Glossary

Maritime glossary, terms beginning with A (page 3)

All maritime glossary terms that begin with the letter A, drawn from every subject section. 3739 entries.

Showing 250 of 3739 terms (page 3 of 15).

ACE Quantum Chemical Tankers X135. Chemical Tanker Operators and IBC Code Cargoes: Singapore-based commercial pool operator managing IMO Type 2 stainless-steel parcel tankers in the 19,000 to 25,000 dwt range, primarily trading intra-Asia and Middle East Gulf to India routes.
ACEP C3. Logistics, freight forwarding and multimodal trade: Approved Continuous Examination Programme for CSC container inspection.
ACEP (Approved Continuous Examination Program) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: A container inspection program referenced in tanker vetting when the vessel carries tank containers, complementing periodic CSC plate validation.
ACEP Cruise Ship Medicine Section X36. Shipboard Medical, Telemedicine and Seafarer Health: American College of Emergency Physicians special-interest section publishing health-care standards for cruise ship medical facilities.
ACEP Number X83. ISO Container Manufacturing and Leasing: Identifier assigned by a flag administration to an owner's approved examination program, marked on the CSC plate.
Acer X134. LNG and LPG Carrier Operators and Containment Systems: LNG carrier of 145,000 m3 with GTT NO96 membrane, operated by NYK Line for long term Japanese utility contracts.
Acerinox X92. Marine Steel Suppliers and Shipbuilding Plate: Spanish stainless steel group with production at Los Barrios, supplier of stainless plate for chemical tanker construction.
Acetaldehyde X75. IMDG Code, Classes, Packing and Segregation: UN 1089, Class 3 flammable liquid Packing Group I, with flash point below minus 38 degrees Celsius.
Acetaminophen X36. Shipboard Medical, Telemedicine and Seafarer Health: US English term for paracetamol; oral analgesic and antipyretic stocked in all IMGS ship categories.
Acetic Acid X93. IBC Code and Chemical Tanker Operations: Carboxylic acid CH3COOH transported under the IBC Code as a Type 3 ship cargo, MARPOL Annex II Category Z, requiring stainless steel 316L tank construction due to severe corrosion of carbon steel.
Acetic Acid (Food Grade) X120. Marine Catering, Provisions and Ship Chandlers: Provisioning vinegar concentrate listed under IMPA 55 (provisions) for galley pickling and cleaning use.
Acetic Acid Glacial X75. IMDG Code, Classes, Packing and Segregation: UN 2789, Class 8 corrosive with Class 3 subsidiary risk, Packing Group II, segregation group SGG1 acids.
Acetic Anhydride X93. IBC Code and Chemical Tanker Operations: Organic anhydride (CH3CO)2O assigned UN 1715, carried as a Type 2 ship cargo, Category Y under MARPOL Annex II, reactive with water and requiring dry inert atmosphere.
Acetone X1. Cargo Science, Commodities and Cargo Care: IBC Code noxious liquid (Chapter 17), flammable solvent carried in chemical tankers.
Acetone Barge X103. US Inland Waterway Towing and Barge: An inland chemical tank barge configured to carry acetone, typically under nitrogen pad and with vapor control fittings.
Acetone Cyanohydrin X93. IBC Code and Chemical Tanker Operations: Highly toxic organic cyanohydrin requiring Type 1 ship carriage under the IBC Code due to extreme inhalation toxicity and Category Y status.
Acetonitrile X75. IMDG Code, Classes, Packing and Segregation: UN 1648, Class 3 flammable liquid Packing Group II with toxic hazard noted in EmS schedules.
Acetyl Chloride X75. IMDG Code, Classes, Packing and Segregation: UN 1717, Class 3 with Class 8 subsidiary risk, water reactive and assigned segregation away from foodstuffs.
Acetylene X1. Cargo Science, Commodities and Cargo Care: Class 2.1 flammable gas, generally not shipped in bulk by sea due to instability above modest pressures.
Acetylene Dissolved X75. IMDG Code, Classes, Packing and Segregation: UN 1001, Class 2.1 flammable gas in porous mass with acetone, IMDG stowage category E.
Acetylene torch cutting X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: The primary thermal method used at most South Asian recycling yards to dismantle hull sections into manageable plates.
Achilleas, The [2008] UKHL 48 X143. Landmark Maritime Law Cases and Doctrines: House of Lords decision narrowing Hadley v Baxendale by introducing assumption of responsibility as a remoteness control on damages for late redelivery of a time chartered vessel.
ACI X6. Container, Intermodal and Trade Codes: Advance Commercial Information, Canada Border Services Agency pre-arrival cargo reporting.
Acico Yachts X125. Superyacht Industry, Builders and Brokers: Kuwaiti owned holding that previously owned the Turquoise Yachts brand in Istanbul.
Acid X75. IMDG Code, Classes, Packing and Segregation: Substance that releases hydrogen ions in water, grouped in IMDG segregation group SGG1 with cross hazard considerations.
Acid Cargoes X1. Cargo Science, Commodities and Cargo Care: Corrosive liquid bulks (sulfuric, phosphoric, hydrochloric) requiring resistant tank coatings and segregation.
Acid Cleaning X63. Marine Auxiliary Machinery and Pumps: Chemical descaling of boiler water side, evaporator tubes, or heat exchanger surfaces using inhibited acid.
Acid jetty X15. Ports, Terminals and Stevedoring: dedicated berth for handling sulfuric, phosphoric, or other acidic liquid cargoes.
Acid neutralization X61. Marine Lubricants and Cylinder Oils: Function of alkaline additives in cylinder oil that react with sulfuric acid formed from fuel sulfur combustion to prevent corrosive liner wear.
Acid number X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Milligrams of KOH required to neutralize the acids in one gram of oil; measured per ASTM D664 for lubricants.
Acid Sensitive Material X75. IMDG Code, Classes, Packing and Segregation: Cargo that reacts dangerously with acids and must be segregated under IMDG 7.2.4 from SGG1 substances.
Acid Wash X69. EGCS Scrubbers, SCR and Marine Air Emissions: Cleaning procedure that removes scale and sulfate deposits from scrubber packing, nozzles and demister surfaces.
Acid Wash Test X5. Marine Surveying and Inspection: Cargo quality test for residual hydrocarbons on tanker tank surfaces after cleaning.
Acidic Scrubbing of Ammonia Vent X140. Ammonia as Marine Fuel and Hydrogen Shipping: Bunkering safety control using citric or sulfuric acid loops to neutralize NH3 vapor releases during purging and disconnection.
Acidification X10. Marine Biology, Fisheries and Oceanography: Decrease in seawater pH driven primarily by uptake of atmospheric carbon dioxide.
Acidification (Coastal) D3. Marine environmental science, pollution and conservation: pH decline in coastal waters from CO2 uptake and nutrient inputs.
Ackerman Tug X60. Marine Salvage and Wreck Removal: Generic term sometimes used for harbor tugs adapted for emergency response and light salvage support work.
Acknowledgement of receipt X71. Shipbrokers and Brokerage Firms: Broker confirmation that an offer, counter, or recap has been received by the counterparty's broker channel.
Acknowledgment of Receipt X86. Port Agency, Husbandry and Disbursement: Written confirmation by the master that cash, documents, or stores have been delivered on board by the agent.
ACM Shipping X71. Shipbrokers and Brokerage Firms: London shipbroker founded in 1982 that merged with Braemar Shipping Services in 2013 to form Braemar ACM.
ACO X80. Maritime Search and Rescue Coordination: Aircraft Coordinator designated by the SMC to deconflict multiple aircraft operating in a SAR incident.
ACO Brief X80. Maritime Search and Rescue Coordination: Standardized pre-mission briefing delivered by the Aircraft Coordinator covering search area, altitudes, and communications.
ACoP X82. Saturation Diving and Offshore Diving Operations: Approved Code of Practice issued by the UK HSE for commercial diving operations.
ACOPS X13. Marine Salvage and Wreck Removal: Advisory Committee on Protection of the Sea, UK NGO tracking pollution and salvage incidents.
Acorn Project X57. Ocean Energy Beyond Wind: Proposed carbon capture and storage project in northeast Scotland that would reuse the Goldeneye pipeline to inject CO2 into depleted gas reservoirs and saline aquifers beneath the North Sea.
Acoustic Deterrent Device (ADD) D3. Marine environmental science, pollution and conservation: Underwater sound device to reduce marine mammal bycatch or interactions.
Acoustic Doppler current profiler X59. Offshore Wind O&M, CTVs and SOVs: Hull mounted instrument used during wind farm site surveys to measure water column current profiles for vessel approach planning.
Acoustic Doppler Current Profiler (ADCP) D1. Physical and chemical oceanography and marine meteorology: Instrument that measures water current velocities over a depth range using the Doppler effect.
Acoustic Doppler Current Profiler (Fisheries Use) X87. Fishing Vessels and Fisheries Management: Hull-mounted instrument used by research and pelagic vessels to characterize water column flow relevant to fish behavior.
Acoustic Emission (AE) Testing X96. Hull Integrity Monitoring and Strain Gauges: Passive non-destructive technique that detects elastic waves from crack growth or yielding in hull plating and welds.
Acoustic emission inspection B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: NDT method detecting active crack growth.
Acoustic emission monitoring B2. Marine Engineering: NDT/condition-monitoring technique for crack and bearing faults.
Acoustic Emission Testing Surveyor X43. Marine Surveying and Warranty Surveying: A non-destructive testing specialist who monitors high-frequency stress waves in tanks, pipelines, and pressure vessels during in-service inspection.
Acoustic enclosure X19. Engine Room Watchkeeping and UMS Operations: Sound attenuating housing fitted around generator engines and purifiers to limit ECR noise exposure.
Acoustic Hailing Device X22. Piracy, Maritime Security and Armed Protection: Long range directional speaker (LRAD) used to warn approaching skiffs at distances beyond small arms range.
Acoustic Insulation X50. Ship Recycling, Demolition and Hong Kong Convention: Engine room and accommodation block sound-attenuating material that may historically contain asbestos or man-made mineral fibers, sampled during the Initial Inventory of Hazardous Materials survey.
Acoustic Intercept Receiver X91. Submarines and Submarine Cable Systems: Submarine sonar subsystem that passively detects pulses from hostile active sonars and torpedo seekers.
Acoustic mine X77. Naval Mine Warfare and Mine Countermeasures: An influence mine triggered by the underwater radiated noise signature of a passing vessel, detected via hydrophones in the mine casing.
Acoustic Modem X25. Maritime Cybersecurity, OT and IT: Underwater communications device used by AUVs and subsea assets, an emerging cyber attack surface.
Acoustic positioning X65. ROVs, AUVs, USVs and Marine Robotics: Family of subsea localization techniques including USBL, SBL and LBL that infer vehicle position from travel time of acoustic pings.
Acoustic release X10. Marine Biology, Fisheries and Oceanography: Mooring component that frees a subsurface package on receipt of a coded sonar signal.
Acoustic signature X38. Propellers, Stern Gear and Shaft Lines: Underwater noise spectrum radiated by the propeller and shaft line, governed by cavitation, blade rate, and shaft eccentricity.
Acoustic Survey Vessel X87. Fishing Vessels and Fisheries Management: Research vessel equipped with calibrated echosounders for estimating pelagic biomass, operated by agencies such as IMR Bergen and IEO Vigo.
Acoustic sweep X77. Naval Mine Warfare and Mine Countermeasures: A minesweeping method that emits underwater sound at frequencies matching ship signatures to detonate acoustic influence mines at safe distance from the sweeping platform.
ACP X32. Marine Pilotage and Pilot Operations: Autoridad del Canal de Panama, the Panama Canal Authority operating compulsory pilotage through the Canal.
ACP Pilot House Master X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Senior Panama Canal pilot grade qualified to handle the largest neopanamax vessels through the Agua Clara and Cocoli locks.
Acquisition (ARPA) X16. Nautical Science, Navigation and COLREGs: Process of selecting a radar target for automatic tracking.
Acquisition (satellite) X68. Maritime Satcom and Telecommunications: Initial process by which a stabilized maritime antenna locates and locks onto the assigned satellite after power-up or beam handover.
Acquisition Cost X4. Marine Insurance, P&I and Claims: brokerage and commission paid to place the risk.
Acquisition Finance X49. Ship Finance, Leasing and Maritime Capital Markets: Debt or equity raised specifically to fund the purchase of a vessel or fleet from a seller.
Acquittal C3. Logistics, freight forwarding and multimodal trade: Discharge of a transit document such as TIR carnet.
ACR X75. IMDG Code, Classes, Packing and Segregation: Authorized Container Repair under CSC Convention, prerequisite for any CTU offered for IMDG carriage.
ACR ARTEX ELT X95. GMDSS Equipment and Survival Craft Communications: Emergency Locator Transmitter line manufactured by ACR Electronics for aviation use, transmitting on 406 MHz to the Cospas-Sarsat system with 121.5 MHz homing signal.
ACR Electronics X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: US manufacturer of EPIRBs, PLBs and AIS-SARTs (e.g., GlobalFix V4/V5).
ACR GlobalFix Pro X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: 406 MHz Cospas-Sarsat EPIRB manufactured by ACR Electronics with integrated GPS for position transmission.
ACR GlobalFix V5 EPIRB X95. GMDSS Equipment and Survival Craft Communications: Category II 406 MHz Cospas-Sarsat EPIRB from ACR Electronics with internal 66-channel GPS receiver and 121.5 MHz homing transmitter.
ACR ResQLink View PLB X95. GMDSS Equipment and Survival Craft Communications: Personal Locator Beacon from ACR Electronics transmitting on 406 MHz Cospas-Sarsat with integrated GPS and digital display showing operating status and GPS fix confirmation.
Acrolein Inhibited X93. IBC Code and Chemical Tanker Operations: Aldehyde requiring inhibitor and Type 1 ship carriage owing to extreme toxicity, polymerization risk, and Category X classification under Annex II.
Acrylic Acid Inhibited X93. IBC Code and Chemical Tanker Operations: Reactive monomer CH2CHCOOH assigned UN 2218, polymerization-prone, requires Type 2 ship, Category Y, inhibited with MEHQ at vendor-specified concentration.
Acrylic copolymer SPC X165. Marine Coatings, Antifouling, and Hull Husbandry: Self-polishing copolymer using acrylate ester side chains that hydrolyze in seawater to release biocide at a controlled rate.
Acrylic Fibre Rope X9. Cargo Securing, Lashing and Stability Vocabulary: Synthetic lashing material; MSL = 0.30 x Breaking Load per CSS Annex 13.
Acrylic resin X45. Marine Paints, Coatings and Antifouling: Synthetic polymer used as binder in some topcoats and traffic-deck paints, offering good color and gloss retention.
Acrylonitrile X93. IBC Code and Chemical Tanker Operations: Nitrile CH2CHCN carried as a Type 2 ship cargo, Category Y under Annex II, inhibited monomer with strict inhalation toxicity controls under Chapter 15.
Acrylonitrile Barge X103. US Inland Waterway Towing and Barge: A specialized inland chemical tank barge handling acrylonitrile, requiring inhibitor monitoring and inerted ullage.
ACS (Asia-Pacific Computerized Information System) X146. Port State Control Regimes, MoUs, and Inspection Systems: The legacy information system formerly used by Tokyo MoU members, superseded by APCIS.
ACSC X107. Maritime Cybersecurity and OT Security: Australian Cyber Security Centre, the national authority for cyber security advice in Australia.
Act of God X53. Marine Insurance, P&I and Hull Clauses: A natural event of such an extraordinary character that human foresight could not have anticipated nor prevented its consequences, sometimes excluded from cover.
Act of Mannheim X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The 1868 revised treaty (building on the 1815 Vienna Congress) that codified freedom of navigation, equal treatment of flags, and toll-free passage on the Rhine, and which still governs the river…
Act of Navigation 1651 X39. Pre-1900 Maritime History: English statute under the Commonwealth restricting colonial trade to English ships, a principal cause of the First Anglo-Dutch War.
Act of Salvage X99. Marine Salvage Awards and SCOPIC: Any act or activity undertaken to assist a vessel or property in danger in navigable waters, as defined by Article 1(a) of the Salvage Convention 1989.
Acta Auriga X59. Offshore Wind O&M, CTVs and SOVs: Walk-to-work service operation vessel owned by Acta Marine, delivered in 2018 with an Ampelmann gangway and DP2 station keeping for North Sea wind farm support.
Acta Centaurus X59. Offshore Wind O&M, CTVs and SOVs: Acta Marine W2W SOV delivered in 2019, sister to Acta Auriga, deployed on Borssele and Hollandse Kust wind farm O&M campaigns.
Acta Marine X59. Offshore Wind O&M, CTVs and SOVs: Den Helder based Dutch shipowner operating a fleet of walk-to-work vessels, multicats, and CTVs serving North Sea offshore wind operations.
Acta Orion X123. Offshore Wind Installation Vessels and Operators: SOV delivered 2024 by Ulstein Verft, methanol dual-fuel ready, contracted to Equinor and Polenergia for Baltyk projects.
Acta Polaris X105. Offshore Wind Farm Installation and Vessels: Acta Marine service operation vessel deployed to North Sea wind farms providing walk-to-work crew transfer and accommodation.
Actio in Personam X51. Maritime Arbitration, Law and BIMCO Clauses: An admiralty action brought against a named defendant personally rather than against a vessel or other maritime property.
Actio in Rem X51. Maritime Arbitration, Law and BIMCO Clauses: An admiralty action brought directly against the ship, cargo, or freight as the defendant res, permitting arrest as security.
Action Code X66. Port State Control and Regional MOUs: Numerical code recorded by PSC officer indicating action taken on a deficiency, such as 10 for rectify deficiency before departure or 17 for detention.
Action Code 10 X66. Port State Control and Regional MOUs: Rectify deficiency before departure.
Action Code 15 X66. Port State Control and Regional MOUs: Rectify deficiency within 14 days.
Action Code 16 X66. Port State Control and Regional MOUs: Rectify deficiency at next port.
Action Code 17 X66. Port State Control and Regional MOUs: Detention of the ship.
Action Code 18 X66. Port State Control and Regional MOUs: Rectify deficiency within 3 months.
Action Code 19 X66. Port State Control and Regional MOUs: Suspend inspection.
Action Code 30 X66. Port State Control and Regional MOUs: Grounds for detention, deficiency to be rectified before departure.
Action Code 40 X66. Port State Control and Regional MOUs: Next port informed.
Action Code 46 X66. Port State Control and Regional MOUs: Rectify deficiency at agreed repair port.
Action Code 48 X66. Port State Control and Regional MOUs: As in the agreed flag State condition.
Action Code 49 X66. Port State Control and Regional MOUs: Ship is not allowed to sail.
Action Code 50 X66. Port State Control and Regional MOUs: Flag State or RO informed.
Action Code 55 X66. Port State Control and Regional MOUs: Classification society informed.
Action Code 70 X66. Port State Control and Regional MOUs: Recognized Organization to rectify.
Action Code 85 X66. Port State Control and Regional MOUs: Investigation of contravention of discharge provisions.
Action Code 99 X66. Port State Control and Regional MOUs: Other (specify in clear text).
Action in Personam X143. Landmark Maritime Law Cases and Doctrines: Common law admiralty proceeding against a named defendant, under UK Senior Courts Act 1981, section 21.
Action in Rem X143. Landmark Maritime Law Cases and Doctrines: Distinctive admiralty proceeding against the ship itself, allowing arrest as security.
Action Item (TMSA) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: A documented improvement task generated from a TMSA self-assessment gap, with target completion date and responsible party.
Action Maritime Foundation X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Welfare-adjacent charitable initiative supporting seafarers and their families in cases of distress at sea.
Action message X12. Maritime Casualties and Investigation: Output of a safety investigation directed at a specific party for corrective action.
Action taken code X7. Flag State, Port State Control and Detention Vocabulary: Numeric code recorded by PSC officer indicating the response required for each deficiency, ranging from 10 (no action) to 99.
Action to Avoid Collision X109. Maritime Autonomous Surface Ships and MASS Code: COLREGs Rule 8 requirement that any maneuver taken to avoid collision be positive, made in ample time, and readily apparent, a core constraint for autonomous decision logic.
Activated Alumina X1. Cargo Science, Commodities and Cargo Care: Bulk desiccant cargo, hygroscopic, IMSBC Group C when properly trimmed.
Activated Carbon Filter X63. Marine Auxiliary Machinery and Pumps: Polishing stage in fresh water generator and potable water systems for taste, odor, and chlorine removal.
Activated Carbon Polishing X69. EGCS Scrubbers, SCR and Marine Air Emissions: Optional post-treatment stage in closed-loop washwater plants for removing residual polycyclic aromatic hydrocarbons.
Activated charcoal X36. Shipboard Medical, Telemedicine and Seafarer Health: Oral adsorbent for ingested poisons; listed in IMGS Annex IV and MFAG decontamination guidance.
Activated Sludge Process X63. Marine Auxiliary Machinery and Pumps: Biological sewage treatment using aerated bacteria culture to oxidize organic matter in marine STPs.
Activation Energy X75. IMDG Code, Classes, Packing and Segregation: Threshold energy required to initiate decomposition of self reactive Class 4.1 or organic peroxide Class 5.2 substances.
Activator X45. Marine Paints, Coatings and Antifouling: Component B of a two-pack coating, typically an amine or polyamide for epoxies and an isocyanate for polyurethanes, that initiates cure when mixed with the base.
Active Agent X86. Port Agency, Husbandry and Disbursement: Appointed agent currently handling a specific port call as distinct from a network principal or correspondent.
Active Anode X100. Marine Cathodic Protection and Anodes: A sacrificial or impressed-current anode that is presently delivering protective current to the structure rather than sitting idle or disconnected.
Active AtoN X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Aid to navigation that emits light, sound or radio signals, requiring a power source.
Active bandhandling B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Material flow process in steel pre-processing line.
Active Beacon X80. Maritime Search and Rescue Coordination: A 406 MHz distress beacon that has been manually or automatically activated and is transmitting.
Active berth X15. Ports, Terminals and Stevedoring: berth currently occupied by a vessel under cargo operations.
Active berth length X175. Port Engineering, Dredging, Breakwaters, and Quays: Length of quay actually available for berthing operations after deducting structural and operational setbacks.
Active Captain X73. Marine Hydrography, Charting and ENC: A community crowd-sourced points-of-interest layer integrated by Garmin into recreational ENC displays.
Active Cargo X1. Cargo Science, Commodities and Cargo Care: Cargo that undergoes chemical or biological change in transit (self-heating coal, fermenting grain).
Active Cathodic Protection X113. Drydock and Ship Repair Yards: Impressed current corrosion control system inspected, recalibrated, and renewed during drydocking to maintain hull steel below corrosion potential.
Active Citadel X22. Piracy, Maritime Security and Armed Protection: Hardened internal compartment where crew retain control of propulsion, steering and communications during a piracy attack.
Active controlled atmosphere X70. Reefer Containers and Cold Chain Shipping: Reefer technology that injects nitrogen and modulates oxygen and carbon dioxide concentrations inside the container to slow produce respiration.
Active Corrosion X5. Marine Surveying and Inspection: Ongoing metal loss with visible scale, pitting, or wastage requiring action.
Active Directory X48. Maritime Cybersecurity: Microsoft directory service occasionally deployed on larger ships and at shore offices to centralize authentication, encryption keys, and group policy for crew workstations.
Active Directory (AD) X25. Maritime Cybersecurity, OT and IT: Microsoft directory service widely deployed in shipowner head offices and increasingly on vessel domain controllers.
Active Front End X67. Marine Electrical Systems and Shore Power: Regenerative converter topology used in marine variable-frequency drives to control harmonics and enable energy recovery.
Active Gear X87. Fishing Vessels and Fisheries Management: Fishing gear that is towed or otherwise moved through the water during capture, including trawls and seines.
Active Harmonic Filter X67. Marine Electrical Systems and Shore Power: Power electronic device that injects counter-phase currents to cancel harmonic distortion on a shipboard bus.
Active Heating, Survival Craft X52. Polar Code, Arctic and Antarctic Shipping: Requirement under Polar Code Chapter 8 for lifeboats and liferafts on Category A and B ships to maintain habitable interior temperatures in Polar Service Temperature conditions.
Active Heave Compensation X14. Offshore Oil and Gas Marine Operations: Crane/winch system that counters vessel heave in real time using hydraulics.
Active Heave Compensation (AHC) E4. Cruise, offshore energy and auxiliary/specialised fleets: Crane/winch system compensating vessel heave during subsea lifts.
Active IHM X50. Ship Recycling, Demolition and Hong Kong Convention: An Inventory of Hazardous Materials kept current with every refit, retrofit, and stores delivery throughout the operational life of the ship, per MEPC.269(68) Part II maintenance procedures.
Active Ingredient (Antifouling) D3. Marine environmental science, pollution and conservation: Biocide in antifouling paint such as copper or zinc pyrithione.
Active Lashing X9. Cargo Securing, Lashing and Stability Vocabulary: Lashing that is pre-tensioned and continuously resists cargo movement.
Active magnetic bearing B2. Marine Engineering: Bearing using controlled electromagnets, used in some turbomachinery.
Active Margin D2. Hydrography, tides, waves, bathymetry and marine geology: Continental margin coinciding with a plate boundary.
Active Material X75. IMDG Code, Classes, Packing and Segregation: Quantity of radionuclide in a Class 7 consignment expressed in becquerels for transport index calculation.
Active motion compensated gangway X59. Offshore Wind O&M, CTVs and SOVs: Telescoping bridge between an SOV and a turbine transition piece whose actuators continuously cancel vessel roll, pitch, and heave to maintain a stationary tip.
Active Notation X142. Classification Societies and Class Notations: A class notation currently in force on the certificate.
Active Passage Plan E1. Maritime security, geopolitics and risk: ECDIS route under execution, monitored for cross-track deviation and safety contour breaches.
Active Phased Array X68. Maritime Satcom and Telecommunications: Antenna in which each radiating element has its own transmit and receive amplifier, enabling rapid electronic beam steering without moving parts.
Active pilot X32. Marine Pilotage and Pilot Operations: Licensed pilot currently performing pilotage duties as opposed to a retired or supernumerary pilot.
Active redundancy X19. Engine Room Watchkeeping and UMS Operations: Configuration where two or more units share load so that failure of one does not interrupt service.
Active reefer X26. Reefer Containers and Cold Chain Logistics: Integral reefer container with onboard refrigeration unit drawing power from ship, terminal, or genset.
Active Reefer Container X136. Reefer Vessels and Cool Chain Operators: A container with an integral refrigeration unit drawing electric power from the vessel or terminal, distinct from porthole or insulated containers.
Active Salvage X13. Marine Salvage and Wreck Removal: Operation in progress with salvors physically engaged on the casualty, distinct from standby.
Active service X21. STCW Certificates, Crewing and Seafarer Welfare: Period during which a seafarer is engaged under a Seafarers Employment Agreement and entitled to wages.
Active Sonar D5. Coastal processes, sea-level, cryosphere and ocean observation science: Sonar emitting pulses and listening for echoes.
Active sonar minehunting X77. Naval Mine Warfare and Mine Countermeasures: The use of high-frequency transmitting sonar to detect, classify, and localize mine-like contacts on the seabed or in the water column.
Active Steering Compensation E3. Technology, digitalization and smart shipping: Autopilot feature for current/wind correction.
Active substance X18. Ballast Water, Biofouling and Antifouling: Biocide or chemical in an antifouling or ballast water treatment that exerts a biological effect on target organisms.
Active Underwriter X117. Marine Insurance Markets, Captives and Reinsurance: The individual at a Lloyd's syndicate with authority to bind risks, named in the syndicate's business plan filed with Lloyd's.
Active yaw (tidal turbine) X57. Ocean Energy Beyond Wind: Mechanism allowing a horizontal-axis tidal stream turbine to rotate its rotor into alignment with the flow direction on each tide.
Active-Passive Metal X100. Marine Cathodic Protection and Anodes: An alloy such as stainless steel or titanium that can exist in either a corroding active state or a film-protected passive state in seawater.
Active, HMC X130. National Coast Guards and Cutter Fleets: UK Border Force 42-meter customs cutter, sister to Searcher and Seeker, based at Portsmouth for English Channel patrols.
Activity Network X104. Project Cargo Forwarders and Heavy Transport: Sequenced schedule of every move, lift, and weld required to deliver a project cargo to its foundation.
Acts of Piracy Register X102. Seafarer Welfare and Maritime Charities: ICC International Maritime Bureau database of reported attacks and attempted attacks against merchant vessels worldwide.
Actual Cargo Quantity X5. Marine Surveying and Inspection: Quantity established by independent draft, ullage, or shore measurement at load or discharge.
Actual Total Loss (ATL) X4. Marine Insurance, P&I and Claims: total loss under section 57 of the Marine Insurance Act 1906 where the subject matter is destroyed, so damaged as to cease to be a thing of the kind insured, or irretrievably deprived from the…
Actuator X19. Engine Room Watchkeeping and UMS Operations: Pneumatic, hydraulic, or electric device that positions a valve or damper on command from the control system.
Actuator Health Monitoring X109. Maritime Autonomous Surface Ships and MASS Code: Continuous diagnostic surveillance of steering, propulsion, and thruster actuators that an autonomy system uses to detect degradation before loss of control.
Acuerdo de Vina del Mar X7. Flag State, Port State Control and Detention Vocabulary: Latin American Agreement on Port State Control of Vessels, signed 1992, covering 15 South and Central American maritime authorities.
Acuerdo Latino X66. Port State Control and Regional MOUs: Common short name in Spanish-speaking jurisdictions for the Acuerdo de Vina del Mar.
Acuerdo Latinoamericano (Vina del Mar Agreement) X146. Port State Control Regimes, MoUs, and Inspection Systems: The Latin American Agreement on Port State Control signed at Vina del Mar, Chile, on 5 November 1992, covering 15 South and Central American maritime authorities.
Acute Angle Pull X104. Project Cargo Forwarders and Heavy Transport: Sling configuration where the sling leg deviates sharply from vertical, sharply reducing working load limit.
Acute coronary syndrome (ACS) X36. Shipboard Medical, Telemedicine and Seafarer Health: Suspected myocardial infarction or unstable angina; shipboard protocol calls for aspirin 300 mg chewable, oxygen if SpO2 < 94%, GTN, and TMAS consult.
Acute Gastroenteritis (AGE) X41. Cruise Ship Public Health and VSP/USPH: Clinical syndrome of diarrhea or vomiting tracked aboard cruise vessels under the CDC Vessel Sanitation Program for outbreak surveillance.
Acute Marine Pollutant X1. Cargo Science, Commodities and Cargo Care: IMDG designation for goods harmful to the marine environment, marked with the "fish and tree" symbol.
Acute toxicity X18. Ballast Water, Biofouling and Antifouling: Short-term toxic effect of a discharge or biocide on test organisms, used in BWMS approval under MEPC.300(72).
Acute Toxicity Criteria X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: The LD50 oral, LD50 dermal, and LC50 inhalation thresholds in 2.6.2.2 used to assign Class 6.1 packing groups.
Acute Toxicity Threshold of NH3 X140. Ammonia as Marine Fuel and Hydrogen Shipping: IDLH value of 300 ppm set by NIOSH governs IGC Code emergency response planning.
ACV (Air Cushion Vehicle) X132. High-Speed Craft, Hydrofoils and Ferry Operators: Craft supported by a cushion of pressurised air contained by a flexible skirt, capable of operating over water, ice, marsh and beach. Regulated under the HSC Code when carrying passengers…
ACV (Amphibious Combat Vehicle) X106. Naval Surface Combatants: BAE Systems 8x8 wheeled amphibious vehicle replacing the AAV-7A1 in US Marine Corps service from 2020.
AD X6. Container, Intermodal and Trade Codes: Antidumping duty, additional US tariff offsetting unfair pricing.
Ad Hoc Arbitration X51. Maritime Arbitration, Law and BIMCO Clauses: A reference conducted outside any institutional rules, with procedure agreed by the parties or directed by the tribunal under the curial law.
AD Navigation ADX X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Portable Pilot Unit family from Norwegian manufacturer AD Navigation AS providing high-precision RTK GNSS positioning for pilots.
Ad Valorem Award X99. Marine Salvage Awards and SCOPIC: Salvage award expressed as a percentage of salved value, historically common before tariff-based SCOPIC compensation.
Ad valorem freight C1. Commercial shipping, chartering, economics and finance: Freight calculated as a percentage of cargo value rather than weight or measure.
Adak, USCGC (WPB-1333) X130. National Coast Guards and Cutter Fleets: Island-class patrol boat commissioned 1990, transferred to Bahrain in 2003 as part of PATFORSWA standup.
Adam LNG X134. LNG and LPG Carrier Operators and Containment Systems: FSRU of 170,000 m3 converted from steam carrier, operated by KARMOL joint venture of Karpowership and MOL.
Adamastos Shipping Co Ltd v Anglo-Saxon Petroleum Co Ltd [1959] AC 133 X143. Landmark Maritime Law Cases and Doctrines: House of Lords held that a US Carriage of Goods by Sea Act paramount clause incorporated into a charterparty applied.
Adamite roll B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Roll material used in plate mill, relevant to material supply.
Adams and Adams X114. Maritime Arbitration and Shipping Law Firms: South African law firm with a maritime practice handling admiralty arrests, cargo claims, and marine insurance disputes in Durban and Cape Town.
Adani Ports and SEZ X118. Ship Recycling Yards, Beaches and Regulation: Indian port operator that, while not a recycler, handles last-voyage anchorage and bunkering for several vessels delivered to Alang via Pipavav and Mundra.
Adani Ports Tugs X137. Harbour Tugs, Towage Operators and Tug Builders: Captive harbour tug fleet operated by Adani Ports and SEZ Ltd across Mundra, Hazira, Dhamra, Krishnapatnam and other Indian terminals.
Adaptive Harvest Strategy D4. Fisheries, aquaculture, blue economy and marine resources: Management approach adjusting catch by stock status.
Adaptive Management D3. Marine environmental science, pollution and conservation: Iterative resource management approach incorporating monitoring and learning.
AdBlue X69. EGCS Scrubbers, SCR and Marine Air Emissions: Trademarked 32.5% urea solution functionally equivalent to AUS32, occasionally referenced for high-speed marine SCR applications.
ADC X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Arabian Drilling Company, a Saudi jackup drilling contractor partly owned by TAQA and Industrialization & Energy Services.
ADCA Sun X93. IBC Code and Chemical Tanker Operations: Tradename associated with the Marineline 784 advanced polymer coating system marketed by Advanced Polymer Coatings for chemical cargo tanks.
ADCAP (Advanced Capability) X91. Submarines and Submarine Cable Systems: Designation for the upgraded Mk 48 Mod 6 and Mod 7 heavyweight torpedo variants used by the US Navy.
ADCI X82. Saturation Diving and Offshore Diving Operations: Association of Diving Contractors International, the US commercial diving trade body.
ADCI Consensus Standards X82. Saturation Diving and Offshore Diving Operations: Reference document defining minimum US commercial diving practice.
ADCIRC X175. Port Engineering, Dredging, Breakwaters, and Quays: Two- and three-dimensional finite element hydrodynamic circulation model widely used in the United States for storm surge, tide, and coastal modeling.
Adcock antenna (radio DF) B3. Nautical Science: Direction-finding antenna used in marine RDF.
ADCP X15. Ports, Terminals and Stevedoring: Acoustic Doppler Current Profiler used in port channels to monitor currents.
ADCP (Acoustic Doppler Current Profiler) X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Sonar instrument that measures water current velocity across a depth profile using the Doppler shift of acoustic returns from suspended particles. Teledyne RDI Workhorse and Ocean Surveyor models…
ADCP Bottom Track X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Mode in which an ADCP measures vessel speed over ground by pinging the seabed, supporting precise survey navigation and current vector resolution.
Added mass B1. Naval Architecture: Apparent increase in vessel mass due to fluid acceleration around the hull during motion.
Added resistance in waves B1. Naval Architecture: Mean increase in calm-water resistance caused by wave-induced motions and reflections.
Addendum X51. Maritime Arbitration, Law and BIMCO Clauses: A formal written amendment to a fixture recap or charterparty, signed by both principals or brokers acting under authority.
Additional Class Notation X8. IACS, Class Rules and Class Notations: a notation appended to the main class symbol denoting optional or service-specific compliance.
Additional Comments X40. Tanker Vetting, SIRE and VIQ: Free-text inspector observations entered in the SIRE report alongside structured responses to provide context that the question itself does not capture.
Additional Inspection X66. Port State Control and Regional MOUs: Inspection triggered by overriding or unexpected factor, regardless of inspection interval.
Additional Lashing X9. Cargo Securing, Lashing and Stability Vocabulary: Extra lashing applied beyond minimum CSM requirements when sea conditions warrant.
Additional Premium (AP) X4. Marine Insurance, P&I and Claims: extra premium charged for held-covered situations, breach of warranty, deviation, or change of voyage.
Additional survey X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: A SOLAS I/7, I/8, I/9, or I/10 survey required after repairs, defects, or damage that affects safety.
Additional training X21. STCW Certificates, Crewing and Seafarer Welfare: Specialized STCW Chapter V training beyond core CoC requirements, such as tanker, polar, or passenger ship endorsements.
Additionality D6. Decarbonization, emissions and alternative fuels: Requirement that a project would not have occurred without the carbon scheme.
Additive package X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Engineered chemical blend (detergents, dispersants, anti-wear, anti-foam) added to base oil to produce a finished lubricant.
Additive treatment X47. Marine Fuel Quality and ISO 8217: Dosing of cold flow improvers, stability dispersants, or combustion catalysts into bunker fuel to modify handling or burning characteristics.
Additive Treatment Report X115. Marine Bunker and Cargo Surveying: Surveyor record describing any combustion improver, biocide, or pour-point depressant injected into a bunker stem before, during, or after delivery.
Additives X75. IMDG Code, Classes, Packing and Segregation: Substances added to desensitize self reactive Class 4.1 or organic peroxide Class 5.2 entries to reach SADT thresholds.
Additives (fuel) X149. Marine Fuels, Bunkering, and Alternative Fuels: Chemical packages (combustion improvers, ash modifiers, asphaltene dispersants, biocides) blended into marine fuels to address stability, ignition, or microbial issues.
Additives Inventory X50. Ship Recycling, Demolition and Hong Kong Convention: The list of lubricating oil, fuel, and hydraulic system additives carried aboard, declared under Part III stores section of the IHM.
Additives, Cargo X1. Cargo Science, Commodities and Cargo Care: Inhibitors or stabilizers (e.g., TBC in styrene) added before loading to prevent reaction.
Address commission C1. Commercial shipping, chartering, economics and finance: Commission deducted from gross freight or hire payable to the charterer.
Address Commission (ADCOM) X17. Chartering, Shipbroking and Freight Trading: Commission deducted from freight or hire and returned to the charterer, typically 1.25 to 3.75 percent.
Address Resolution Protocol Spoofing X48. Maritime Cybersecurity: Layer 2 attack in which a malicious device on the shipboard LAN poisons ARP caches to intercept bridge or engine control traffic.
ADE (Above Decks Equipment) X68. Maritime Satcom and Telecommunications: Outdoor portion of a satellite terminal comprising the radome, antenna pedestal, and outdoor electronics.
Adelaide Island X133. Polar Research Vessels and Polar Code Regimes: Antarctic Peninsula island hosting BAS Rothera Research Station, served by RRS Sir David Attenborough.
Adelaide Pilots X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Flinders Ports pilotage service handling vessels entering Port Adelaide, Outer Harbor, and the Port River channels in South Australia.
Aden, Gulf of X127. Maritime Security, Anti-Piracy and PMSCs: Body of water between Yemen and Somalia, principal Somali piracy theater 2008 to 2012 with over 230 attacks in 2011 alone.
Adequacy of Procedures X40. Tanker Vetting, SIRE and VIQ: An assessment dimension under TMSA that judges whether documented procedures are sufficient in content and detail for the operator's trade pattern.
Adequate manning C2. Ship operations, crewing and technical management: Compliance with the flag state's minimum safe manning document.
Aderyn Mor X57. Ocean Energy Beyond Wind: Demonstration tidal stream project planned off Anglesey, Wales by Minesto using its Dragon kite technology.
ADES X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Saudi Arabia-based ADES Holding, a major jackup and onshore drilling contractor with regional Middle East focus.
ADGM Arbitration Centre X114. Maritime Arbitration and Shipping Law Firms: Abu Dhabi Global Market Arbitration Centre, an English common law forum hosting maritime arbitrations under its 2024 Procedural Rules.
Adhesion X45. Marine Paints, Coatings and Antifouling: Bond strength between a coating film and its substrate or between successive coating layers, measured by pull-off or cross-cut tests.
Adhesion promoter X45. Marine Paints, Coatings and Antifouling: Specialty primer or tie coat applied to improve intercoat bonding, particularly between dissimilar generic types.
Adhesive Cure X96. Hull Integrity Monitoring and Strain Gauges: Controlled time and temperature step in strain gauge installation during which the bonding adhesive develops full mechanical strength.
Adhesive M-Bond AE-10 X96. Hull Integrity Monitoring and Strain Gauges: Two-part epoxy adhesive from Vishay Micro-Measurements used for long-term bonding of foil strain gauges to steel.