the interior of a vessel into various compartments; Upright wall dividing compartments on board a vessel to increase the safety of a vessel by dividing it into compartments, increasing the transverse strength of a vessel an to reduce the risk of spreading fire.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999; Klaas van Dokkum: Ship Knowledge, 2nd Edition.
Bunkers
Maritime term referring to fuel used aboard the ship. Bunker fuel is technically any type of fuel oil used aboard ships.
Buoy
A floating object of defined shape and color, which is anchored at a given position and serves as an aid to navigation.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms
Buoyancy (B)
Upward force extended by the vertical component of integrated pressure acting on the hull below the waterline; usually calculated as being equal to the weight of the water displaced by the hull.
Klaas van Dokkum: Ship Knowledge, 2nd Edition.
Bureau Veritas
Bureau Veritas S. A. is an international certification agency. It is a non-governmental organization that establishes and maintains technical standards for the construction and operation of ships and offshore structures.
By-law/byelaw
Local rules and regulations, usually national, regional or municipal, or referring to a port authority, company rules and regulations.
Cable length
Measure of length or distance equivalent to 1/10 nautical mile.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Call
A vessel entering a port, usually for a brief period.
Call sign
Merchant vessels are assigned call signs by their national licensing authorities. Used as an unique designation for a station during radio communication.
Calm Sea
Sea like a mirror, Beaufort Scale 0.
Cam
Projecting part of a rotating wheel or shaft.
Camshaft
A shaft which carries various cams required for the operation of inlet, exhaust and fuel valves.
Can Buoy
A cylindrical unlighted buoy used as a channel marker.
Capsize
When a ship lists too far and rolls over, exposing the keel.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Capstan
A large winch with a vertical axis to haul lines, chains, etc. Modern capstans are powered electrically, hydraulically, pneumatically.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Cardinal Mark/Buoy
A pillar-shaped or spar-shaped buoy with different topmarks indicating the North, South, East and West from a fixed point e.g. A wreck, shallow water, banks etc.
Cargo
Commodities or goods to be loaded on board a ship; load; goods and products carried in a vessel.
Cargo boom
Part of gear for loading cargo; crane part on old ships.
Cargo Capacity
The entire capacity available for cargo on board ship.
Cargo Controll Room
A room on board a tanker from which the valves on board the ship may be operated automatically or tank contents monitored remotely.
Cargo door
Watertight door in the shell plating through which cargo may be loaded or discharged..
Cargo hatch
Large opening in the deck; acces to the hold.
Cargo Operation
A manual or mechanical process by which cargo is moved in port.
Cargo ship
Is any ship which is not a passenger ship; definition for ships on which SOLAS applies SOLAS, Consolidated Edition 2014, IMO
Cargo Space
The entire space available for cargo on board ship, e.g. On board Ro-Ro or Con-RO ships is expressed in the length of lanes and is measured in metres.
Cargo Tank
A part of cargo space on board a ship designed for carrying liquid cargo.
Carriage
The whole or any part of the operations and services undertaken by the Carrier in respect of the Goods covered by a Bill of Lading, transport of goods by sea.
Carrier
A vessel or a company engaged in transporting passengers and goods across the sea for a profit.
Cast
To throw or hurl, to heave a line across (e.g. From ship to shore)
Cast Off
To take the line off the bitt or bollard, let go the line.
Cellular vessel
A vessel constructed of a number of prefabricated cells, designed with internal ribbing.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Centre of buoyancy (CB)
Point through which the buoyancy force acts.
Centre of gravity (CG)
The point of equilibrium of the combined weight of a containership and its cargo. The point where the total weight force acts vertically downwards.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Centreline
The longitudinal vertical plane of a vessel.
https://officerofthewatch.com/tools/maritime-dictionary/
Changeover
Complete change from one thing or condition to another (e.g. From one fuel to another)
Charlie (C)
International Radiotelephony Spelling Alphabet, meaning: “Yes/Affirmative.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Charter party
Contract agreement between shipowner and carrier specifying the lease terms for a voyage or hire period.
Charterer
The legal person who has signed a charter party with the owner of a vessel and hires or leases this vessel or a part of the capacity thereof.
Chartroom
A compartment on or near the bridge for handling and stowage of navigational equipment.
Chemical Cargo Carrier
A ship specially designed to carry chemicals in bulk.
Chemical Tanker
A tanker specially designed to carry liquid chemicals in bulk.
Chief
Slang for “Chief Engineer”.
Chief Engineer (C/E)
The head of the engine-room department, first engineer.
Chief mate
Another term for “Chief Officer”.
Chief officer (C/O)
Officer second in command of a ship.
Chief Petty Officer
Bosun.
China classification Society (CCS)
A classification society of ships in the People’s Republic of China to perform classification survey, certification survey and notarial survey of ships including offshore installations, containers and related industrial products both at home and abroad.
https://www.ccs.org.cn/ccswzen/
Clipper
A fast sailing vessel which was used in the past for carrying tea and spices.
Closest point of approach (CPA)
An estimated point in which the distance between two objects, of which at least one is in motion, will reach its minimum value.
Closing Date
A deadline by which the cargo should be on board.
Clutch
A device for connecting and disconnecting two working parts without bringing them to rest.
Coaming
Raised edge of a hatch, hold or skylight to help keep out water
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Coast earth station/Land earth station (CES/LES)
A land station in the Inmarsat satellite communications system which provides.
Interconnection between the satellite and shore systems such as telex and telephone GMDSS Handbook, IMO, London 2001″
Coast Guard (CG)
An organisation engaged by the Government (e.g. Ministry of the Interior, Defence, Transport)
To watch the sea for ships in danger or involved in illegal activities near the coast.
Coaster
A vessel that sails between ports along the coast.
Coastline
The particular shape of the land along the coast, especially as seen from the sea, the air or on a map.
Coil
A rolled up, stowed length of wire, rope or something similar.
Collision
An accident in which a ship that is moving crashes into another ship or object, the act of coming together with sudden, violent force.
Combination Carrier
A bulker designed to carry both dry and liquid bulk cargo.
Combination Tanker
A tanker designed to carry either liquefied petroleum gas or chemicals.
Combustion
A chemical reaction between a fuel and an oxidant producing heat or both heat and light.
Combustion Chamber
The area in which the combustion reaction can be isolated and confined so that it can be easily controlled.
Commence search point (CSP)
Point normally specified by the SMC where a SAR facility is to begin its search pattern.
IAMSAR Manual, Volume 1, IMO, London 1998
Company Security Officer (CSO)
Means the person designated by the Company for ensuring that a ship security assessment is carried out, that a ship security plan is developed, submitted for approval, and thereafter implemented and maintained, and for liaison with port facility security officers and the ship security officer “Guide to Maritime Security and the ISPS Code”, 2012 Edition
Compartment
A separate section or part of a structure; watertight section of a vessel.
Compass
A navigational instrument for determining direction relative to the Earth’s magnetic or geographic poles.
Composite boiler
A firetube boiler which can generate steam by oil firing or the use of diesel engine exhaust gas.
Compound
A chemical that combines two or more elements.
Conclusion stage
A period during a SAR incident when SAR facilities return to their regular.
Location and prepare for another mission.
IAMSAR Manual, Volume 1, IMO, London 1998
Condenser
A chamber where exhaust steam is led to condense into water.
Confined Space
A space that has a limited access, poor or no ventilation, and is not intended for continuous human occupancy, e.g. A ballast tank, a fuel tank.
Confined Waters
Narrow or restricted area of navigable sea.
Conical Buoy
A seamark in a shape of a cone.
Connecting Rod
A rod connecting piston to a crankshaft.
Consignee
A person or company to whom the cargo or other merchandise is sent, a recipient, receiver of the goods.
Container
A large reusable box for solidating smaller cartons and cases into a single shipment, designed for easy and fast loading and unloading of freight.
Container and Ro-Ro vessel (CON-RO)
Vessel designed to carry ISO container, as well as rolling cargo like trucks.
Container Port
A port whose only or mainly traffic is cargo in containers.
Container Vessel
A vessel specially designed for the carriage of containers.
Containerise
To put goods into a container for transport.
Containerised Cargo
Cargo stowed in a container.
Contamination
The presence of unwanted or dangerous substances.
Contract
A formal agreement between two or more people or parties.
Contract Of Affreightment (COA)
An agreement under which a shipowner undertakes to carry quantities of a specific cargo on a particular route or routes over a given period of time (usually under annual agreements) against a set price per ton using ships of his choice with specific restrictions.
Controllable Pitch Propeller (CPP)
Type of propeller with adjustable blades for changing the thrust.
Convoy
A group of vessels which sail together e.g. Through a canal or ice.
Cooler
Heat exchanger for cooling a medium.
Cooling Agent
Chemical component used in the process of cooling.
Co-ordinated search pattern
Multi-unit pattern using vessel(s) and aircraft.
IAMSAR Manual, Volume 1, IMO, London 1998
Co-ordinated Universal Time (UTC)
International term for time at the prime meridian.
Coral Reef
A bank of coral, the top of which can sometimes be seen just above the sea.
Correction Of Charts
Up-dating of sea charts.
Corresponding Speed
Matching speed of e.g. A pilot boat.
Corrosion
Is the oxidation of metal surfaces, they tend to lose electrons to oxygen in the air or in water.
Corrosive
Is a substance that has the power to cause irreversible damage or destroy another substance by contact.
COSPAS-SARSAT Local User Terminal (LUT)
Local terminal on board a vessel to participate in the COSPAS-SARSAT system.
GMDSS Handbook, IMO, London 2001
COSPAS-SARSAT Mission Control Centre (MCC)
Landbased control centre in the COSPAS-SARSAT system.
GMDSS Handbook, IMO, London 2001
COSPAS-SARSAT-System
A satellite system designed to detect distress beacons transmitting on the frequencies 121.5 MHz and 406 MHz
IAMSAR Manual, Volume 1, IMO, London 1998″
Cost And Freight (CFR)
An international trade term (INCOTERMS) indicating that the seller must pay the costs and freight to bring the goods to the port of destination, however, risk is transferred to the buyer once the goods have crossed the ship’s rail.
Cost Efficiency
Being economic by minimising the difference between cost input and a different output.
Cost, Insurance and Freight (CIF)
An international trade term (INCOTERMS) indicating that the seller must pay the costs and freight to bring the goods to the named port of destination, in addition, the seller must procure and pay for insurance for the buyer, the buyer is responsible for the import customs clearance and other costs and risks “
Costal
Situated on the coast or relating to the coast (coastal waters)
Costal warning
Anavigational warning promulgated by a national co-ordinator to cover a region.
GMDSS Handbook, IMO, London 2001
Course
Direction in which a vessel is steered or intended to be steered. Strictly, the term applies to direction through the water, not the direction intended to be made good over the ground.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Course Made Good (CMG)
The course which a vessel makes good over the ground after allowing for the effects of currents, tidal streams and leeway caused by wind and sea.
Course over ground (COG)
True course in which the vessel is moving over the sea floor.
Course-up (C-up)
Display setting; the displayed content is shown course stabilized.
Crack
A break, usually without the separation of parts.
Crane
A device for lifting and moving heavy weights in suspension.
Crank
A lever or bar used to transfer a force to a load and usually to provide a mechanical advantage, e.g. For rotating shaft.
Crank Pin
A short cylindrical pin at the outer end of a crank, held by and moving with a connecting rod.
Crankcase
Part of an engine around the crankshaft.
Crankshaft
A shaft having one or more cranks for transmitting motion.
Critical Speed
Range of revolutions causing a resonance in the engine casing; to be avoided to prevent damage.
Cross Bearing
Fixing the ship’s position by taking bearings of two different objects on shore.
Cross Section
Kind of view on a drawing; something shown in a vertical plane.
Cross Track Error (XTE)
Offset from the planned course/track, perpendicular to the track.
Crosshead
Part of very large diesel engines; converts the vertical movement of the piston into an circular motion by pushing the connection rod of the crankshaft.
Crude oil
Un-refined oil directly from the well.
Crude Oil Tanker
A tanker designed to carry crude oil.
Crude Oil Washing
A system of cleaning tanks with heated crude oil.
Cruise
A pleasure trip by boat or a passenger ship.
Cruise Ship
A passenger ship used for pleasure trips taking passengers on extended cruises calling occasionally at ports having various places of interest.
Current
A large body of water moving in a certain direction.
Cyclone
Tropical storm.
Cylinder Block
The metal casting containing the cylinders and cooling channels or fins of a reciprocating internal-combustion engine.
Cylinder Bore
Width of the interior of a cylinder, measured in centimetres or millimetres.
Cylinder Head/Cover
A casing bolted to the top of the cylinder block, contains valves and injectors.
Damp
To reduce noise level.
Damper
A device for reducing the motion or oscillations of moving parts.
Dangerous Goods/Cargo
Goods listed in the IMDG code, hazardous goods.
Davit
Small cranes on a vessel that are used to hoist and lower boats, especially lifeboats.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Davit launched Liferaft
Liferaft, which are opened and manned while hanging from a davit before it is launched/lowered.
Dead ahead
Bearing of an object directly ahead on the extension of the ship’s fore and aft line.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Dead reckoning (DR)
Calculation of a ship’s position kept by observing a vessel’s course and distance by the log.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Dead ship condition
Is the condition under which the main propulsion plant, boilers and auxiliaries are not in operation due to the absence of power.
SOLAS, Consolidated Edition 2014, IMO
Dead Slow Ahead
Setting of the engine telegraph for as slow as possible movement forward.
Dead Slow Astern
Setting of the engine telegraph for as slow as possible movement backwards.
Deadweight (tons) (DWT)
The weight a ship can load till the maximum allowable immersion. DWT is the sum of the weights of cargo, fuel, fresh water, ballast water, provisions, passengers, and crew.
Deck
The permanent covering over a compartment or hull of a vessel.
Deck Cargo
Cargo and goods carried on deck.
Deck Department
A ship’s department including officers and ratings responsible for navigation and cargo handling operations.
Deck Hand
A seaman whose duties are performed on deck.
Deck Officer
An officer whose responsibilities include navigation and cargo handling.
Declination
The arc of the celestial body measured north or south of the equinoctial.
Delay
Postponing, slowing down.
Delta (D)
International Radiotelephony Spelling Alphabet, meaning: “Keep clear of me; I am maneuvering with difficulty.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Demurrage (DEM)
This are costs, the charterer has to pay, if the laytime in port takes longer, than normally and as it is stated in the charter party.
Density (p)
Density of the water in tonnes/m³.
Departure
Leaving the harbour.
Derelict
An abandoned vessel at sea, still afloat.
Derrick
A lifting device composed of one mast or pole and a boom or jib which is hinged freely at the bottom
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Destination
A place to which somebody or something is going or being sent.
Det Norske Veritas – Germanische Lloyd (DNV, DNVGL)
DNVGL is a classification society emerged due to the consolidation of Det Norske Veritas and Germanische Lloyd. DNV GL is one of the three major companies in the classification society business.
Diesel Generator (D/G)
A device which generates electric current, providing power to units as required.
Differential Global Positioning System (DGPS)
DGPS (Differential GPS) Is essentially a system to provide positional corrections to GPS signals. DGPS uses a fixed, known position to adjust real time GPS signals to eliminate pseudorange errors.
Digital selective call/calling (DSC)
Means a technique using digital codes which enables a radio station to establish contact with, and transfer information to, another station or group of stations, and complying with the relevant recommendations of the International Radio Consultative Committee.
SOLAS, Consolidated Edition 2014, IMO
Dipper
A cuplike container with a long handle for dipping liquids.
Discharge
To unload something.
Discharge Berth
Unloading place at the quay.
Discharge Rate
Amount of cargo unloaded per hour or per day.
Disembark/Disembarkation
Going ashore from the ship.
Dispatch
The money paid to the charterer for loading or discharging the vessel in less time than has been allowed in the charter party.
Displacement (tons)
The weight in tons of the water displaced by a ship. This weight is the same as the total weight of the ship when afloat. Displacement (ton)= water displacement (m3)* density of water(ton/m3).
Displacement hull
A hull designed to travel through the water.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Distance Made Good (DMG)
Distance travelled on a great circle in direction of the destination.
Distance to Waypoint (DTW)
Great circle distance to a waypoint.
Distress
The state of extreme, grave and imminent danger to the ship and crew requiring immediate assistance.
Distress Alert
Means the initial shore-to-ship distress message broadcast in accordance with the Radio Regulations.
GMDSS Handbook, IMO, London 2001
Distress Call
Distress alert sent via radiotelephony, telex or DSC. “MAYDAY” spoken three times, the words this is and the.me or other identification of the vessel in distress spoken three times.
Distress Frequency
Assigent frequency for distress purpose only band allocated for distress calls and distress traffic.
Distress Message
A message from the vessel in distress following standard format and giving the following information: distress signal, identification of the vessel in distress, its position, the nature of the distress, the type of assistance required and any other information which might facilitate rescue, such as the number of persons injured.
Distress Phase
A situation wherein there is reasonable certainty that a vessel or other craft, including an aircraft or a person, is threatened by grave and imminent danger and requires immediate assistance.
IAMSAR Manual, Volume 1, IMO, London 1998″
Distress Signal
An internationally recognized signal sent out by a ship or plane in danger for the purpose of summoning help such as a radio code MAYDAY or SOS, a flare or a flag.
Ditching
The forced landing of an aircraft on water.
IAMSAR Manual, Volume 1, IMO, London 1998
Dock
Is a bassin that can be flooded to allow ships to run into and can be drained to get the ship on a dry platform. They are used for the construction, maintenance, and repair of ships.
Dockyard
Shipyard,.val dock.
Dolphin
Structure consisting of a number of piles driven into the seabed; used for mooring purposes.
Double Bottom
Space between the inner and outer bottom plating of hull, the double bottom of a ship is divided into a number of tanks for storing fresh and ballast water and fuel oil.
Double Hull Ship
A ship constructed with a inner and outer hull.
Downstream
In the direction a river or stream is flowing.
Downwind
In the same direction in which the wind blows.
Draft marks
Numbers marked on the hull side forward, aft and amidships on large vessels, indicating the draft.
https://officerofthewatch.com/tools/maritime-dictionary/
Draft survey
A calculation of the weight of cargo loaded or discharges to or from a ship by measurents of changes in its displacement, performed by reading the ship’s draft on the draft markings at six standard points on the hull: forward, midships and aft on both port and starboard sides.
Draft, draught (d)
Vertical distance between the waterline and the bottom of the hull.
Drag
To pull along the ground.
Drag on the hull
The force of the water that creates resistance to the ship.
Dragging of an Anchor
Pulling an anchor over the sea bottom involuntarily because it is no longer preventing the movement of a ship.
Dragnet
A heavy net pulled along the sea bottom when searching for something.
Drain
Removing a liquid from something by letting it flow away or out.
Dredge
To deepen e.g. A channel.
Dredge Up
To remove unwanted things from the bottom of a river, lake, etc. Using a sucking or other device.
Dredger
A vessel used for deepening a channel or area, hopper.
Drift
The movement of a search object caused by environmental forces.
Drizzle
Slight gentle and steady rain.
Drop Anchor
Let go the anchor.
Drop Line
A pipeline which leads vertically from a deck line to a tank line.
Drowning
Dying under water of suffocation.
Drum
A cylindrical or rounded container e.g. For hot water, steam or gas.
Dry Cargo
Cargo stowed in bulk consisting of ores, grain, coal, coke etc.
Dry Dock
A structure on shore able to receive a ship and to be drained so as to leave the ship free of water with all parts of the hull accessible for repairs, painting.
Dry-Bulk Carrier
A ship designed for the carriage of dry solids (ores, coal, etc.) in bulk, without packaging.
Dual Purpose Officer
An officer having qualifications for work both on deck and in the engine room.
Ducting
A tube, a leading, a canal through which some liquid or gas moves.
Dumping
An act of getting rid of something unwanted, esp. By leaving it in a place where it is not allowed to be.
Dust
Powdery sand.
Earthing
An act done to prevent static electricity discharge when connecting or disconnecting cargo hoses.
Earthing cable
A cable used to earth an object.
Ease a line
To slacken a rope, to lessen the hold upon the line.
Ebb Tide
The reflux of the tide, the flowing back of the tide as the water returns to the sea.
Echo (E)
International Radiotelephony Spelling Alphabet, meaning: “I am altering my course to starboard.
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Echo Sounder
An instrument for determining depth of water or locating objects at certain depth.
Echo sounding
Measuring the depth of the water using a sonar device.
Efficient Deck Hand (EDH)
A senior rating or seaman.
Electronic Bearing Line (EBL)
Navigational aid on Radar or ECDIS displays; virtual line to take bearings.
Electronic Chart Display and Information System (ECDIS)
A geographic information system used for nauticalnavigation. If it complies with the IMO regulation it can be used as an alternative to paper nautical charts. The ECDIS system displays the information from Electronic Navigational Charts (ENC) Or Digital Nautical Charts (DNC) and integrates position information from position, heading and speed through water reference systems and optionally other navigational sensors.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms#M
Electronic Chart System (ECS)
Electronic chart system, not to be used for primary navigation.
Embark/Embarkation
To come on board the vessel (referring to passengers, crew and the pilot).
Embarkation ladder
Is the ladder provided at survival craft embarkation stations to permit safe access to survival craft after launching.
SOLAS, Consolidated Edition 2014, IMO
Emergency
A state of sudden and unexpected danger requiring immediate action.
Emergency Alarm
A device for giving a warning in the event of danger to the ship.
Emergency Anchorage
Area to be used for anchoring in case of unexpected events.
Emergency Escape Breathing Device (EEBD)
Is a life saving appliance used for quick escaping an area with hazardous conditions such as fire, smoke, poisonous gases etc. And it is a self-contained compressed air apparatus. The EEBD is NOT a fire fighting equipment and is in place ONLY to assist the individual in vacating his immediate surroundings.
Emergency Exit
Emergency way out in case the normal exit is blocked.
Emergency Fire Pump
Additional fire pump in an special compartment, to be used in case of failing main fire pumps.
Emergency Fire Pump Compartment
A room where the emergency fire pump is located.
Emergency Full Speed
Maximum power of an engine which can be used for a short time.
Emergency Plan
A plan in the event of a serious or dangerous accident, which happens suddenly or unexpectedly and needs immediate action, providing information on items such as escape routes and safety equipment.
Emergency Position Indicating Radio Beacon (EPIRB)
Batterie powered radio beacon operation as part of the COSPAS-SARSAT system to indicate a distress situation; Device operating on 406mhz; a position is sent with the distress message.
Emergency Shutdown
A button or a switch to be used in case of sudden necessity to stop e.g. A cargo operation, a pump, a generator, the main engine etc.
Emergency Signal
Alarm signal used in dangerous situations.
Emergency Steering Gear
Steering gear used in case of main steering breakdown.
Emergency Switchboard (ESB)
Is a switchboard which in the event of failure of the main electrical power supply system is directly supplied by the emergency source of electrical power or the transitional source of emergency power and is intended to distribute electrical energy to the emergency services.
SOLAS, Consolidated Edition 2014, IMO
Emergency Tiller
A lever fitted to the rudder (manual steering) used in an emergency; overriding tiller on the bridge to move the rudder.
Emergency Towing-Off Wire
A wire needed in the event of fire or other emergency and used by a tug to move the ship away from the berth.
Emission
An act or event during which gas, heat, light, etc. Is sent out.
Emission control areas (ECA)
Special zones for shipping established by the IMO. These zones are subject to specific environmental regulations on emissions and waste/industrial water disposal. Since 1 January 2015, ships under the MARPOL Annex VI may only emit emissions of 0.1% sulfur in such protected areas.
International Convention for the Prevention of Pollution from Ships (MARPOL)
End of sea passage (EOSP)
End of the sea passage and begin of the river distance.
Engine Performance
Engine operation and functioning with regard to effectiveness.
Engine Room (ER)
Compartment containing the propulsion machinery of a vessel.
English Channel
The area of sea which separates England from France.
Enhanced group call (EGC)
The system for broadcasting messages via the mobile satellite communications system operated by Inmarsat.
GMDSS Handbook, IMO, London 2001
Ensign
The flag declaring a ship’s country of registry.
Entrance Channel
A port canal leading to the port.
Entry
Recording something in the log-book or in the register.
Estimated Time of Arrival (ETA)
Calculated time of arrival at a specific position.
Estimated Time Of Berthing (ETB)
Calculated time of berthing.
Estimated Time of Completion (ETC)
The estimated time when cargo operations are finished.
Estimated Time of Departure (ETD)
Expected time of departure.
Estimated Time of Sailing (ETS)
Another term for estimated time of departure.
Even Keel
Bow and stern of the ship on the same level/depth, no trim.
Exhaust Gas
The waste gas from an engine.
Exhaust Gas Boiler
Is a type of heat recovering system on ships which allows the exhaust heat of the main engine to produce steam while going out in the atmosphere.
Extinguish
To put out e.g. A fire.
Extinguisher
A device for putting out fires, usually portable.
Extremely High Frequency (EHF)
Any frequency between 30–300 Gigahertz.
Failure
Breakdown in operation of mechanism, a default.
Fairlead
Fittings or holes inside the bulwark to guide mooring lines, towing lines; fittings or devices used in preserving the direction of line, chain or wire so that it is may be delivered fairly, or on a straight lead, to the sheave, drum, whinch or so on.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Fairway
Navigable part of a waterway.
Fairway Speed
Mandatory speed in the fairway.
Fan
A ventilator.
Fast rescue craft (FRC)
Is a relatively small rescue vessel generally designed for search and rescue (SAR) duties.
https://habbeke.nl/project/fast-rescue-craft-frc903/
Fathom
Unit of length equal to 6 feet (1.8 m), roughly measured as the distance between a man’s outstretched hands. This is particularly used to measure depth.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Fatigue
Physical and mental exhaustion due to sleep deprivation, stress, hard work, loneliness, etc.
Feed Water
The water that is supplied to the boiler and is converted into steam.
Feeder service
A service provided by feeder vessels to carry the small volume cargo local ports to the main hubs.
Feeder vessel
A small vessel which transfers cargo between a central hub port and smaller ports.
Fender
A rubber consisting, air or foam filled bumper used to prevent damage while lying alongside.
Ferry
A vessel for transporting passengers and vehicles across a river, channels or other body of water.
Fetch
The distance across water which the wind travels. The longer the fetch and the faster the wind speed, the more wind energy is imparted to the water surface and the larger the resulting sea state will be.
Ralf Brauner: Wetter auf See, DSV-Verlag. Bielefeld 2019
Fin
Horizontal, often adjustable wing appended to the underwater part of the hull for damping the roll of a surface vessel to stabilize it.
Fire Alarm
A device for giving a warning in the event of fire.
Fire Control Plan
Compulsory drawing of a ship, showing all safety equipment and safety related construction.
Fire Extinguisher
A portable container usually filled with special chemicals (e.g. Foam, powder, CO2) for putting out a fire.
Fire Fighting Equipment (FFE)
Equipment to be used by a firefighter in event of fire.
Fire Hose
A special heavy-duty hose for use in extinguishing fires.
Fire Monitor
Fixed installed nozzle to fight fires.
Fire Prevention
Practice of measures and regulations preventing the outbreak of fire.
Fire Watch
An inspection of the vessel by a crew member going around at certain intervals to prevent and detect any fires on board mandatory in vessels carrying more than 36 passengers.
First Aid
Emergency treatment given before regular medical services arrive.
Fishing vessel
Is a vessel used for catching fish, whales, seals, walrus or other living resources of the sea.
SOLAS, Consolidated Edition 2014, IMO
Fixed Pitch Propeller (FPP)
Type of propeller with fixed blades.
Flag of convenience (FOC)
A ship is said to be flying a flag of convenience if it is registered in a foreign country for purposes of reducing operating costs.
Flag of convenience register (FOC)
A national register offering registration to a merchant ship not owned in the flag state.
Flag State
The nation in which a vessel is registered, and which holds legal jurisdiction as regards operation of the vessel, at home or abroad.
https://officerofthewatch.com/tools/maritime-dictionary/
Flame
Light rising from a fire.
Flame Trap
A perforated metal cover over an opening or vent to prevent the passage of flame.
Flammable
Likely to burn easily and quickly.
Flange
A radially projecting collar or rim on an object (e.g. A pipe) for locating or strengthening it for attaching it to a object.
Flash
A sudden burst of flame, light or heat.
Flashing light
A light flashing at regular intervals at a frequency of 120 flashes or more per minute COLREG
Flashpoint (FP)
Is the temperature in degrees Celsius (closed cup test) at which a product will give off enough flammable vapour to be ignited, as determined by an approved flashpoint apparatus.
SOLAS, Consolidated Edition 2014, IMO
Flatrack
A container without sides and frame members at the front and rear. The container can be loaded from the sides and top and are designed for load of OOG cargo. Two or more flat racks can be connected.
Hapag-Lloyd AG: Container Specifications.
Fleet
All ships (both naval and commercial) of a company.
Fleetnet
A commercial service for the broadcasting and automatic reception of fleet management and general public information by means of direct printing through Inmarsat’s EGC system.
GMDSS Handbook, IMO, London 2001
Float on – Float off
System of cargo operations with floating cargo.
Float-free launching
Is that method of launching a survival craft whereby the craft is automatically released from a sinking ship and is ready for use.
SOLAS, Consolidated Edition 2014, IMO
Floating production, storage and offloading vessel (FPSO)
Offshore production facilities that house both, processing equipment and storage for produced hydrocarbons.
https://www.rigzone.com/training/insight.asp?Insight_id=299&c_id=
Flooding
Major uncontrolled flow or penetration of seawater into the vessel.
Fly a Flag
To sail under the national flag of a country.
Flywheel
A heavy wheel attached to the crankshaft, it stores up the energy during the power event and releases it during the remaining events of the operating cycle.
Foam
Chemically produced substance that smothers the flames on a burning liquid.
Foam Extinguisher
A portable container filled with special chemicals for putting out a fire.
Foam Monitor
Fixed installed nozzel for fighting fire with foam.
Fog
A cloudlike mass of water droplets or ice crystals near the surface of the earth, which reduces visibility, visibility less than 1000 m.
Fog Bank/Patch
A stratum or layer of fog as seen from a distance.
Foggy
Thick with fog.
Foghorn
A deep, loud horn for sounding warning to ships in foggy weather.
Foil (Hydrofoil)
Is a construction like a wing under water used to lift the hull until it is totally outside the water.
Foot (ft)
Measurement of 12 inches.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Forecastle
The upper deck forward of the foremast and included in the bow area; forward mooring station on which the windlass is installed.
Forepeak
The extreme forward part of the interior of the hull, space between the collison bulkhead and the stem plating.
Forward (FWD)
Towards the bow or front of a vessel.
Forty-foot equivalent unit (FEU)
Unit of measurement equivalent to one forty-foot container. Two twenty-foot containers (teus) equal on FEU.
Forward Breast Line
A line led from the front part of the ship in a more or less right angle to a bollard on the quay to prevent the bow from moving away from the pier.
Forward Draught/Draft
The draught of the vessel at the forward draft mark.
Forward perpendicular (FP)
The forward perpendicular is drawn perpendicularly to the summer load line through the intersection of the fore side of the stem with the load waterline.
Forward Spring
A line led from the forward part of the ship to a bollard on the quay to prevent the vessel from moving ahead.
Foul Anchor
Anchor which has its own cable twisted around it or has fouled an obstruction.
Foxtrot (F)
International Radiotelephony Spelling Alphabet, meaning: “I am disabled; communicate with me.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Frame
A transverse structural member which gives the hull strength and shape https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms
Freeboard
Distance from the waterline to the top of the main deck, measured amidships; defined according to the ICLL.
Free-fall launching
Is that method of launching a survival craft whereby the craft with its complement of persons and equipment on board is released and allowed to fall into the sea without any restraining apparatus.
SOLAS, Consolidated Edition 2014, IMO
Freezing Drizzle
Slight freezing rain.
Freezing Point
The temperature at which a liquid freezes, e.g. The freezing point of water is 0 degrees C or 32 degrees F.
Freezing Rain
Rain which changes from liquid state into ice on cold surfaces.
Fresh water (FW)
Water without any salt content and a density of 1,000t/m3.
Fresh Water Allowance (FWA)
Increase in draught when a vessel is travelling in fresh water due to change of density, thus change of buoyancy.
Fresh water arrival draft (FWAD)
It is the vessels draft on arrival in fresh water.
Fresh water departure draft (FWDD)
It is the vessels draft on departure in fresh water.
Fresh Water Generator
A device which distills freshwater from seawater.
Frostbite
Injury which is caused by the freezing of the skin tissue or body part.
Frozen Cargo
Refrigerated cargo carried at lower temperatures.
Fruit Carrier
A vessel for the carriage of fruit.
Fuel
Combustible matter such as diesel oil, fuel oil, coal or gas burnt to produce heat or power.
Fuel Consumption
The amount of fuel used per certain units (e.g. Per nautical mile, per hour, per day etc.)
Fuel Efficiency
Being economic by minimising the difference between fuel input and movement output.
Fuel Injector
Nozzle injecting fuel into the combustion chamber.
Fuel Monitoring
To watch and check the consumption of fuel.
Fuel Oil
A fraction obtained from petroleum distillation, either as a distillate or a residue, and used in an engine for the generation of power.
Fuel Oil Sludge
Part of the remaining particulars and water after fuel purification.
Fuel Tank
Is a hold on a ships, where the fuel for the engines is stored.
Fuel Valve
A valve controlling the injection of fuel.
Fuel-Driven
Propelled by using fuel.
Full Ahead
A standard engine order indicating that the engine should operate using the maximum revolutions forward.
Full Astern
A standard engine order indicating that the engine should operate using the maximum revolutions astern.
Full Speed
Highest possible speed of a vessel.
Fume
Unpleasant, harmful and toxic gas or smoke emitted from exhaust pipes, produced by fires, chemicals, fuel etc.
Gale
A very strong wind of 32–63 mph (14–28 m/sec)
Gale Warning
A national Weather Service warning of sustained winds having speed in the range of 34–47 knots.
Galley
The ships kitchen.
Gallon
A unit for measuring volume.
Gangway
Is a passage way to access a ship.
Gantry Crane
A crane having a hoist fitted in a trolley for parallel movement.
Garbage
Waste material, rubbish or unwanted things that are thrown away.
Gas
Substance having perfect molecular mobility and the property of indefinite expansion as opposed to a solid or a liquid.
Gas Tanker
A tanker designed to carry gas.
Gear
A section of a shaft having cut teeth of such form, size and spacing that they mesh with teeth in another part to transmit or receive force and motion.
General average
General average is a principle of maritime law whereby all stakeholders in a sea venture proportionally share any losses resulting from a voluntary sacrifice of part of the ship or cargo to save the whole in an emergency.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms
General Cargo
Cargo packed into boxes, cases, crates, drums or any other kind of packing not in containers/
General Cargo Carrier
A vessel designed to carry general cargo.
General purpose container
A container used for the carriage of general cargo without any special requirements for the transport and or the conditioning of the goods (a Standard container).
Hapag-Lloyd AG: Container Specifications.
General radiocommunications
Means operational and public correspondence traffic, other than distress, urgency and safety messages, conducted by radio.
GMDSS Handbook, IMO, London 2001
Generator
A machine for converting mechanical power into electricity.
Give-Way Vessel
Vessel, which has to manoeuvre to prevent a collision.
Global
Relating to or affecting the whole world.
Global Maritime Distress and Safety System (GMDSS)
Is an internationally agreed-upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and aircraft.
Goggles
Glasses worn at work to protect eyes.
Golf (G)
International Radiotelephony Spelling Alphabet, meaning: “”I require a pilot.””
When made by fishing vessels operating in close proximity on the fishing grounds it means: “”I am hauling nets.””
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition”
Good Visibility
From 5 to 11 nautical miles (7 visibility scale).
Goods
Commodities, cargoes.
Grab
A mechanical device for gripping and lifting cargo.
Grab Crane
A crane fitted with a device for gripping and lifting cargo.
Grain
A small, hard seed such as wheat, corn, rye, rice or millet.
Grain Capacity
Total capacity of the hold available for cargo such as grain with an allowance for the volume occupied by frames and beams measured in cubic metres or cubic feet.
Grating
A fixed frame of bars covering an opening to allow air to pass underneath.
Green Awareness
Being conscious about the environment.
Green Water
Water reaching the deck of a ship without flying through the air as spray.
Groove
A long,.rrow cut in a surface.
Gross Tonnage (GT)
Nondimensional number calculated to show the size of a vessel.
Gross Weight
Total weight without deductions for tare or waste.
Grounding
Event of running aground while underway.
Gunwale
The uppermost continuous strake in a vessel’s side; the upper edge of a vessels hull.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Gust Of Wind
A temporary increase in wind speed.
Gyro Compass
An automatic compass with one or more gyroscopes which point to true North.
Hague Rules
The provisions of the International Convention for the Unification of Certain Rules relating to Bills of Lading.
Half Ahead
A standard engine order indicating that the engine should operate at half speed forward.
Half Astern
A standard engine order indicating that the engine should operate at half speed astern.
Handling
Manual or mechanical process by which cargo is moved, carried or transported.
Hand-Operated Valve
A valve in a cargo line which can be opened and closed manually.
Handymax
Vessel size (small-sized ships with a size less than 60,000 DWT)
Handysize
Vessel size (small-sized ships with a capacity ranging between 15,000 and 35,000 DWT)
Harbour
Port, haven.
Harbour Master
An official who supervises operations in a port area (primarily regarding safety of
Navigation and for keeping records and control of ship’s and seafarers certificates) and administers its rules.
Harbourmaster’s office
The headquarters of the harbourmaster’s service.
Hard top container
A closed container fitted with a roof that can be opened or lifted off Hapag-Lloyd AG: Container Specifications.
Hard-a-port!
A standard wheel order to put the rudder fully over to port.
Hard-a-starboard!
A standard wheel order to put the rudder fully over to starboard.
Hatch
Opening in the deck giving acces to cargo holds or stores.
Hatch Coaming
Sidewall of a hatch projecting above the deck around the perimeter of the hatch to prevent water from going below.
https://officerofthewatch.com/tools/maritime-dictionary/
Hatch Cover
Device for closing a hatch.
Hatch Ladder
A ladder for climbing down the hatch to the tweendeck or hold.
Haul In
To pull a line or chain (e.g. Back on the forecastle), heave in.
Haven
A safe place for boats, an old.me for a harbour or a port.
Hawse
Part of a bow where hawseholes for the anchor cable are located.
Hawse Pipe
Tube from the forecastle through the hull where the anchor chain is leading through.
Hazard
A danger.
Hazardous
Dangerous, esp. To the health or safety of human beings.
Hazardous Cargo
Cargo which may cause harm to humans, animals or the environment.
Hazardous Material (hazmat)
Term which refers to dangerous goods.
Head of navigation
A term used to describe the farthest point above the mouth of a river that can be navigated by ships.
Heading (HDG)
Direction in which the bow points.
Head-up (H-up)
Orientation of the radar or ECDIS display; the depiction is stabilized to the heading of the vessel.
Heat Exchanger
A device used either as a heater or a cooler, or both, in internal combustion engines used primarily for cooling: thus commonly called coolers.
Heave
To raise or lift with effort.
Heave Away
An order to pull on the line around the capstan or winch drum.
Heave In
To start pulling a line which is slack, remove the slack of the line or chain.
Heave On
To tighten the line.
Heave To
A manoeuvre or slowing down and turning the ship’s head in extremely heavy weather to reduce stress and strain on the ship’s hull.
Heaving
A movement where the whole ship rises bodily and then sinks into the trough of a wave.
Heaving Line
A small line thrown to an approaching vessel, or a dock as a messenger.
https://officerofthewatch.com/tools/maritime-dictionary/
Heavy fuel oil (HFO)
A fraction obtained from petroleum distillation, either as a distillate or a residue. The term fuel oil is used to refer only to the heaviest commercial fuel that can be obtained from crude oil.
www.marquard-bahls.com/de/news-info/glossar
Heavy lift
Unusually heavy and/or out-sized cargoes
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Heavy lift vessel
An item specifically designed to be self-sustaining with heavy lift cranes, to handle unusually heavy and/or out-sized cargoes.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Heel
To lean to one side, to list or incline to one side as a result e.g. Of wind pressure.
Heeling
Listing of the vessel.
Heeling angle (θ)
The Angle in degrees of the heeling or list of the vessel.
Helideck
Is a purpose-built helicopter landing area located on a ship including all structure, fire-fighting appliances and other equipment necessary for the safe operation of helicopters.
SOLAS, Consolidated Edition 2014, IMO
Helm
A wheel installed on the bridge of the ship to turn the rudder.
Helm Switch
A switch to change the steering mode.
Helmsman
A person who steers the ship, wheelsman, quartermaster.
High Pressure
Having the pressure above normal.
High Sea
Open (international) waters of an ocean or a sea not included in the territorial waters of any country.
High Speed Craft (HSC)
A vessel with engines of high rotational speed, usually ferries making 30–40 knots.
High sulphur fuel oil (HSFO)
Heavy fuel oil with a sulfure content < 3,5% normaly IFO which was desulphurized.
www.marquard-bahls.com/de/news-info/glossar
High Tide
The tide at its highest level, the time of high water.
Hinged
Equipped with joints that enable swinging, as e.g. A rudder or door.
Hire
To engage the services for the temporary use of a vessel for the set freight or the price paid for the temporary use of a vessel and her space in the holds.
Hitch
A knot used to tie a rope or line to a fixed object.
Hog
To bend, to arch in a center.
Hogging
Hogging is the stress a ship’s hull or keel experiences that causes the center or the keel to bend upward.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Hoist
Raise or lift by mechanical appliances, e.g. A flag.
Hold
A compartment on board ship where the cargo is stowed.
Home port
The port of registration of a vessel.
Hook
Curved piece of metal for catching and pulling something or for suspending something.
Hopper Tank
An enclosed space formed as a permanent structure in ships body, self-unloading, for storing ballast water.
Horizontal
Parallel to the plane of the horizon, not vertical.
Horse Power (HP)
A unit of power equivalent to 745,7 watts.
Hose
A flexible tube for conveying water, oil or other liquid substances.
Hot work permit (HWP)
This permit allows crewmembers, mentioned in the permit, to do hot works like welding in areas, where it is restricted without permit.
Hotel (H)
International Radiotelephony Spelling Alphabet, meaning: “I have a pilot on board.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Huddle Position
Position in which a group of people in water crowd together as close to each other as possible.
Hull
Framework of a vessel, including all decks, bulkheads and side plating, but exclusive of masts, riggings and all equipment.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Humid
Damp, moist, containing a high amount of water or water vapour.
Humidity
Dampness.
Hurricane
Violent storm with extremely strong winds (of more than 63 knots)
Which have a Circular movement (Beaufort 12)
Hydrant
An upright pipe with a spout, nozzle or other outlet for drawing water from the main pipe in the street or ship for fighting fires.
Hydrocarbon
A chemical combination of hydrogen and carbon, such as in oil or petrol.
Hydrographic Survey
Measurement, description and mapping of the surface waters of the earth eith special reference to their use for navigation “
Hydrolysate
A product of a chemical reaction during which a substance is separated into simpler components by coming into contact with water.
Hydrostatic release unit (HRU)
Is a pressure activated mechanism designed, to automatically deploy a life raft. At up to 4m water pressure the release mechanism is activated and the liferaft is free to float clear to the surface.
Hypothermia
Subnormal body temperature resulting from long exposure to cold.
IALA Maritime Buoyage System
System of lateral and cardinal bouys defined by the IALA.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
IALA Region A
In IALA Region A the lateral marks on the starboard side of the channel are coloured green and should be passed on the starboard side of the vessel, those on the port side of the channel should be passed on the port side of the vessel.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
IALA Region B
In IALA Region B the lateral marks on the starboard side of a channel are coloured red and on the port side are coloured green.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
Ice
A solid form of water produced by freezing.
Ice Anchor
A large hooklike device for setting in ice to anchor a vessel or to provide a hold for hawser in warping it along ice drag.
Ice Belt
Elongated ice field.
Ice Pellet
Piece of sleet in a form of small, translucent ice ball.
Iceberg
An ice mountain, mass of fresh water ice floating on water.
Icebreaker
Ship specially constructed for breaking navigable passages through ice.
Ice-field
A large sweet of floating ice, longer than an ice floe.
Icing
A coating of ice on solid objects, e.g. The mast or superstructure of a ship.
Ignition
The process that ignites the fuel in the cylinder of an internal combustion engine, the act of starting to burn or making something (e.g. Oil) explode or burn.
Ignite
To cause to start combustion.
Immersion suit
Is a protective suit which reduces the body heat loss of a person wearing it in cold water.
SOLAS, Consolidated Edition 2014, IMO
Impact
Shock, the force of the collision.
Impeller
A device that spins e.g. Inside of a centrifugal pump, in order to develop centrifugal force.
In Ballast
Without cargo, only with balast water on board.
In water survey
A method of surveying the underwater parts of a ship while it is still afloat instead of having to drydock it for examination of these areas, as was conventionally done.
Inbound
Inward bound, e.g. Inbound ships, ships sailing into the port, channel or fairway.
Inches (in)
Unit of length (25.4mm)
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Incident
Unforeseen and unexpected event which may have the potential to become an accident, but in which injury to personnel and/or damage to ship remains minor.
Increase
To (make something) become larger or bigger.
Indemnify
To compensate for damage or loss sustained, expense incurred.
India (I)
International Radiotelephony Spelling Alphabet, meaning:.I am altering my course to port.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Indian Ocean Region (IOR)
One of the four Ocean Regions that are covered by Inmarsat C.
Inert Gas
Gas which not allowes a fire to ignite; gas which displaces oxygen.
Inflammable
Flammable, capable to be set on fire easily, combustible.
Inflatable appliance
Is an appliance which depends upon non-rigid, gas-filled chambers for buoyancy and which is normally kept uninflated until ready for use.
SOLAS, Consolidated Edition 2014, IMO
Inflated appliance
Is an appliance which depends upon non-rigid, gas-filled chambers for buoyancy and which is kept inflated and ready for use at all times.
SOLAS, Consolidated Edition 2014, IMO
Inmarsat-A
A satellite communications system for transmission of voice, telex, facsimile or data using directional antennas in the Inmarsat satellite system.
GMDSS Handbook, IMO, London 2001
Inmarsat-C
Satellite communications system for telex or data messaging using small terminals and.
Omnidirectional antennas in the Inmarsat satellite system.
GMDSS Handbook, IMO, London 2001″
Inoperative
Not functioning.
Inshore navigation
Coastal traffic, navigation along the coast.
Inshore Traffic Zone (ITZ)
A designated area between the landward boundary of a Traffic Separation Scheme and the adjacent coast.
Insulate
To cover something with a material or substance in order to stop heat, sound or electricity from escaping or entering.
Insurance
A system of insuring property or life against damage or loss.
Intermediate fuel oil (IFO)
A blend of gasoil and heavy fuel oil with a higher content of heavy fuel oil.
www.marquard-bahls.com/de/news-info/glossar
Internal Phone
A device used for communicating on board ship.
International Association of Classification Societies (IACS)
An organisation in which the major classification societies, among others American Bureau of Shipping, Lloyd’s Register of Shipping and Germanischer Lloyd, are joined, whose principal aim is the improvement of standards concerning safety at sea.
International Labour Organization (ILO)
UN’s labour organization (Geneva)
International Life-Saving Appliance Code (LSA Code)
Adopted by the Maritime Safety Committee of the IMO.
International Maritime Code for Dangerous Goods (IMDG-Code)
International guideline to the safe transportation or shipment of dangerous goods or hazardous materials by water on vessel,published by the IMO.
International Maritime Organization (IMO)
UN’s maritime authority (London)
International Organisation for Standardisation (ISO)
An international standard-setting body composed of representatives from various national standards organisations. Founded on 23rd February 1947, the organisation promulgates worldwide proprietary industrial and commercial standards.
International Safety Management Code (ISM Code)
Means the International Management Code for Safety Operation of Ships and for Pollution Prevention required to be carried by all SOLAS ships.
Guide to Maritime Security and the ISPS Code, 2012 Edition
International Ship an Port Facility Security Code (ISPS Code)
Means the International Code for Security of Ships and of Port Facilities.
Guide to Maritime Security and the ISPS Code, 2012 Edition
International voyage
Means a voyage from a country to which the present Convention applies to a port outside such country, or conversely.
SOLAS, Consolidated Edition 2014, IMO
Interval
A period of time between two points of time or events.
Investigation
Examination (usually in case of accidents, for court purposes), study.
Inward/Inbound Vessel
A ship going to or entering the port.
Isolated danger marks
Isolated danger marks are used to indicate a single hazard, such as a wreck, which has.vigable water all around it. Vessels should keep well clear of the mark on all sides. They are coloured black with red bands and have two black balls above each other on the top of the mark.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
Jetty
A mole or breakwater, running out into the sea to protect harbours or coasts. It is sometimes used as a landing-pier.
Jib
A long beam that stands out from a crane from which the hook hangs down.
Joint
A place where two things or parts are joined.
Juliett (J)
International Radiotelephony Spelling Alphabet, meaning:.”I am on fire and have dangerous cargo on board: keep well clear of me.” Or.”I am leaking dangerous cargo.””
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition”
Jurisdiction
The authority of an official organization to make and deal with especially legal decisions.
Keel
The timber or connected plates running from stem to sternpost on the bottom of the centerline of a vessel; The lowest structural member of a ship which runs the length of the vessel at the centerline and to which the frames are attached.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
https://officerofthewatch.com/tools/maritime-dictionary/
Keep Off
To not go onto an area, or to stop someone or something going onto an area.
Keep Watch
To watch or observe for any danger.
Kilo (K)
International Radiotelephony Spelling Alphabet, meaning:.I wish to communicate with you.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Knots (kn)
The speed in nautical Miles per hour.
Ladder
A framework of wood, metal, rope, etc., on which a person can climb up or down.
Lagoon
An area of sea water separated from the sea by a reef (a line of rocks and sand)
Lake freighter (lakers)
Lake freighters are bulk carrier vessels that navigate the Great Lakes of North America.
Landing
Going on shore.
Lash
To secure something against movement.
Lashing
Securing containers or other cargo with ropes and rods.
Lashing Chain
A chain securing containers or other cargo.
Lateral marks
Lateral marks are generally used for well defined channels in conjunction with a conventional direction of buoyage. They indicate the port and starboard hand sides of the route to be followed.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
Latitude (LAT)
Distance north or south from the equator, measured in degrees.
Launch
To set a boat or ship in the water.
Lay Day
The time allowed to the master of a vessel for loading or unloading.
Laying down
Beginning construction in a shipyard.
Leach
To remove substances from soil by washing it.
Leak
An unintended hole or crack through which liquid or gas enters or escapes.
Leakage
A crack or crevice which admits liquids, gases or other elements in or out.
Leave Port
Depart from the port, sail out of the port.
Leaving Vessel
A vessel departing from the port.
Lee side
Side of a ship sheltered from the wind.
Lee Tide
A tidal current running in the direction towards which the wind is blowing.
Leeward
The general direction to which the wind blows in the direction of the leeside, opposite to windward or weather side.
Leeway
Area to leeward of a vessel.
Left-Handed Screw
A screw rotating in a counterclockwise direction.
Length
The longest extent of anything as measured from end to end.
Length Between Perpendiculars (LBP)
The length of a hull between the forward and the after perpendicular.
Length over all (LOA)
Maximum length of a vessel including all permanently fitted equipment protuding above the hull.
Let Go
(of an anchor) To drop the anchor.
(of a line) To cast off the line, release the line.
Liability
A state when someone is legally responsible for something.
Life Buoy
A form of a buoyant device for supporting persons fallen into the water or washed overboard.
Life Jacket/Vest
A sleeveless jacket of buoyant or inflatable construction for supporting the wearer in water.
Life Saving Appliances (LSA)
Appliances and devices which support and assist human life in distress at sea.
Lifebelt
A belt like device to prevent someone to go overboard, if hook to a strong point.
Lifeboat
Unsinkable boat to accommodate crew and passengers in case of abandoning the vessel, device to evacuate people.
Lifeboat Station
A place assigned to crew and passengers where they must gather before being ordered into the lifeboats.
Life-Float
A ring-shaped float of balsa wood or metal tubing having a grating at the centre for rescuing a number of survivors from a foundered ship.
Liferaft
An inflatable raft used in an emergency when a ship must be abandoned or when a plane is downed at sea.
Lift on – Lift off
Vertical system of loading containers by shore-based (gantry) cranes.
Lift on – Lift off vessel (Lo-Lo Ship)
A ship which is loaded and unloaded by shore-based (gantry) cranes.
Light Switchboard
A panel used for turning on ship lights and illuminate the ship’s superstructure and the decks.
Lighter Aboard Ship (LASH)
Barges (lighters) are loaded aboard a bigger vessel for transport.
Lightering
The process of transferring oil cargo between vessels of largely different sizes.
Lightship weight (tons)
This is the weight of the ship including the regular inventory, but without any cargo, fuel or crew. The regular inventory includes: anchors, life-saving appliances, lubrication oil, paint, etc.
Lima (L)
International Radiotelephony Spelling Alphabet, meaning: In harbour:.The ship is quarantined.”
At sea:.You should stop your vessel instantly.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition”
Line
A rope or wire for mooring a ship, cable, cord.
Liner
A vessel sailing on a regular line to a fixed timetable.
Liquefied natural Gas Carrier (LNG Carrier)
A ship specially constructed for the carriage of natural gas in a liquid form.
Liquefied Petroleum Gas Carrier (LPG Carrier)
A ship specially constructed for the carriage of petroleum gas in a liquid form.
Liquid Cargo
A kind of cargo which is fluid and pumpable for transfer.
List
A vessel’s angle of lean or tilt to one side.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms#M
Littoral
Relating to or near the coast, coastal.
Lloyd’s Register
Lloyd’s Register is a maritime classification society with the main branch in London, which establishes and maintains technical standards for the construction and operation of ships and offshore structures.
Load
Put cargo into holds or tanks of the ship or onto barges.
Load Line
Defined maximum immersion of a vessel.
Load Line Mark
Painted mark of maximum immersion of the vessel, located at the main frame of a vessel.
Loading
Putting cargo onto barges or into the holds of a ship.
Loading Rate
Measure indicating the volume of cargo loaded within a given period.
Local warning
A navigational warning which covers inshore waters, often within the limits of jurisdiction of a harbour or port authority.
GMDSS Handbook, IMO, London 2001″
Locating
Means the finding of ships, aircraft, units or persons in distress.
GMDSS Handbook, IMO, London 2001
Lock
An enclosure in a canal with gate at each end.
Log Book
A book in which events connected with the ship are entered, main logs kept on board are the navigating log and the engine log.
Longitude (LON)
Distance east or west from the zero meridian on the earth´s surface, measured in degrees.
Longitudinal
Running or placed along the length, opposed to transversal.
Longitudinal center of buoyancy (LCB)
Center of buoyancy in longitudinal direction.
Lookout
A crewmember stationed as a visual watch.
Low sulphur fuel oil (LSFO)
Heavy fuel oil with a sulfure content < 1,0%. normaly IFO which was desulphurized.
www.marquard-bahls.com/de/news-info/glossar
Lube Oil Additives
Chemicals added to mineral oils to improve existing properties.
Lubricate
To grease, to cause machinery to move or work easily.
Lubricating/Lube Oil (LO)
Oil which is put on the moving parts of a machine (engine) to make them move more smoothly.
Lug Nut
A rounded nut that covers the end of a bolt ( as for holding a car wheel in place)
Magnetic Compass
An instrument that indicates direction relative to the earth’s magnetic north pole.
Maiden voyage
The first voyage of a vessel after delivery from new-building to her owner.
Main Air Compressor
Main compressors to supply high pressure air to the main engine start air system.
Main Engine (M/E)
The engine used as the primary propulsion unit.
Main Engine Emergency Control
Controls used to operate the main engine in emergency situations.
Main Switchboard (MSB)
Is a switchboard which is directly supplied by the main source of electrical power and is intended to distribute electrical energy to the ship’s services.
SOLAS, Consolidated Edition 2014, IMO
Maintenance
Keeping in good condition by repairs, cleaning etc..
Make a Lee
Adjust a vessels heading to make a sheltered area leeward of a vessel.
Making way
If a vessel is moving under its own power resulting in a movement through the water.
Malfunction
A failure in the proper functioning.
Man Overboard (MOB)
Emergency when a person fell overboard or a person was sighted in the water.
Manhole
An opening in the cover, deck or tank through which a member of the crew can enter inside.
Manifold
A system of pipes and valves designed to distribute substances.
Manifold Flange
A flange to which the shore loading arms or hoses are connected.
Manifold Valve
A valve at the ship and shore interface used to route the cargo to the desired pipeline.
Manoeuvring
Changing the heading; turning a ship.
Marina
A small port that is used for pleasure craft.
Marine
Related to the sea or sea transport.
Marine Diesel Oil (MDO)
Is a type of fuel oil for ships and is a blend of gasoil and heavy fuel oil.
https://en.wikipedia.org/wiki/Marine_diesel_oil
Marine Ecosystem
The complex of living organisms in the ocean environment.
Marine evacuation system (MES)
Is an appliance for the rapid transfer of persons from the embarkation deck of a ship to a floating survival craft.
SOLAS, Consolidated Edition 2014, IMO
Mariner
A seaman, sailor, seafarer.
Maritime Mobile Service Identity (MMSI)
Code to identify vessels with the GMDSS/DSC system.
https://www.marineterms.com/search.html?Searchword=MMSI
Maritime Pollution Convention (MARPOL)
International Convention for the Prevention of Pollution from ships, developed by the IMO.
Maritime Rescue Co-ordination Centre (MRCC)
Land based centre from which SAR efforts are coordinated.
Maritime Rescue Sub-Centre (MRSC)
Land based centre from which SAR efforts are coordinated in a SAR sub region.
Maritime Safety Information (MSI)
Means navigational and meteorological warnings, meteorological forecasts and other urgent safety related messages broadcast to ships.
GMDSS Handbook, IMO, London 2001
Maritime security Level 1 (MARSEC 1)
Means the level for which minimum appropriate protective security measures shall be maintained at all times.
Guide to Maritime Security and the ISPS Code, 2012 Edition
Maritime security Level 2 (MARSEC 2)
Means the level for which appropriate additional protective security measures shall be maintained for a period of time as a result of heightened risk of a security incident.
Guide to Maritime Security and the ISPS Code, 2012 Edition
Maritime security Level 3 (MARSEC 3)
Means the level for which further specific protective security measures shall be maintained for a limited period of time when a security incident is probable or imminent, although it may not be possible to identify the specific target.
Guide to Maritime Security and the ISPS Code, 2012 Edition
Mark
A seamark or a landmark.
Mark Buoy
A warning buoy.
Mast
A vertical spar for supporting sails, rigging, flags etc.
Master
Ship’s Captain.
Master Valve
A valve which separates tanks in fore-and-aft direction.
Master’s Certificate
The certificate of competency for master of a ship (of 3000 GT or more), issued by the national maritime or transport authority and recognized according to IMO STCW Convention 1978/1995.
Masthead light
A white light placed over the fore and aft centerline of a vessel showing an unbroken light over an arc of the horizon of 225°.
Mate
A deck officer on board a merchant ship.
MAYDAY
The international radiotelephony distress signal, repeated three times.
IAMSAR Manual, Volume 1, IMO, London 1998
Mayday relay
Issuing a distress call on behalv of another station.
Medical First Aid Guide (MFAG)
Medical First Aid Guide for use in accidents involving dangerous goods.
MEDICO
Medical advice. Exchange of medical information and recommended treatment for sick or injured persons where treatment cannot be administered directly by prescribing medical personnel.
IAMSAR Manual, Volume 1, IMO, London 1998″
Mediterranean Sea (MED)
Merchant navy
All ships engaged in the carriage of goods i.e. All commercial vessels, which excludes tugs, fishing vessels, offshore oil rigs, etc..
Merchant ship
A vessel that carries goods against payment of freight; commonly used to denote any non-military ship but accurately restricted to commercial vessels only.
Metacentric height (GM )
Vertical distance between the centre of gravity and the initial metacentre.
Metacentric height above keel (KM)
The height of the initial metacentre M above the base plane. It depends on a geometrical form of ship’s submerged part.
Metacentric radius (BM)
The distance between B and M is the radius of the circle B is making around the metacentre when the ship heels. The metacentre can move out of the centre line for higher heeling angles.
Meteorological Area (METAREA)
A geographical sea area, established for the purpose of co-ordinating the transmission of radio meteorological warnings.
Meteorological visibility
The maximum range at which a large object, such as land masses or mountains, can be seen. Also referred to as Meteorological Range.
Metric ton (mt)
2204 lbs or 1,000 kilograms.
Mid-Deck Tanker
A tanker having an additional deck intended to limit spills if the tanker is damaged.
Midship(s)
The centre of the vessel.
Midships!
A standard wheel order to put the rudder in the zero position.
Mike (M)
International Radiotelephony Spelling Alphabet, meaning: “My vessel is stopped and making no way through the water.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Minimum Breaking Load (MBL)
The minimum breaking load describes the maximum force under straight pull a free length of rope can be exposed to until it breaks.
Mist
Thin fog produced by very small drops of water gathering in the air, visibility between 1000 and 2000 m.
Misty
Foggy.
Mixed General Cargo
Goods packed in different cases, boxes, bags, barrels etc..
Moderate Visibility
From 2 to 5 nautical miles (6 visibility scale)
Moisture
Water content.
Moment to Change Trim (MCT/MCTC)
The moment needed to change the trim by one centimetre.
Monitor
To regularly check and watch something (a situation) carefully in order to discover what is happening.
Moor
To secure a boat by means of ropes or wires made fast to the shore, or to a buoy or anchor.
Mooring
Holding a ship in place by lines, cables chains or by anchors.
Mooring Berth
A place where a ship can moor.
Mooring Bitts
Vertical fittings of steel or iron or wood, a double bollard for mooring.
Mooring Bouy
Warping buoy for securing a vessel.
Mooring lines
Cables or ropes to tie up a vessel.
Mooring rope
Ropes used to tie up a vessel; ropes to make fast a vessel.
Motorship (MS)
A ship propelled by an engine.
Mud
Wet and sticky earth.
Multi-Purpose Vessel
A ship which can be load different types of cargo, mostly equipped with own derricks, but not usable for carrying liguid cargos in bulk..
Muster drill
A drill conducted by the crew of a ship. On passenger vessels the Passengers are required to participate in the drill so that they could be told how to evacuate safely in the event of an emergency on board the ship. SOLAS requires that a muster drill be held within 24 hours of a ship’s departure from its embarkation port.
SOLAS, Consolidated Edition 2014, IMO
Muster List
A list of crew and passengers and their functions in distress or drill.
Muster station
The location on a vessel, where all persons on board go during an emergency or a muster drill. If a person is believed missing, all passengers would report to their muster station for a head count.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms#M
Natural Disaster
An event caused by nature which results in great harm, damage or death, or serious difficulty.
Natural Resources
Useful or valuable things that exist in nature and can be used by people, e.g. Oil, trees etc.
Nautical Chart
A sea map showing the contours of the land and the depths below the sea level, navigational marks of interest etc.
Nautical miles (NM)
1NM=1.852KM.
Navigable
Able to be transited by a vessel.
Navigable Waters
Water areas that can be sailed by a vessel.
Navigating Bridge
A place on board ship that houses all the navigation instruments.
Navigation
Art and skill of steering the ship and taking the ship safely from one point (port) to another.
Navigation Lights
A coloured source of illumination on a waterborne vessel, used to signal a craft’s position, heading, and status.
Navigation Mark
A pilotage aid which identifies the approximate position of a maritime channel, hazard and administrative area to allow boats, ships and seaplanes to navigate safely.
Navigational Aid
A device intended to assist navigators in determining their position or safe course, or to warn them of dangers or obstructions to navigation, e.g. Seamarks and landmarks, charts and navigation instruments.
Navigational Area (NAVAREA)
A geographical sea area, established for the purpose of co-ordinating the transmission of radio navigational warnings.
Navigational text Messages/navigational Warnings by telex (NAVTEX)
Means the co-ordinated broadcast and automatic reception on 518 khz of maritime safety information by means of narrow-band direct-printing telegraphy using the English Language.
GMDSS Handbook, IMO, London 2001″
Netto Tonnage (NT)
Neutral equilibrium
It occurs when the vertical position of CG coincides with the transverse metacentre. In such a condition, no righting lever is generated at any angle of heel. As a result, any heeling moment would not give rise to a righting moment, and the ship would remain in the heeled position as long as neutral stability prevails.
New danger marks
New danger marks were introduced in 2006 and are used as emergency marks for recent wrecks or new hazards which do not appear on nautical charts. They are coloured with blue and yellow vertical stripes.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
North-up (N-up)
Display setting on radar or ECDIS, the depiction is stabilized to true north.
Not Under Command (NUC)
A vessel which through exceptional circumstances is unable to manoeuvre and thus unable to keep out of the way of other ships.
Note Of Protest
A written declaration by the Master of circumstances beyond his control that might have given rise to suspecting damage to the ship and the cargo, also when in breach of charter party terms.
Notice to Mariners (ntm)
An official publication of the hydrographic office of the navy about navigation safety, maintenance of the fairways, lights, buoys etc.
November (N)
International Radiotelephony Spelling Alphabet, meaning: “No/Negative.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Nozzle
A tube-like device at the end of a pipe, or a hose, by which a stream is directed.
Nuclear ship
Is a ship provided with a nuclear power plant.
SOLAS, Consolidated Edition 2014, IMO
Nut
A small piece of metal with a threaded hole for screwing on to a bolt.
Obstruction
Any object on the seabed which projects higher than the surrounding seafloor.
Ocean
A great body of water that surrounds the land masses on the earth.
Off Station
(of buoys) Not in charted position.
Officer of the watch (OOW)
A deck officer assigned with the duties of watch keeping and navigation on a ship’s bridge. He is the officer in charge.
Offshore
Away from or at a distance from the coast.
Offshore Structure
A structure which is at a distance from the coast.
Oil Clearance
Removal of oil film from the surface of the sea, oil skimming from the surface of the water.
Oil Drilling Rig
A large installation drilling for oil at sea.
Oil Exploration
Searching for and discovering oil.
Oil Product
Product refined from crude oil.
Oil Seep
The slow moving or spreading of oil as it is released from something.
Oil Slick
A layer of oil that is floating over a large area of the surface of the sea, usually because an accident has caused it to escape from a ship, rig or container.
Oil Spill
An amount of oil unintentionally fallen or flowed over from a pipe, container etc.
Oil Tanker
A ship for the carriage of crude oil and its products.
Oil Terminal
An industrial facility for the storage of crude oil and oil products.
Oil Water Separator
A device which separates oil from bilge water.
Oily Residues
An oily substance that remains after a chemical process or oily parts that remain after the rest of the substance has gone.
On Duty
On watch
On-scene
The search area or the actual distress site.
IAMSAR Manual, Volume 1, IMO, London 1998
On-scene co-ordinator (OSC)
A person designated to co-ordinate search and rescue operations within a specified area.
IAMSAR Manual, Volume 1, IMO, London 1998
On-scene endurance
The amount of time a facility may spend at the scene engaged in search and rescue activities.
IAMSAR Manual, Volume 1, IMO, London 1998″
Open Sea
Deep Sea.
Open top container
A container fitted with a tarpaulin roof that can be detached from the top. Designed for over-height cargo Hapag-Lloyd AG: Container Specifications.
Optimal search area
The search area which will produce the highest probability of success when searched uniformly with the search effort available.
IAMSAR Manual, Volume 1, IMO, London 1998″
Optimal search plan
A plan that maximizes the probability of success of finding the search object using the available search effort.
IAMSAR Manual, Volume 1, IMO, London 1998″
Ordinary seaman (OS)
A naval rating of the deck department of a ship. The position is an apprenticeship to become an able-bodied seaman.
Ore
Natural substance from which metals and non-metallic materials can be extracted.
Ore And Coal Carrier
A vessel for the carriage of ore and coal in bulk.
Oscar (O)
International Radiotelephony Spelling Alphabet, meaning: “Man overboard”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Out of gauge cargo (OOG)
Cargo is considered to be out of gauge if it exceeds standard dimensions. It may still fit inside a standard container, but it may be so large or heavy that special equipment is needed to handle the size and weight Hapag-Lloyd AG: Container Specifications.
Out Of Order
Not functioning.
Out-Bound
A vessel leaving the port or fairway and going to sea.
Outward Vessel
A ship leaving the port.
Over
Word signalling the end of a turn in an exchange or transmission.
Overboard
Over the ship’s side into the sea.
Overhauling
A thorough examination for good working order.
Overtaking
To come up from behind and pass.
Overtime
Additional working time beyond the usual time.
Pacific Ocean Region (POR)
One of the four Ocean Regions that are covered by Inmarsat C.
Painter
Line in the bow of a small boat for towing or making fast; line connected to rescue boats and liferafts to keep the bow in the right direction during launching.
Pallet
A large metal plate or flat wooden frame for lifting and storing heavy goods.
Panama Lead
Bow fairlead for head rope and mooring ropes.
PAN-PAN
The international radiotelephony urgency signal. When repeated three times, indicates uncertainty or alert, followed by.ture of urgency.
IAMSAR Manual, Volume 1, IMO, London 1998
Papa (P)
International Radiotelephony Spelling Alphabet, meaning:
In harbor:.”All persons should report on board as the vessel is about to proceed to sea.”
At sea: It may be used by fishing vessels to mean:.My nets have come fast upon an obstruction.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition”
Passage
A narrow channel, a canal or a ship’s voyage, transit across the sea or channel.
Passenger Ferry
A ferry boat carrying passengers.
Passenger Liner
A passenger vessel or cruise vessel.
Passenger List
A list of.mes of all the passengers on board ship.
Passenger
Is every person other than: the master and the members of the crew or other persons employed or engaged in any capacity onboard a ship on the business of that ship; and a child under one year of age.
SOLAS, Consolidated Edition 2014, IMO
Passenger ship
Is a ship which carries more than twelve passengers.
SOLAS, Consolidated Edition 2014, IMO
Perishable Cargo
Cargo loaded into refrigerated containers or refrigerated holds or carried in reefer ships, which are specially built for that purpose (like meat, fish, bananas, dairy produce, fruits etc.)
Pesticide
A chemical substance used to kill harmful insects, small animals, wild plants and other unwanted organisms.
Petrol Carrier
A vessel for the carriage of gasoline.
Petty Officer
A rank between an officer and a rating, being in charge of ratings, e.g. A boatswain or donkeyman.
Phase-Out
Gradually stop using something.
Pier
A structure built from the shore and into the water to allow boats/ships to berth on either side, jetty, dock.
Pillar Buoy
A buoy with a staff or spar.
Pilot
A person giving advice and assistance to the ship’s bridge team with respect to transiting an area.
Pilot Boat
A small boat taking pilots to and from ships.
Pilot Ladder
A ladder lowered from the ship’s side for the pilot to come up on board.
Pilot Station
The place where the services of pilots are obtained.
Pilotage
The services of qualified navigators with local knowledge to assist in navigation in particular areas.
Pilotage Compulsory
Pilotage obligatory, mandatory.
Pipeline
A system of pipes or channels for supplying something like oil.
Piracy
An attack and/or robbery by pirates.
Piston
A part of an engine that moves up and down the cylinder and thus moves the crankshaft.
Piston Pin
A pin that rests in two bored holes in the pistons and passes through the eye of the connecting rod.
Piston Ring
A circular metal spring used to stop gas or liquid (lubricating oil)
Escaping from between a piston and its cylinder.
Piston Rod
A rod connecting the piston to the crosshead.
Pitch
The distance that one point on the face of a propeller blade moves in one revolution, angle of
Propeller blade.
Pitching
A movement where the vessel’s bow and stern rise and fall with the oncoming waves.
Pivot
A point or a shaft on which something turns.
Plankton
Very small plants and animals which float on the surface of the sea and on which other sea animals feed.
“Planning time
A period during a SAR incident when an effective plan of operations is
Developed.
IAMSAR Manual, Volume 1, IMO, London 1998″
Pliers
A hand tool for taking out.ils and cutting wire.
Plimsollmark
Painted and welded mark at the main frame to show the maximum allowed immersion; load line mark.
Plot
To draw a position on a chart.
Plot The Course
To draw a course on a chart.
Plotter
A device for plotting the course and position.
Plotting Chart
A sea map for plotting courses and positions.
Plug
The piece in a cock that can be turned to regulate the flow of liquid or gas, a round piece of rubber that blocks a hole.
Point, compass point
A term often used to report a vessels or an objects relative bearing. The compass rose is divided into 32 points. This means that every point corresponds to 11.25° An angle of 90° corresponds with 8 points. If an object is further astern than it is abaft the stbd./port beam..
Poisoning
A disturbance to an organism caused by absorbtion of a harmful substance.
“Polar orbiting satellite service (POSS)
Means a service which is based on polar orbiting satellites which receive and
Relay distress alerts from satellite epirbs and which provides their position.
GMDSS Handbook, IMO, London 2001″
Pollutant
A substance that is harmful to the environment.
Pollution
Damage caused to water, air, or land by harmful substances or waste.
Poor Visibility
Visibility from 1000 metres to 2 nautical miles.
Port
A harbour or the left hand side of the ship.
Port Authority
A government or port city office in charge of port administration and development.
Port Facility Security Officer (PFSO)
Means the person designated as responsible for the development, implementation, revision and maintenance of the port facility security plan and for liaison with the ship security officers and the company security officers.Guide to Maritime Security and the ISPS Code”, 2012 Edition
Port Facility Security Plan (PFSP)
Means a plan developed to ensure the application of measures designed to protect the port facility and ships, persons, cargo, cargo transport units and ship’s stores within the port facility from the risk of a security incident.Guide to Maritime Security and the ISPS Code”, 2012 Edition
Port Of Destination (POD)
The harbour at which the cargo is delivered to the consignee.
Portable
A characteristic of an object which can be carried and used anywhere, e.g. Portable extinguisher, portable radio.
Portside
The left hand side of a ship when facing forward.
Position
A geographical location normally expressed in degrees and minutes of latitude and longitude.
Position Angle
The number of degrees an object is above the horizon.
Positive Stability
Is the ability of a craft to return to its original position after the removal of a heeling moment.
SOLAS, Consolidated Edition 2014, IMO
Power-driven vessel
Means any vessel propelled by machinery COLREG
Primary Swell
The swell system having the greatest height from trough to crest.
Proceed
To move forward, go forward, continue the voyage.
Product Tanker
A tanker which carries various grades of oil products.
Propel
To push or move a ship.
Propeller
A device with twisted blades, which while rotating causes the boat to move.
Propulsion
The force that drives the ship forward.
Propulsion Generator
A generator propelling the ship.
Public Health
The health and well-being of all the people in a particular area.
Public spaces
Are those portions of the accommodation which are used for halls, dining rooms, lounges and similar permanently enclosed spaces.
SOLAS, Consolidated Edition 2014, IMO
Pump
A device which pumps in and out various liquids.
Pumping Plant
A facility that is used to transfer liquid cargo from ashore storage tanks to the ship’s cargo tanks.
Pumping Room
A room ashore on a pumping plant or on board from which the cargo flow is controlled.
Pure Car Carrier (PCC)
Vessel designed to carry only rolling cargo like cars.
Purifier
A device which purifies fuel from particulars and water.
Purser
An officer on board ship who keeps the ship’s accounts and pays the crew.
Pushrod
A rod working in compression to operate one machine part from another.
Quarter Deck
Part of the highest level of a ship, used mostly by officers.
Quartermaster
An officer, resposible for steering and signaling (on land armies he supervises stores or barracks)
Quay
A wharf, dock, berth, typically one built parallel to the shoreline.
Quebec (Q)
International Radiotelephony Spelling Alphabet, meaning: My vessel is healthy and I request free pratique.
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Racon
A radar transponder used to mark maritime navigational hazards.
Radar Coverage
An area covered by shore based radar surveillance.
Radar Plot
Position obtained by radar.
Radar Range
Scale of the radar display.
Radio Beacon
A radio station transmitting radio signals to ships and planes to help them find their
Position by means of radio compass.
Radio Detection And Ranging (RADAR)
An instrument for determining the presence of objects, their range and bearing.
Radiotelephone
A communication device which allows two or more people to talk using transmission of signals by modulation of electromagnetic waves.
Raft
A flat boat, made of boards fastened together and floated on water.
Ramp
A sloping surface connecting two levels, as on ro-ro ships and ferries.
Range
The distance of something to be located, the extent or scope of something, e.g. VHF, radar, etc.
Range of stability
Range of positive rigthing arms.
Rate Of Turn (ROT)
Turning speed of a vessel in degrees per minute.
Rating
The relative standing of a sailor in a ships rank, not an officer.
Reef
Sharp rocks often made of coral.
Reefer Container
A container for the carriage of refrigerated cargo.
Refrigerated Cargo
Cargo frozen for preservation during sea transport.
Refrigerated Cargo Vessel
A vessel designed for the carriage of cargoes such as fruit, meat and other fresh produce which require transportation at low temperatures.
Refrigeration Unit
Cooling plant to keep the temperature of a compartment below 0°C.
Relative bearing
Bearing relative to heading of a vessel, expressed as the angular difference between the heading and the direction. It is usually measured from 000° at the heading clockwise through 360°.
Relative Motion (RM)
Display setting on radar or ECDIS, the depiction is stabilized to the own ships position.
Relief Crew
Replacement crew.
Relieve
To replace or change someone after his watch or contract.
Reporting Point
A mark or position at which a vessel is required to report to the local VTS station to
Establish her position.
Rescue
An operation to retrieve persons in distress, provide for their initial medical or other needs, and deliver them to a place of safety.
IAMSAR Manual, Volume 1, IMO, London 1998
Rescue boat
Is a boat designed to rescue persons in distress and to marshal survival craft.
SOLAS, Consolidated Edition 2014, IMO
Rescue Buoy
A lifebuoy.
Rescue Co-ordination Centre (RCC)
Land based centre to organize SAR effort.
Restricted Area
An area onboard where, for safety reasons, entry is only permitted for authorised crew members.
Restricted Visibility
Reduced visibility e.g. By fog or snow or rain.
Restricted Waters
Water areas such as bays, narrow channels and river estuaries, which restrict navigation.
Retrieval
Is the safe recovery of survivors.
SOLAS, Consolidated Edition 2014, IMO
Revolutions
Turns around an axis.
Rhumb line
Straight line between two points on a Mercator projection chart.
Rig
To prepare for use (e.g. The pilot ladder)
Roll-on Roll-off (Ro-Ro)
Method of cargo transfer between vessels and shoreside in which cargo is driven on/off using fork-lifts, primemover/ trailer combinations, etc.
https://officerofthewatch.com/tools/maritime-dictionary/
Roll-on Roll-off and Passenger (Ro-Pax)
Such ships can carry roll-on/off cargo and passengers.
Romeo (R)
Has no meaning in the International Radiotelephony Spelling Alphabet
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Rotate
To turn around a point or along an axis.
Rough Sea
Turbulent sea.
Rough Weather
Foul weather, heavy weather.
Route
A way or a course or traveling.
Routing
Scheduling of an itinerary or route (e.g. Weather routeing)
Rubbish
Waste, worthless or unwanted material.
Rudder
A device at the stern of a ship used for steering.
Rudder Angle Indicator
An instrument indicating the angle of the rudder (e.g. For steering)
Rudder Blade
A flat cutting part of a rudder.
Rudder flange
The flange which ties the main part of the rudder to the rudder shaft. It may be horizontal or vertical.
Rudder stop
Fitting to limit swing of the rudder.
Run Aground
An event when a vessel hits a rock or the bottom of the sea or a waterway.
Runoff
(surface) The flow of water from rain, snow or some other source over land.
Rust
Is another.me for iron oxide, which occurs when iron or an alloy that contains iron, like steel, is exposed to oxygen and moisture for a long period of time.
Rusty
Affected by rust, covered with rust.
Safe Speed
Speed of a vessel allowing the maximum possible time to stop to avoid a collision.
Safe water marks
Safe water marks indicate there is safe water all around the mark. They are used at the start of a buoyed channel when approaching a harbour from the sea. They coloured with red and white vertical stripes and are also used to indicate the middle of a fairway.
Admirality Charts and Publications: IALA Maritime Buoyage System. Edition 5
Safe Working Load (SWL)
The maximum permissible load to be put on a deck or on the weakest part of the gear, such as a crane or a derrick or a rope; Certified load limit applied to lifting appliances and gear.
Safety Gloves
Gloves used at work to protect hands.
Safety of Life at Sea (SOLAS)
A statutory regulation of the IMO dealing with the safety of life at sea on merchant ships. It specifies the minimum standards for the construction, equipment and operation of ships, compatible with their safety.
Safety Valve
A valve that opens automatically in the event of too high pressure.
Sagging
Sagging is the stress a ship’s hull or keel experiences that causes the center or the keel to bend downward.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Sail
A piece of canvas extended to the wind in such a way as to transmit the force of the wind to rigging fixed on a ship enabling it to move.
Sailing vessel
Any vessel under sail provided that propelling machinery, if fitted, is not being used COLREG
Salt Water Arrival Draft (SWAD)
The draft a vessel has in salt water at the time of arrival.
Salt Water Departure Draft (SWDD)
The draft a vessel has in salt water at the time of departure.
Salvage
The process of rescuing, refloating, patching or repairing a ship from or in peril.
Satellite Aerial
An aerial used by a shipboard positioning system.
Save Our Souls (SOS)
An old morse signal sent out in an emergency.
Screw Propeller
A rotary propelling device for a ship or airplane, consisting of a number of blades that rotate from a central hub.
Scupper
Any opening or tube leading from the waterway through the ship’s side, to carry away water from the deck.
Scupper plug
Plug to close the scuppers watertight, to prevent any water pollution as result of an oil pollution during cargo or bunkering operations.
Sea
Condition of the surface resulting from waves and swells.
Sea Area A1 (A1)
Means an area within the radiotelephone coverage of at least one VHF coast station in
Which continuous DSC alerting is available, as may be defined by a Contracting Government.
GMDSS Handbook, IMO, London 2001″
Sea Area A2 (A2)
Means an area, excluding sea area A1, within the radiotelephone coverage of at least one MF coast station in which continous DSC alerting is available, as may be defined by a Contracting Government.
GMDSS Handbook, IMO, London 2001″
Sea Area A3 (A3)
Means an area, excluding sea areas A1 and A2, within the coverage of an INMARSAT geostationary satellite in which continuous alerting is available.
GMDSS Handbook, IMO, London 2001
Sea Area A4 (A4)
Means an area outside sea areas A1, A2 and A3.
GMDSS Handbook, IMO, London 2001
Sea Bed
Sea bottom.
Sea Chest
Construction part of the ships hull; opening in the hull from which sea water can be sucked for cooling or processing purpose.
Sea going
Capable of going to sea.
Sea water (SW)
Water with a salt content and a density of 1,025t/m3.
Seafarer
A sailor, seaman.
Seagoing Vessel
A vessel designed or fit for going to open sea.
Seaman
A person skilled in seamanship, rating.
Seamanlike
Typical of a good seaman, acting like a good seaman.
Seamanship
The skill of operation, navigation and safe maintenance of a ship.
Seamark
An elevated conspicuous object at sea or on land serving to guide or warn seafarers.
Seaquake
An underwater earthquake.
Search
An operation, normally co-ordinated by a rescue co-ordination centre or rescue sub-centre, using available personnel and facilities to locate persons in distress.
IAMSAR Manual, Volume 1, IMO, London 1998
Search and Rescue (SAR)
Effort to help someone in distress at sea.
Search and rescue co-ordinating communications
Communications necessary for the co-ordination of facilities participating in a Search and Rescue operation.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and rescue co-ordinator (SC)
One or more persons or agencies within an Administration with overall responsibility for establishing and providing SAR services, and ensuring that planning for those services is properly co-ordinated.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and rescue facility
Any mobile resource, including designated search and rescue units, used to conduct search and rescue operations.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and rescue incident
Any situation requiring notification and alerting of the SAR system and which may require SAR operations.
IAMSAR Manual, Volume 1, IMO, London 1998
Search and rescue mission co-ordinator (SMC)
The official temporarily assigned to co-ordinate response to an actual or apparent distress situation.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and rescue plan
A general term used to describe documents which exist at all levels of the national and international search and rescue structure to describe goals, arrangements, and procedures which support the provision of search and rescue services.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and rescue service
The performance of distress monitoring, communication, co-ordination and search and rescue functions, including provision of medical advice, initial medical assistance, or medical evacuation, through the use of public and private resources, including co-operating aircraft, vessels and other craft and installations.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and rescue stage
Typical steps in the orderly progression of SAR missions. These are normally Awareness, Initial Action, Planning, Operations, and Mission Conclusion.
IAMSAR Manual, Volume 1, IMO, London 1998″
Search and Rescue Transponder (SART)
Portable radar transponder used in distress; the transponder answers to a received radar beam; the signal can be seen on x-band radar.
Search Area
The area, determined by the search planner, that is to be searched. This area may be sub-divided into search sub-areas for the purpose of assigning specific responsibilities to the available search facilities.
IAMSAR Manual, Volume 1, IMO, London 1998
Search object
A ship, aircraft, or other craft missing or in distress or survivors or related search objects or evidence for which a search is being conducted.
IAMSAR Manual, Volume 1, IMO, London 1998
Search pattern
A track line or procedure assigned to an SRU for searching a specified area.
IAMSAR Manual, Volume 1, IMO, London 1998
Search radius
The actual search radius used to plan the search and to assign search facilities. It is usually based on adjustments to the optimal search radius that are needed for operational reasons.
IAMSAR Manual, Volume 1, IMO, London 1998″
Searchlight
Powerful beam of light in a particular direction or an apparatus producing this light.
Seaworthiness
Vessel’s readiness in all respects for a voyage at sea.
Second Mate/Officer
A deck officer of the merchant vessel next in rank after the first mate.
Secondary Swell
Swell systems of less height than the primary swell.
Securing
Lashing the cargo.
SECURITE
A marker word for a safety call, a signal to announce a safety message.
Self-Contained Breathing Apparatus (SCBA)
An apparatus consisting of a suitable face mask, combined with a hose and source of fresh air, generally in the form of a tank of compressed air, to provide breathable air in an immediately dangerous to life or health atmosphere. It is mosty used by rescue workers and firefighters.
https://officerofthewatch.com/tools/maritime-dictionary/
Self-Contained Underwater Breathing Apparatus (SCUBA)
Such apparatus is part of diving equipment and consisting of a lunge automate, a hose and a tank of compressed air carried by the diver itself.
SET
The direction toward which a current is flowing is called the SET of the current.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Severe Weather Conditions
Weather conditions which are not favourable for human beings and property.
Sewage
Waste substances, especially from human bodies (urine or excrement) or waste water.
Sewage Tank
A receptacle for collecting waste from the sewer pipes.
Shackle
A standard length (15 fathoms, 27,5 meters) of an anchor cable.
Shackle Pin
A pin that secures the shackle.
Shaft
A revolving rod that transmits motion or power, usually used of axial rotation.
Shear forces
The result of vertical forces acting on a ship because of local differences between weight and buoyancy. At sea the shear forces will change as a result of wave impact which then periodically changes the buoyancy distribution. They are expressed in tons.
Klaas van Dokkum: Ship Knowledge, 2nd Edition
Shift
To move from one side to another or a person’s scheduled period of work.
Shifting
Moving the ship along the quay or cargo movement inside the hold.
Ship Handling
Ship manoeuvring.
Ship in Operation
A ship employed in the transportation of cargo or passengers.
Ship Propulsion
A means of propelling the vessel.
Ship Propulsion Turbine
A turbine for propelling the vessel.
Ship Salvage
Saving the ship and its cargo from dangers of the sea.
Ship Security Alert System (SSAS)
Provides the means by which a ship can transmit a security alert to a competent authority on shore, indicating that the security of the ship is under threat or has been compromised.
Guide to Maritime Security and the ISPS Code, 2012 Edition
Ship Security Officer (SSO)
The person on board the ship, accountable to the master, who is designated by the Company as responsible for the security of the ship, including implementation and maintenance of the ship security plan, and for liaison with the company security officer and the port facility security officers.
Guide to Maritime Security and the ISPS Code, 2012 Edition
Ship Security Plan (SSP)
A plan developed to ensure the application of measures on board the ship designed to protect persons on board, cargo, cargo transport units, ship’s stores or the ship from the risk of a security incident.
Guide to Maritime Security and the ISPS Code, 2012 Edition
Ship Stabilizer
Stabilizer reducing the rolling of the ship.
Ship Store
Supplies, material and equipment for the navigation, maintenance and operation of a ship.
Ship to ship (STS)
Operation between two ships, in port or under way, to transfer bunker or cargo.
Shipowner
A person who owns ships or a share in a ship, owners can also act as operators of ships.
Shipper
An individual or a company with cargo to transport, an agent, working on a commission basis, who finds the cargo and books the shipping space or ship and then arranges the loading of the cargo in the port of shipment.
Shipping Agent
A person or firm who transacts all business in a port on behalf of shipowners or charterers.
Shipping Company
A company that owns or hires ships for the carriage of goods by sea.
Shipping Documents
Documents referring to the cargo carried on board ship (B/L, waybill, C/P, cargo manifest etc.)
Shipping Lane
A route through the sea which ships regularly sail and which can be defined by
Markings on a navigational chart.
Shipping Line
A regular line operated by ships.
Shipping Note
A note confirming the shipment of cargo on board ship.
Shipping Order
Forwarding order, order by the shipping company to a port company to load the cargo on board, shipper’s instructions to carrier for forwarding goods.
Ship’s Documents
Ship’s papers presented at all legal inspections of a ship.
Ships Heading Marker (SHM)
Virtual line on radar or ECDIS to show the heading of the vessel.
Shipwreck
The loss or destruction of a ship.
Shoal
Shallow area of water, a sandbank or sand bar exposed above the surface at low tide.
Shore Facility
A facility located on shore used for receiving vessels and transferring cargo to the vessels.
Shoreline
The edge of a sea, lake or wide river.
Shuttle tanker
Moderate sized tanker designed for the regular short-haul transport of oil between FPSO vessels or single point mooring buoys and coastal refinery terminals.
Sidelights
A green light on the starboard side and a red light on the port side, each showing an unbroken light over an arc of the horizon of 112.5°
COLREG
Sierra (S)
International Radiotelephony Spelling Alphabet, meaning: “I am operating astern propulsion.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Signal Flag
A flag of the International Code of Signals.
Single Up!
An order to leave or remain on one/single line on each mooring (e.g. One headline, one fwd spring, one aft spring and one sternline) as indicated by the Master or Pilot.
Slack
Not tight, loose (esp. A mooring line)
Slack Away
To ease the rope, pay out a rope.
Slack Water
Period of time when a body of water is between the tides.
Sleet
Rain combined with snow.
Sling
A rope, steel rope, chain or net for hoisting cargo and for holding it while being hoisted.
Slinging
Hoisting a cargo lot, handling a cargo lot.
Slippery
Characteristic of the surface of an object providing minimal or no traction.
Slop Tank
An aft cargo tank in which remains of oil cargo are stored in a tanker.
Slow Ahead!
A standard engine order indicating that the engine should operate at slow speed forward.
Slow Astern!
A standard engine order indicating that the engine should operate at slow speed astern.
Slow Down
To reduce speed.
Sludge
Is a substance that consists of residues from fuel, cargoes and tank washing water and has to be deposed in port facilities.
Solid bulk cargo
Any cargo, other than liquid or gas, consisting of a combination of particles, granules or any larger pieces of material generally uniform in composition, which is loaded directly into the cargo spaces of a ship without any intermediate form of containment.
SOLAS, Consolidated Edition 2014, IMO
Storm Warning
A national weather service warning of winds having speed of 48 knots and more.
Sound Alarm
A device for giving an audible alarm.
Sound Signal
An acoustic signal.
Sounding
Measuring the depth of water with a lead and line or measuring the level of liquid in a tank.
Spanner
A hand tool made of a thin piece of metal for turning nuts and bolts.
Spar Mark
A buoy with a spar (a seamark)
Spark Plug
A piece fitted into a cylinder to ignite the air-fuel mixture.
Special Area
A sea area where for recognized technical reasons in relation to its oceanographical and ecological condition and to the particular characteristic of its traffic the adoption of special mandatory methods for the prevention of sea pollution by oil is required.
Speed made good (SMG)
The actual average speed in knots which was maintained proceeding along the track to the ultimate destination or an intermediate point.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Speed of advance (SOA)
The speed intended to be made good along the track or the average speed in knots which must be maintained during a passage to arrive at a destination at an appointed time.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Speed of relative movement (SORM)
Speed relative to a reference point, usually itself in motion.
Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002
Speed over ground (SOG)
The true speed a ship makes over ground.
Speed through water (STW)
Speed of the vessel through the water with reference to a floating object.
Spherical Buoy
A seamark in a form of a ball.
Spill Valve
A relief valve for taking away excess fuel pressure.
Spillage
An accidental escape of oil or other fluid substances from a container, ship, pipe etc.
Spray
Fine particles of seawater spreading over the ship in heavy weather and seas.
Spring
One of the lines which tie the ship to the pier to prevent forward or aft motion of the ship.
Sprinkle
To scatter a liquid or powder in drops or particles.
Sprinkler
A device for sprinkling water to fight fire.
Squat effect
The phenomenon by which a vessel moving quickly through shallow water creates an area of lowered pressure under its keel that reduces the ship’s buoyancy, particularly at the bow. The reduced buoyancy causes the ship to squat” lower in the water than would ordinarily be expected, and thus its effective draught is increased.
https://en.m.wikipedia.org/wiki/Glossary_of_nautical_terms
Stable equilibrium
A stable equilibrium is achieved when the vertical position of G is lower than the position of transverse metacenter. When the ship heels to an angle the center of buoyancy shifts. The lever between the centre of gravity and the line of buoyancy now results in a righting moment that brings the ship back to its original upright position.
Stand By
Be ready to respond and act, be readily available.
Stand On
Maintain the same course and speed.
Standing Orders
Master’s orders to the officer of the watch which he or she must comply with.
Stand-On Vessel
(in COLREGS) A ship having the right of way.
Starboard
Right hand side of the ship.
Stationary
Being permanent, not moving.
Steady As She Goes!
An order to the helmsman to keep a vessel steady on its present heading.
Steady Course
Fixed course.
Steam Turbine
Turbine using steam as the primary source of propulsion.
Steamer
A vessel propelled by a steam engine.
Steer
To guide a ship by means of a rudder.
Steering
Directing the course of a vessel.
Steering Gear
A hydraulic device which operates and controls the rudder angle given by the helm.
Steering gear control system
Is the equipment by which orders are transmitted from the navigating bridge to the steering gear power units.
SOLAS, Consolidated Edition 2014, IMO
Steering Gear Pump
A device which helps to move the rudder blade.
Steering Gear Room
A room where the steering gear is located.
Stern
The after part of a vessel.
Stern anchor
An anchor carried at the stern.
Stern ramp
Stern mounted hinged platform located to permit the loading/discharge of vehicles aboard a Ro-Ro vessel.
Sternlight
A white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135°
COLREG
Sternline
A rope going from the aft part of a ship to the buoy or the pier to prevent the vessel of moving away from the pier.
Stevedorage
Charges for stowing and securing the cargo in the hold or on deck.
Stevedore
A person or company carrying out the stowing and securing of the cargo on board ship.
Steward/Stewardess
A person who serves passengers and crew on board ship.
Stores
Supplies, stock.
Storgage Tank
A tank at an oil terminal or vessel used for storing liquid cargo or fuel.
Storm
Winds of 48–55 knots (10 Beaufort Wind Scale)
Storm Bound
Stopped by the storm.
Stow
To pack or store cargo and put it in an intended place in the hold, on deck or on the terminal.
Stowage factor (SF)
Cubic space occupied by one ton of cargo.
Stowage System
Distribution of cargo in the ship’s holds and on deck.
Stowaway
A person on board a vessel without permission.
Strake
Continuous line of plates running from bow to stern that contributes to a vessel’s skin.
Field Manual No. 55-501, Department of the Army, Washington D.C., 1 December 1999
Stranded
Left aground, left ashore, grounded.
Stranding
Beaching, grounding, voluntary grounding.
Strap
A narrow strip of flexible material especially leather for fastening and holding things together.
Stream
A body of water flowing in a channel or river.
Stream Current
The main stream or current in the river.
Stress
Pressure, emphasis.
Stretch
To extend to the full length.
Stretcher
A kind of litter often canvas stretched on a frame for carrying the sick and the injured.
Strip
To clear out the residues of cargo or fuel from a container, tank, pipe etc.
Strip Out
To drain cargo or fuel tanks of the remaining cargo/fuel.
Stripping Line
A small pipe used to draining out the last few centimetres of cargo/oil in the cargo/fuel tanks.
Submarine
A ship that may be submerged under water, usually built for warfare and equipped with torpedoes and guided missiles.
Submerge
To go or sink below the surface of the water.
Suction
The process of drawing up water, oil, etc. By means of a pump.
Suezmax
The largest tanker which can pass through the Suez Canal fully loaded.
Sunken
Sunk under water, submerged.
Superstructure
All the permanent housing above the main deck including the forecastle, the bridge and the poop.
Supervise
To oversee work, manage.
Supervisor
Superintendent, a person who supervises work.
Supply
To give, to deliver, to provide what is needed or wanted.
Supply Vessel
A vessel bringing supplies of water, fuel and food to other ships.
Surge
A strong forward movement of a wave.
Surge Tank
A tank with a mass of water.
Surging
Ships fore and aft movement.
Survey Vessel
A ship carrying out hydrographic survey at sea.
Survey
Examination, a general description of a ship’s condition.
Surveyor
A person who carries out surveys of vessels and their equipment.
Survival craft
Is a craft capable of sustaining the lives of persons in distress from the time of abandoning the ship.
SOLAS, Consolidated Edition 2014, IMO
Survival Time
Expectancy to survive under unusual circumstances over a period of time.
Survivor
A person who survived a disaster.
Swaying
A movement where the whole ship moves bodily to port and then to starboard.
Swell
Condition of the surface caused by a distant wind system. The individual swell appears to be regular and smooth with considerable distance between rounded crests.
Swell direction
The direction from which a swell is moving. The direction toward which a swell is moving is called the down swell direction.
Swell velocity
Velocity with which the swells advance with relation to a fixed reference point,
Measured in knots.
Switch Over
To change from one power source to another, to change the VHF channel.
Swivel
(of anchor cable) A fastening device that allows the thing fastened to turn around freely in a full circle.
Take the Ullage
To measure the distance from the top of the cargo in the cargo tank to the deck level.
Tallyman
A person who tallies or counts packages or keeps accounts of cargo handling.
Tango (T)
International Radiotelephony Spelling Alphabet, meaning: “Keep clear of me; I am engaged in pair trawling.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Tank
A large receptacle or structure for holding liquids or gases, e.g. An oil tank.
Tank Container
A receptacle for the carriage of liquids or gases.
Tank Valve
A valve which controls the flow of the cargo into and out of a cargo tank.
Tanker
Is a cargo ship constructed or adapted for the carriage in bulk of liquid cargoes of an inflammable nature.
SOLAS, Consolidated Edition 2014, IMO
Tanker
A vessel designed for the carriage of liquid cargo in bulk.
Telegraph
Means of signalling from bridge to the engine room.
Tender
A supply vessel.
Tensile Strength
Ability to withstand loads, refers generally to metals.
Tension
(physics) A force that tends to produce an elongation of a body or structure.
Tension Winch
A winch which applies tension to mooring lines to keep them tight.
Terminal
A place for loading or discharging cargo.
Thermal protective aid
Is a bag or suit made of waterproof material with low thermal conductance.
SOLAS, Consolidated Edition 2014, IMO
Thrust block
A bearing arrangement, aft of the engine, by which the thrust of the propeller is transmitted to the ship.
Tidal
Subject to tides.
Tidal Current/Stream
Horizontal movement of the water as a result of tides.
Tidal Range
The difference between high and low water levels.
Tide
The periodic rise and fall of the ocean and its inlets, produced by the attraction of the moon and sun, occurring approx. Every 12 hours.
Tighten
To make tight or become tighter.
Tiller
A lever used to turn a rudder and steer a ship.
Timber
Lumber, the wood of trees suitable for building.
Timber Carrier
A vessel designed for the carriage of wood.
Time Charter
A contract for the hire of a vessel for a certain period of time.
Time Of Arrival (TOA)
The exact time of the ship’s arrival in port.
Time Of Berthing (TOB)
The exact time of the ship’s making fast to the quay.
Time Of Depature (TOD)
The exact time of leaving the berth.
Time to closest point of approach (TCPA)
Time remaining until the calculated CPA will be reached.
Time Zone
One of the 24 divisions of the globe approximately coinciding with meridians at successive hours from the observatory at Greenwich, England.
Tonnage
The capacity of a merchant vessel expressed either in units of weight as deadweight tons, or of volume as gross tons, primarily a space measurement.
Tonnes per Centimetre Immersion (TPC)
The weight needed to immerse the ship one more centimetre.
Top Dead Centre (TDC)
The exact top of the piston stroke in a reciprocating engine or pump.
Topmark
A mark placed on the top of seamarks and landmarks.
Topmark Buoy
A seamark surmounted by e.g. A cone, a sphere, a spar.
Top-Off
The act as a result of which the cargo tanks are loaded to a required ullage.
Top-Up
The act during which the oil level in a cargo tank is slowly brought up to its final ullage.
Torch
A small electric light powered by batteries.
Tornado
A very strong and destructive whirlwind.
Torque
The moment of a force causing rotation.
Tourism
The business of providing services such as transport, places to stay or entertainment for people who are on holiday.
Tow
To pull by a rope or chain, to pull a ship by tugboat.
Tow Boat
A tugboat.
Towage
Towing services or charges for towing.
Towing light
A yellow light having the same characteristics as the sternlight.
COLREG
Track
A path to be followed between one position and another.
Track made good
Is the single resultant course from the point of departure to point of arrival Nathaniel Bowditch: The American Practical Navigator, Bethesda., 2002″
Tracking
Observation of moving targets.
Trade
Exchange of goods, barter, commerce.
Trader
A trading vessel or a person engaged in trade.
Trading Vessel
A ship engaged in trade.
Traffic
Movement of ships, planes, vehicles, cargo, people.
Traffic Control
Monitoring the movement of ships, planes etc.
Traffic Control Vessel
A vessel carrying out traffic control, usually a Coast Guard vessel.
Traffic Line
A one-way route which vessels have to comply with within a traffic separation scheme.
Traffic Separation Line
A line separating the traffic lanes in which vessels are proceeding in opposite directions.
Traffic Separation Scheme (TSS)
A traffic separation scheme is an area in the sea where navigation of ships is highly regulated. Each TSS is designed to create lanes in the water with ships in a specific lane all travelling in the same direction.
https://en.wikipedia.org/wiki/List_of_traffic_separation_schemes
Traffic Separation Zone
A zone or line separating the traffic lanes in which vessels are proceeding in opposite or nearly opposite directions from the adjacent sea area.
Transfer
Convey, move from one place to another.
Transit
Passage of vessels through a canal or fairway or across the sea or ocean.
Transit Cargo
Cargo passing through one country/region with destination to another country/region.
Transmit
To send, forward, communicate.
Transshipment
Transfer of goods from one vessel to another outside harbours.
Transverse
Lying or placed across.
Transverse center of buoyancy (TCB)
Center of buoyancy in transverse direction.
Trawler
Fishing vessel designed for operation involving the towing of submerged nets.
Trim
Difference, or relationship, between the forward and after draughts of a floating vessel (ship is said to be trimmed by the head or stern according to which end is deeper in the water)
Trim by the Head
The ship’s bow is deeper in the water than the stern.
Trim by the Stern
The ship’s stern is deeper in the water than the bow.
Trip
A voyage, passage.
Tripping line
A line used for capsizing the sea anchor and hauling it in.
Truck
A vehicle for the carriage of goods.
True Bearing
A bearing relative to the geographical meridian.
True Course
A course whose bearing is given relative to the geographical meridian.
True Motion (TM)
Display setting on radar or ECDIS; depiction is stabilized to true geographical position of the area.
Trunk Piston
Having neither a crosshead nor a piston rod.
Tube
A long pipe, or cylinder, for housing something.
Tug
Small powerful and highly manoeuvrable vessel designed for towing, assisting and manoeuvring larger vessels in port or restricted waterways.
Tugmaster
A small truck for distributing ro-ro trailers in a ro-ro vessel.
Turbine Ship
A turbine-propelled vessel.
Turn
To cause to move around.
Turn in all standing
Go to bed without undressing.
Turn Off
To switch off.
Turn On
To switch on.
Turnaround time
The time it takes between the arrival of a vessel and it’s departure from port; frequently used as a measure of port efficiency.
Turnbuckles
Used to pull objects together. A link threaded on both ends of a short bar, one left handed, the other right handed.
Turn-Round of the Ship
The time spent by ships in port, the time needed for loading and/or discharge of a ship in the port.
Tween-deck
Intermediate deck within a cargo space above the lower hold and below the upper deck.
Twenty-foot Equivalent Unit (TEU)
Is an internationally standardized unit for the counting of ISO-containers of various sizes and for the description of the loading capacity of ships and the handling of terminals in container transport.
Typhoon
A violent tropical storm with strong winds which have a circular movement (found in the Indian or West Pacific Ocean)
Ullage
The distance from the top of a tank to the top of the cargo is called as ullage. It is the opposite of innage.
Ullage hatch
A small hinged opening on a tank for gauging or sampling cargo. The ullage is the distance from the top of this hatch to the top of the cargo.
Ullage opening
A small, covered opening in the top of a cargo tank or bunker tank through which measurements are made to determine the level of the liquid in the tank.
Ultra Large Crude Carriers (ULCC)
Vessel size (the largest shipping vessels in the world with a size more than 320,000 DWT)
Ultra low sulphur fuel oil (ULSFO)
Heavy fuel oil with a sulfure content < 0.1%. Sometimes used as a synonym to MDO but practically it means desulphurized IFO.
www.marquard-bahls.com/de/news-info/glossar
Ultra Low Sulphur Diesel (ULSD)
Diesel fuel with a sulphur content not higher than 10ppm.
Unballast/Deballast
Remove the ballast, pump out the ballast.
Uncharted
Not marked on the chart.
Under Keel Clearance (UKC)
Clearance between the sea floor and the ships hull.
Under the Lee
On the leeside.
Undermanned
Insufficient number of crew or shorthanded.
Underwater
Below the surface of water.
Underway
A vessel which is not at anchor, or made fast to the shore, or aground.
Uniform (U)
International Radiotelephony Spelling Alphabet, meaning: “You are running into danger.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Unitised Cargo
Cargo transported as a unit on a pallet or in a container.
Unlash
To remove the lashings, unfasten.
Unlit
Dark, not lighted, when the light characteristics of a buoy or a lighthouse are inoperative.
Unload
To discharge.
Unloader
Port equipment employed to unload ships carrying dry bulk cargo.
Unmanned Machinery Space (UMS)
Machinery space not requiring attendance of a watch engineer.
Unmoor
Removing the ropes that attach the ship to the shore.
Unsrew
To loosen a screw, unfasten.
Unstable equilibrium
An unstable equilibrium is caused when the vertical position of G is higher than the position of transverse metacenter. When the ship heels to an angle the center of buoyancy shifts to B. But the righting lever is now negative, or in other words, the moment created would result in creating further heel until a condition of stable equilibrium is reached. If the condition of stable equilibrium is not reached by the time the deck is not immersed, the ship is said to capsize.
Up anchor
Hoist or haul in the anchor.
Upper deck
A partial deck above the main deck.
Urgency Signal
A PAN PAN signal to be used to announce an urgency message requiring immediate action.
Valve
A device for controlling or stopping the flow of a liquid or gas through pipes or tubes.
Valve Body
Unmovable, outer part of a valve.
Vapor Header
A pipeline connected to the top of a cargo tank that channels the displaced tank vapours to a shoreside control system.
Vapour
Tiny, visible particles of a liquid flowing in the air.
Variable Currents
Currents which change their direction.
Variable Range Marker (VRM)
Virtual circle used for measuring the range or distance on the radar or ECDIS.
Variable Wind
Wind that permanently changes the direction from which it blows.
Veer
Change of wind direction clockwise, opposite of backing.
Vehicle spaces
Are cargo spaces intended for carriage of motor vehicles with fuel in their tanks for their own propulsion.
SOLAS, Consolidated Edition 2014, IMO
Velocity
Speed, rate of motion in a given direction, measured in meters per second, miles per hour, etc.
Velocity Made Good (VMG)
Speed made good in direction of the destination.
Ventilation System
System to provide mechanical ventilation to a compartment.
Ventilator
Installation for the intake or exhaust of ventilation air for enclosed spaces.
Venting Valve
A valve in a system used primarily to permit air to escape.
Vertical center of buoyancy (KB)
The height of the centre of buoyancy above the base plane denoted as vertical centre of buoyancy.
Vertical center of buoyancy (VCB)
Center of buoyancy in vertical direction.
Very Good Visibility
Visibility from 11–27 nautical miles in clear weather (8 visibility scale).
Very High Frequency (VHF)
Very high frequency refers to the radio frequency electromagnetic waves ranging from 30 to 300 MHz with corresponding wavelengths ranging from 1 m to tens of meters. VHF is widely used for military and local mobile radio transmissions, traffic control communications and in marine and air navigation systems.
Very High Sea
Waves from 7–10 metres (7 Douglas Sea Scale)
Very Large Crude Carriers (VLCC)
Vessel size (ranging between 180,000 to 320,000 DWT)
Very Large Ore Carrier (VLOC)
Vessel size (ranging more than 200.000 DWT)
Vessel
A craft designed for water transportation.
Vessel constrained by her draught
A power-driven vessel which, because of her draught in relation to the available depth and width of.vigable water, is severely restricted in her ability to deviate from the course she is following.
COLREG
Vessel engaged in fishing
Any vessel fishing with nets, lines, trawls or other fishing apparatus which restrict manoeuvrability.
COLREG
Vessel Experience Factor (VEF)
The historical difference in the ship and shore figures for a ship over a period of time. A Vessel Experience Factor is used to assess the validity of quantities delivered to the ship that are derived from shore measurements.
https://www.nepia.com/articles/vessel-experience-factor/
Vessel Monitoring System
Traffic control system.
Vessel not under command
A vessel which through some exceptional circumstance is unable to manoeuvre as required by the Rules and is therefore unable to keep out of the way of another vessel.
COLREG
Vessel restricted in her ability to manoeuvre
A vessel which from the nature of her work is restricted in her ability to manoeuvre as required by the Rules and is therefore unable to keep out of the way of another vessel.
COLREG
Vessel Traffic Service Station (VTS Station)
A station or centre providing services designed to improve safety and efficiency of vessel traffic and to protect the environment.
Vessel Traffic System (VTS)
A system for monitoring marine traffic established by harbour or port authorities, to control the traffic and improving the safety and efficiency of vessel traffic and protecting the environment. The system has the capability to interact with the traffic and respond to traffic situations in the VTS area.
Vicinity
The immediately surrounding area.
Victor (V)
International Radiotelephony Spelling Alphabet, meaning: “I require assistance.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Viscosity
Ability of a fluid to flow.
Visibility
A distance at which a given standard object can be seen and identified with a.ked eye.
Visor
A movable section of a bow, usually on ferries.
Void space
Enclosed space, which is often watertight closed and intentionally left empty; (e.g. Cofferdam).
Voyage Data Recorder (VDR)
A data recording system designed for all vessels required to comply with the IMO’s International Convention SOLAS Requirements (IMO Res.A.861(20)) in order to collect data from various sensors on board the vessel.
Voyage Plan (VP)
Plan where all important navigational information is summarised for the complete voyage.
Walkie-Talkie
Hand-held, portable, two-way radio transceiver, more formally known as a handheld transceiver.
Warning
Something that gives notice of caution.
Warping
Shifting of a vessel by means of warping winches.
Warping Buoy
A mooring buoy.
Waste
Unwanted matter or material of any type, often that which is left after useful substances or parts have been removed.
Waste Oil
Oil that has been used and has become unsuitable for its original purpose due to the presence of impurities or loss of original properties.
Waste Water
Unwanted used water.
Watch
To keep guard for a period of time, usually four or six hours on the bridge or in the engine room.
Watchkeeping
Attending to the working of a ship for a period of time, usually four or six hours.
Water Ballast
Water carried in the side and bottom tanks for stability purposes.
Water Ballast Tank
A side or double bottom tank filled with ballast water.
Waterline
Horizontal plane of the vessel at the surface of the water.
Waterlogged
A ship full of water but still afloat.
Waterproof
Watertight, water resistant, impervious to water.
Watertight bulkhead
A partition of plating reinforced where necessary with stiffering bars and capable of preventing the flow of water under pressure from one compartment to another.
Watertight compartment
A space or compartment whithin a ship having its top, bottom, and sides constructed in such a manner as to prevent the leakage of water into or from the space.
Watertight door
In closed position, no water will pass through this kind of door, caused by the construction of this type of door.
Waterway
A narrow area of water, such as a river or canal, which ships or boats can sail along.
Wave
The condition of the surface caused by local wind and characterized by irregularity, short distance between crests, whitecaps, and breaking motion.
Wave Amplitude
The difference between the crest and the trough of a wave.
Waypoint (WPT)
Planned position to be proceeded along.
Wear
Gradual change in quality due to constant use.
Weather
The state of the atmosphere with respect to wind, temperature, clouds, moisture, pressure, rain, snow, hail etc.
Weather Chart
A synoptic map showing the direction of winds and prevailing weather conditions for a given area at a certain time.
Weather deck
Is a deck which is completely exposed to the weather from above and from at least two sides.
SOLAS, Consolidated Edition 2014, IMO
Weather Forecast
(for shipping) Predicted weather conditions for a given sea area.
Weather Report
(for shipping) Summary of the weather conditions in an sea area.
Weathertight
Means that in any sea conditions water will not penetrate into the ship.
SOLAS, Consolidated Edition 2014, IMO
Wedge
A piece of hard material in a V-shaped edge.
Weigh Anchor
To heave up the anchor (clear from the seabed), lift.
Weld
To join pieces of metal by source of heating.
Well
A deep hole dug in the ground either to provide a supply of water or where there is a supply of oil or gas.
Wharf
A structure of wood, stone or concrete, built at the shore of a harbour for ships to lie alongside as for loading or unloading.
Wheel
Device for steering a vessel.
Wheelhouse
A part of the bridge of the ship where the navigation aids and controls are found.
Whiskey (W)
International Radiotelephony Spelling Alphabet, meaning: “I require medical assistance.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Whistle
To make a high-pitched sound.
Willy-Willy
A severe cyclone (off the coast of north-western Australia)
Winch
Device for pulling a rope or wire by the friction of the line around the winch body.
Wind
A current of air, sometimes of considerable force, moving generally horizontally from areas of high pressure to areas of low pressure.
Wind Bound
Kept from sailing by a wind from a wrong direction.
Wind Current
An air stream in a certain direction.
Wind Direction
The direction from which the wind blows.
Wind Energy
Energy created from the wind.
Wind Force
The power of wind measured in knots or m/sec and expressed in degrees of the Beaufort Wind Scale.
Wind Power
Power generated by wind forces.
Wind Pressure
Pressure of the wind on the ship’s sides.
Windward
Side of a ship exposed to the wind, also known as the weather side.
Wing
The overhanging part of the bridge deck or wheelhouse that, in general, extend it to the ship side and according to Regulations on navigation in Panama Canal Waters they shall extend to the maximum beam of the vessel, to have a clear view on the vessels side for safe navigation in ports, locks and other narrow passages.
Wing tank
Ballast or cargo tank adjacent to the hull side.
Winter Load Line
Maximum immersion of a vessel while transiting the winter load line zone.
Wiper
A general handyman in the engine room, but also doing jobs on deck.
Wire Rope
A rope made of strands of steel wire twisted together.
Work Shift
To work for a definite period before being replaced.
World-Wide Navigational Warning Service (WWNWS)
The internationally co-ordinated service for the promulgation of navigational warnings.
GMDSS Handbook, IMO, London 2001
Wreck
A vessel which has been destroyed or sunk or abandoned at sea.
X-Ray (X)
International Radiotelephony Spelling Alphabet, meaning: “Stop carrying out your intentions and watch for my signals.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Yacht
A sailing vessel used for private cruising or racing.
Yankee (Y)
International Radiotelephony Spelling Alphabet, meaning: “I am dragging my anchor.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
Yard
Shipyard or a unit of length in English speaking countries equal to 3 feet.
Yawing
Movement of vessel around the vertical axis; turning to port or starboard.
Zenith
The point on the celestial sphere vertically above a given position or observer.
Zero Emission
No emission.
Zero Visibility
No visibility.
Zone
An area that is distinguished for some purposes e.g. Inshore zone.
Zone Time
Standard time as applied at sea reckoned according to the system of time zones.
Zulu (Z)
International Radiotelephony Spelling Alphabet, meaning: “I require a tug.” When made by fishing vessels operating in close proximity on the fishing grounds it means: “I am shooting nets.”
International Code of Signals, national Imagery and Mapping Agency, 1969 Edition
ICT glossary
3D
3 Dimensional (3D)
5G
Fifth generation of cellular network technology.
Academic Free License (AFL)
Applies to any original work of authorship whose owner has placed the following notice immediately following the copyright notice for the Original Work.
Adaptive Coding and Modulation (ACM)
A modulation technique which consists of choosing the coding rate and modulation according to the experienced Signal-to-Noise ratio (SNR) in a dynamic manner.
Adaptive user interface (AUI)
A user interface which adapts its layout and elements to the needs of the user or context and is similarly alterable by each user.
https://ds.gpii.net/content/what-are-adaptive-user-interfaces
Additional Network Feature (ANF)
Algorithm
An algorithm is a finite sequence of well-defined computer-implementable instructions typically to solve a class of problems or to perform a computation.
https://www.khanacademy.org/computing/computer-science/algorithms
Application Programming Interface (API)
A set of routines, protocols and tools for building software applications.
Application Specific Messaging (ASM)
Messaging system of VDES
Artificial Intelligence (AI)
Abbreviation for Artificial Intelligence
Asynchronous Transfer Mode (ATM)
A switching technique used by telecommunication networks that uses asynchronous time-division multiplexing to encode data into small fixed-sized cells.
Augmented Reality (AR)
Interactive experience of a real-world environment where the objects that reside in the real-world are enhanced by computer-generated perceptual information.
Authentication Authorisation and Accounting (AAA)
Used to refer to a family of protocols that mediate network access.
https://searchsecurity.techtarget.com/definition/authentication-authorization-and-accounting
Automatic Identification System (AIS)
An automatic tracking system that uses transponders on ships and is used by vessel traffic services (VTS)
http://www.imo.org/en/OurWork/Safety/Navigation/Pages/AIS.aspx
Automatic Location Identifier (ALI)
An enhanced electronic location system that automatically relays a caller’s address when they call an emergency responder service such as 911 whether they call from a mobile phone or a land line.
Automatic Repeat reQuest (ARQ)
An error-control method for data transmission
Base Station (BS)
A fixed communications location and is part of a network’s wireless telephone system.
Bluetooth Low Energy (BLE)
Wireless personal area network technology designed and marketed by the Bluetooth Special Interest Group intended to provide considerably reduced power consumption and cost while maintaining a similar communication range.
Body Worn Video (BWV)
A wearable audio video or photographic recording system.
Call Session Control Functions (CSCF)
CSCF consists of several types of SIP servers and process all the SIP signalling in the network.
https://www.dialogic.com/glossary/call%20session%20control%20function
Charged Coupled Device (CCD)
A device for the movement of electrical charge usually from within the device to an area where the charge can be manipulated.
Clinical Decision Support System (CDSS)
A health information technology system that is designed to provide physicians and other health professionals with clinical decision support.
https://healthitanalytics.com/features/understanding-the-basics-of-clinical-decision-support-systems
Cognitive Radio (CR)
A radio that can be programmed and configured dynamically to use the best wireless channels in its vicinity.
Common Alerting Protocol (CAP)
An XML-based data format for exchanging public warnings and emergencies between alerting technologies.
Common Operating Picture (COP)
A single identical display of relevant shared by more than one Command
Common Operating Picture Software/Systems (COPSS)
A command and control tool that provides situational awareness enabling users to make accurate informed decisions based on current or planned activities under the Incident Command System.
Complex Event Processing (CEP)
CEP is event processing that combines data from multiple sources to infer events or patterns that suggest more complicated circumstances
https://flink.apache.org/news/2016/04/06/cep-monitoring.html
Computer Aided Dispatch (CAD)
A method of dispatching taxi cabs couriers field service technicians mass transit vehicles or emergency services assisted by computer.
Computer vision
Computer vision is an interdisciplinary scientific field that deals with how computers can be made to gain high-level understanding from digital images or videos.
Constraint Programming (CP)
A programming paradigm wherein relations between variables are stated in the form of constraints.
http://www.constraint.org/en/intro.html
Create Read Update Delete (CRUD)
The four basic functions of persistent storage.
Database (DB)
A structured set of data held in a computer
DataBase Management System (DBMS)
The database management system (DBMS) is the software that interacts with end users applications and the database itself to capture and analyze the data.
Decision Support System (DSS)
A set of related computer programs and the data required to assist with analysis and decision-making.
Decode-and-Forward (DF)
DF is a protocol defined for wireless cooperative communications.
Deep Neural Network (DNN)
Description of Work (DoW)
DevOpS
DevOps is a set of software development practices that combine software development (Dev) and information-technology operations (Ops) to shorten the systems-development life cycle while delivering featuresfixesand updates frequently in close alignment with business objectives.
Direct Mode Operation (DMO)
Term used to describe the ability of radio terminals to communicate directly with each other.
https://tcca.info/tetra/direct-mode-operation-dmo/
Discrete Event Systems (DES)
A discrete-state event-driven system of which the state evolution depends entirely on the occurrence of asynchronous discrete events over time.
Distributed Decision Making (DDM)
A decision-making process where several people are involved to reach a single decision.
https://www.igi-global.com/dictionary/software-agents/8044
Docker
Docker is a tool that focuses on improving the deployment flow for applications. It is based on the deployment of isolated containers that contain all the necessary libraries and files necessary to run specific parts of the application.
Docker container
A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another. A Docker container image is a lightweight standalone executable package of software that includes everything needed to run an application code, runtime system tools, system libraries and settings.
https://www.docker.com/resources/what-container
Elasticsearch
Elasticsearch is a distributed RESTful search and analytics engine that centrally stores your data so you can search index and analyze data of all shapes and sizes.
https://www.elastic.co/es/products/elasticsearch
Elasticsearch Logstash Kibana (ELK)
Stack of applications that collaborate with one another such as databases data visualizers monitoring tools.
Electronic Medical Record (EMR)
Electronically stored health information in a digital format
Electronic Triage Tag (ETT)
A digital version of the classics triage tags
Emergency Data Exchange Language (EDXL)
A suite of XML-based messaging standards that facilitate emergency information sharing between government entities and the full range of emergency-related organizations.
Emergency Management Information System (EMIS)
A computer database for disaster response that provides graphical real-time information to responders.
Emergency Management Systems (EMS)
The tool with which to implement the management of an emergency.
Emergency medical dispatch (EMD)
Refers to a system that enhances services provided by Public Safety Answering Point (emergency) call takers
Emergency Medical Service (EMS)
Emergency services which treat illnesses and injuries that require an urgent medical response.
Emergency Operations Centre (EOC)
A central command and control facility responsible for carrying out the principles of emergency preparedness and emergency management.
Emergency Response Units (ERU)
A standardised package of trained personnel and modules of equipment ready to be deployed at short notice.
Emergency Services IP networks (ESInet)
A managed Internet Protocol (IP) network that is used for emergency services communications and which can be shared by all public safety agencies.
Emergency Telecommunications (EMTEL)
Any system that is organized for the primary purpose of supporting one-way and two-way communication of emergency information between both individuals and groups of individuals.
Enterprise Resources Planning (ERP)
The integrated management of main business processes often in real-time and mediated by software and technology.
European Surveillance System (EUROSUR)
A highly flexible metadata-driven system for collection validation cleaning analysis and dissemination of data
https://ecdc.europa.eu/en/publications-data/european-surveillance-system-tessy
Evolutionary Algorithm (EA)
A subset of evolutionary computation a generic population-based metaheuristic optimization algorithm
eXtensible Markup Language (XML)
Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable
Field Commander (FC)
A person in charge to coordinate all activities.
File Transfer Protocol (FTP)
A standard network protocol used for the transfer of computer files between a client and server on a computer network.
Functional Requirements (FR)
A functional requirement defines a function of a system or its component where a function is described as a specification of behaviour between outputs and inputs.
Geographic Information Systems (GIS)
A geographic information system (GIS) is a system designed to capture store manipulate analyze manage and present spatial or geographic data. GIS applications are tools that allow users to create interactive queries (user-created searches) analyze spatial information edit data in maps and present the results of all these operations.[1][2] GIS (more commonly GIScience) sometimes refers to geographic information science (GIScience)the science underlying geographic concepts applications and systems.
Global Positioning System (GPS)
A GPS navigation device, GPS receiver or simply GPS is a device that is capable of receiving information from GPS satellites and then to calculate the device’s geographical position.
Global System for Mobile (GSM)
GSM (Global System for Mobile communication) is a digital mobile network that is widely used by mobile phone users. GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephony technologies TDMAGSM and code-division multiple access.
Hadoop Distributed File System (HDFS)
The Hadoop Distributed File System (HDFS) is a sub-project of the Apache Hadoop project. This Apache Software Foundation project is designed to provide a fault-tolerant file system designed to run on commodity hardware.
https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html
HyperText Markup Language (HTML)
HTML (Hypertext Markup Language) is a text-based approach to describing how content contained within an HTML file is structured. This markup tells a web browser how to display the text, images and other forms of multimedia on a webpage.
HyperText Transfer Protocol (HTTP)
HTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted and what actions Web servers and browsers should take in response to various commands.
Information and Communication Technology (ICT)
ICT refers to technologies that provide access to information through telecommunications. It is similar to Information Technology (IT)but focuses primarily on communication technologies. This includes the Internet, wireless networks, cell phones and other communication mediums.
Information Technology (IT)
Information technology (IT) is the use of any computers, storage, networking and other physical devices, infrastructure and processes to create process, store secure and exchange all forms of electronic data. Typically, IT is used in the context of enterprise operations as opposed to personal or entertainment technologies. The commercial use of IT encompasses both computer technology and telephony.
Infrastructure as a Service (IaaS)
Infrastructure as a service (IaaS) is a form of cloud computing that provides virtualized computing resources over the internet.
International Organization for Standardization (ISO)
ISO (International Organization for Standardization) is a worldwide federation of national standards bodies. ISO is a nongovernmental organization that comprises standards bodies from more than 160 countries with one standards body representing each member country.
International Telecommunication Union (ITU)
Internet of Things (IoT)
The Internet of things (IoT) is the extension of Internet connectivity into physical devices and everyday objects. Embedded with electronics, Internet connectivity, and other forms of hardware (such as sensors)these devices can communicate and interact with others over the Internet and they can be remotely monitored and controlled.
Internet Protocol (IP)
The Internet Protocol (IP) is the method or protocol by which data is sent from one computer to another on the Internet. Each computer (known as a host) on the Internet has at least one IP address that uniquely identifies it from all other computers on the Internet.
Internet Technical Committee (ITC)
The Internet Technical Committee (ITC) is a joint committee of the Internet Society (ISOC) and the IEEE Communications Society (ComSoc).
JavaScript (JS)
JavaScript is a programming language commonly used in web development. It was originally developed by Netscape as a means to add dynamic and interactive elements to websites. While JavaScript is influenced by Javathe syntax is more similar to C and is based on ECMAScripta scripting language developed by Sun Microsystems.
JavaScript Object Notation for Linked Data (JSON)
JavaScript Object Notation (JSON) is an open-standard file format that uses human-readable text to transmit data objects consisting of attribute–value pairs and array data types (or any other serializable value). It is a very common data format used for asynchronous browser-server communication, including as a replacement for XML in some AJAX-style systems.
Kibana
Kibana allows visualizing and analyzing the data stored in Elasticsearch.
Line of Sight (LoS)
Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves travel in a direct path from the source to the receiver.
Local Area Network (LAN)
A local area network (LAN) is a group of computers and associated devices that share a common communications line or wireless link to a server.
Logstash
Logstash can dynamically unify data from disparate sources and normalize the data into destinations of your choice. Cleanse and democratize all your data for diverse advanced downstream analytics and visualization use cases.
https://www.elastic.co/guide/en/logstash/current/introduction.html
Long Short-Term Memory (LSTM)
Long short-term memory (LSTM) is an artificial recurrent neural network (RNN) architecture used in the field of deep learning. Unlike standard feedforward neural networks, LSTM has feedback connections.
Long Term Evolution (4G/LTE)
Standard for wireless broadband communication for mobile devices and data terminalsbased on the GSM/EDGE and UMTS/HSPA technologies
Machine Learning (ML)
Machine learning (ML) is the scientific study of algorithms and statistical models that computer systems use in order to perform a specific task effectively without using explicit instructionsrelying on patterns and inference instead.
https://www.digitalocean.com/community/tutorials/an-introduction-to-machine-learning
Microservices
Microservices are a software development technique – a variant of the service-oriented architecture (SOA) structural style – that arranges an application as a collection of loosely coupled services.[1] In a microservices architecture, services are fine-grained and the protocols are lightweight.
MongoDB
MongoDB is a general purpose, document-based, distributed database built for modern application developers and for the cloud era. No database is more productive to use.
Neural Network (NN)
Systems that “learn” to perform tasks by considering examples generally without being programmed with task-specific rules.
On-Site Operations Coordination Centre/ “Virtual” (OSOCC)
The On-Site Operations Coordination Centre (OSOCC) is a rapid response tool that provides a platform for the coordination of international response activities in the immediate aftermath of a sudden onset emergency or a rapid change in a complex emergency.
https://reliefweb.int/report/world/site-operations-coordination-centre-osocc-guidelines-2018
Open Authentication protocol (OAuth)
OAuth (Open Authorization) is an open standard for token-based authentication and authorization on the Internet.
Open Programming Language (OPL)
Open Programming Language (OPL) is an embedded programming language for portable devices that run the Symbian Operating System.
Open Services Gateway initiative (OSGi)
The OSGi Alliance, formerly known as the Open Services Gateway initiative is an open standards organization founded in March 1999 that originally specified and continues to maintain the OSGi standard
Open source software (OSS)
Operations Support Systems (OSS)or Operational Support Systems in British usage,[1] are computer systems used by telecommunications service providers to manage their networks (e.g. telephone networks). They support management functions such as network inventory service, provisioning network configuration and fault management.
Open Street Map (OSM)
OpenStreetMap (OSM) is a collaborative project to create a free editable map of the world.
https://www.openstreetmap.org/
Orthogonal variable spreading fact codes (OVSF)
Orthogonal variable spreading factor (OVSF) is an implementation of code division multiple access (CDMA) where before each signal is transmitted, the signal is spread over a wide spectrum range through the use of a user’s code.
Packet Data Networks (PDN)
In communications, a PDN is a circuit- or packet-switched network that is available to the public and that can transmit data in digital form.
Peripheral Equipment Interface (PEI)
Peripheral equipment (also called input and output devices) connects a computer to other things.
https://www.etsi.org/deliver/etsi_en/300300_300399/30039205/01.01.01_60/en_30039205v010101p.pdf
Personal Computer (PC)
Point Of Interest (POI)
A point of interest or POI is a specific point location that someone may find useful or interesting.
https://www.ceinsys.com/blog/point-of-interest-really-necessary-for-mapping
Point-in-Time (PiT)
Point-in-time recovery (PITR) in the context of computers involves systems whereby an administrator can restore or recover a set of data or a particular setting from a time in the past.
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/PointInTimeRecovery_Howitworks.html
Policy and Charging Control (PCC)
Policy and Charging Rules Function (PCRF) is the software node designated in real-time to determine policy rules in a multimedia network.
Preferred Reporting of Items for Systematic reviews and Meta-Analyses (PRISMA)
PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) is an evidence-based minimum set of items aimed at helping authors to report a wide array of systematic reviews and meta-analyses that assess the benefits and harms of a health care intervention.
http://www.prisma-statement.org
Private Integrated Services Networks (PISN)
In computer networkingIntServ or integrated services is an architecture that specifies the elements to guarantee quality of service (QoS) on networks.
https://www.ecma-international.org/publications/files/ECMA-ST/Ecma-232.pdf
Public Safety Answering Points (PSAP)
A public-safety answering point (PSAP)sometimes called “public-safety access point”is a call center in Canada and the United States responsible for answering calls to an emergency telephone number for policefirefightingand ambulance services.
Radio-frequency IDentification (RFID)
Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects.
https://internetofthingsagenda.techtarget.com/definition/RFID-radio-frequency-identification
Rancher
Rancher is a complete software stack for teams adopting containers. It addresses the operational and security challenges of managing multiple Kubernetes clusterswhile providing DevOps teams with integrated tools for running containerized workloads.
Rapid Application Development (RAD)
Rapid-application development (RAD)also called Rapid-application building (RAB)is both a general term used to refer to adaptive software development approaches as well as the name for James Martin’s approach to rapid development.
https://www.lucidchart.com/blog/rapid-application-development-methodology
Recovery Time Objective (RTO)
Recovery Point Objective (RPO) and Recovery Time Objective (RTO) are two of the most important parameters of a disaster recovery or data protection plan.
https://whatis.techtarget.com/definition/recovery-time-objective-RTO
Recurrent Neural Network (RNN)
A recurrent neural network (RNN) is a class of artificial neural networks where connections between nodes form a directed graph along a temporal sequence. This allows it to exhibit temporal dynamic behaviour.
Role-Based Access Control (RBAC)
In computer systems security role-based access control (RBAC)[1][2] or role-based security[3] is an approach to restricting system access to authorized users.
https://digitalguardian.com/blog/what-role-based-access-control-rbac-examples-benefits-and-more
Search and Rescue (SAR)
Search and rescue (SAR) is the search for and provision of aid to people who are in distress or imminent danger.
http://www.concorde-project.eu
Sensor
A sensor is a device, module, machine or subsystem whose purpose is to detect events or changes in its environment and send the information to some data sync.
Service Orchestration
Service orchestration is the execution of the operational and functional processes involved in designing, creating and delivering an end-to-end service.
https://d2iq.com/blog/service-orchestration-what-it-is-and-why-you-need-it
Service Oriented Architecture (SOA)
Service-oriented architecture (SOA) is a style of software design where services are provided to the other components by application components through a communication protocol over a network
Service Request Form (SRF)
A Service Request Definition (Requestable Service) is the top level of a service in Service Request Management.
https://www.jotform.com/form-templates/it-service-request-form
Session Description Protocol (SDP)
The Session Description Protocol (SDP) is a format for describing streaming media communications parameters.
https://tools.ietf.org/html/rfc4566
Severe Acute Respiratory Syndrome (SARS)
Severe acute respiratory syndrome (SARS) is a viral respiratory disease of zoonotic origin caused by the SARS coronavirus (SARS-CoV).
https://medlineplus.gov/ency/article/007192.htm
Simple Object Access Protocol (SOAP)
SOAP (abbreviation for Simple Object Access Protocol) is a messaging protocol specification for exchanging structured information in the implementation of web services in computer networks.
https://searchmicroservices.techtarget.com/definition/SOAP-Simple-Object-Access-Protocol
Software Development Kit (SDK)
A software development kit (SDK or devkit) is typically a set of software development tools that allows the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system or similar development platform.
https://www.techopedia.com/definition/3878/software-development-kit-sdk
Software-Defined Radio (SDR)
Software-defined radio (SDR) is a radio communication system where components that have been typically implemented in hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors etc.) are instead implemented by means of software on a personal computer or embedded system.
SparkSQL
Spark SQL is a Spark module for structured data processing. It provides a programming abstraction called DataFrames and can also act as a distributed SQL query engine.
SPARQL protocol and RDF Query Language (SPARQL)
SPARQL (pronounced “sparkle”a recursive acronym[2] for SPARQL Protocol and RDF Query Language) is an RDF query language that is a semantic query language for databases, able to retrieve and manipulate data stored in Resource Description Framework (RDF) format.
https://www.w3.org/TR/rdf-sparql-protocol
Spatial Data Infrastructure (SDI)
A spatial data infrastructure (SDI) is a data infrastructure implementing a framework of geographic data, metadata, users and tools that are interactively connected in order to use spatial data in an efficient and flexible way.
https://www.esri.com/library/brochures/pdfs/spatial-data-infrastructure.pdf
Stochastic Gradient Descent (SGD)
Stochastic gradient descent (often abbreviated SGD) is an iterative method for optimizing an objective function with suitable smoothness properties (e.g. differentiable or subdifferentiable).
Structured Query Language (SQL)
SQL is a standardized query language for requesting information from a database.
TensorFlow
TensorFlow is an end-to-end open source platform for machine learning. It has a comprehensive, flexible ecosystem of tools, libraries and community resources that lets researchers push the state-of-the-art in ML and developers easily build and deploy ML powered applications.
Ultra High Frequency (UHF)
Radio frequencies in the range between 300 MHz and 3 GHz
Unified Modeling Language (UML)
The Unified Modelling Language (UML) is a general-purpose, developmental, modelling language in the field of software engineering that is intended to provide a standard way to visualize the design of a system.
https://www.visual-paradigm.com/guide/uml-unified-modeling-language/what-is-uml
Universal Mobile Telecommunication System (UMTS)
Third generation mobile cellular system for networks based on the GSM standard
https://www.3gpp.org/technologies/keywords-acronyms/103-umts
Universal Resource Identifier (URI)
A Uniform Resource Identifier (URI) is a string of characters that unambiguously identifies a particular resource.
https://www.w3.org/Addressing/URL/URI_Overview.html
Universal Serial Bus (USB)
Industry standard that establishes specifications for cables and connectors and protocols for connectioncommunication and power supply between computersperipheral devices and other computers
Use-Case (UC)
In software and systems engineeringa use case is a list of actions or event steps typically defining the interactions between a role (known in the Unified Modeling Language (UML) as an actor) and a system to achieve a goal.
https://www.techopedia.com/definition/25813/use-case
User Equipment (UE)
User equipment (UE) is any device used directly by an end-user to communicate.
https://www.definitions.net/definition/User%20Equipment
User Interface (UI)
https://searchmicroservices.techtarget.com/definition/user-interface-UI
User Requirement (UR)
The user requirement(s) or user requirement(s) specification (URS) is a document usually used in software engineering that specifies what the user expects the software to be able to do.
http://www.ofnisystems.com/services/validation/user-requirement-specifications/
User-Centred Design (UCD)
User-centered design (UCD) or user-driven development (UDD) is a framework of processes (not restricted to interfaces or technologies) in which usability goals, user characteristics, environment tasks and workflow of a product, service or process are given extensive attention at each stage of the design process.
Very High Frequency (VHF)
Radio frequencies in the range between 30 MHz and 300 MHz. In the VHF band the signal is capable of propagating over a long distance even when the direct LoS path is blocked by the earth surface. Beyond the horizon the diffraction effect weakens and the troposcatter effect strengthens and make the VHF band an attractive frequency band for long-range communications.
VHF Data Exchange (VDE)
Beyond AIS and ASDMVDES has a third subsystem called VDE, which allows higher rate communications and is highly flexible to be able to support a variety of services in the future.
Virtual Machine (VM)
A Virtual Machine is an emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer.
Web Desktop (WD)
A web desktop or webtop is a desktop environment embedded in a web browser or similar client application.
Web Services Description Language (WSDL)
The Web Services Description Language (WSDL) is an XML-based interface description language that is used for describing the functionality offered by a web service.
https://www.w3schools.com/xml/xml_wsdl.asp
Wireless Information System for Emergency Responders (WISER)
Wireless Information System for Emergency Responders (WISER) is a system to assist first responders in identification of hazardous materials during a response.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1324782
Wireless Internet Information System for Medical Response in Disasters (WIISARD)
The Wireless Internet Information System for Medical Response in Disasters (WIISARD) explores the use of scalable wireless networks to facilitate medical care at the site of a disaster.
http://www.wizardink.com/category/designs/first-responder
Wireless Networking technology (Not exactly an abbreviation) (WiFi)
Wireless Priority Service (WPS)
Wireless Priority Service (WPS) is method of improving connection capabilities for a limited number of authorized national security and emergency preparedness (NS/EP) cell phone users.
https://www.dhs.gov/cisa/wireless-priority-service-wps
Work Package (WP)
World Health Organisation (WHO)
The World Health Organization (WHO) is a specialized agency of the United Nations that is concerned with international public health.
World Wide Web (WWW)
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