Glossary

Maritime glossary, terms beginning with A (page 5)

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

Showing 250 of 3739 terms (page 5 of 15).

Affreightment, contract of X71. Shipbrokers and Brokerage Firms: Multi-shipment freight contract often arranged through dry or tanker chartering brokers.
Affreightment, Contract of (COA) X161. Shipbroking, Freight Derivatives, and Baltic Indices: Multi-voyage contract under which an owner commits to lift a defined cargo tonnage over a period at agreed rates.
AFL-CIO Maritime Trades Department X102. Seafarer Welfare and Maritime Charities: Federation of US transport unions that coordinates maritime affiliate policy under the American Federation of Labor and Congress of Industrial Organizations.
Aflatoxin X1. Cargo Science, Commodities and Cargo Care: Mold-produced toxin in peanuts, corn, and oilseeds; cause for cargo rejection at discharge.
Afloat X3. Ship Handling, Seamanship and Deck Vocabulary: Buoyed by water; not aground.
AFM X80. Maritime Search and Rescue Coordination: Armed Forces of Malta, the national SAR authority operating MRCC Malta in Valletta.
AFP (Alternative Fire Protection) X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Equivalent arrangements under SOLAS II-2/17 permitting novel fire-safety designs subject to MSC approval per MSC/Circ.1002.
AFRA C1. Commercial shipping, chartering, economics and finance: Average Freight Rate Assessment, scale published by the London Tanker Brokers' Panel.
AFRA (Average Freight Rate Assessment) X17. Chartering, Shipbroking and Freight Trading: Monthly tanker freight benchmark published by the London Tanker Brokers' Panel since 1954.
AFRA scale C3. Logistics, freight forwarding and multimodal trade: Reference scale for tanker freight averages.
Aframax C1. Commercial shipping, chartering, economics and finance: Tanker segment of roughly 80,000 to 120,000 dwt named after the AFRA scale.
Aframax (engine duty) B2. Marine Engineering: Typical engine power class for Aframax tankers.
Aframax berth X15. Ports, Terminals and Stevedoring: tanker berth designed for crude carriers of roughly 80,000 to 120,000 dwt.
Aframax Bunker Stem X72. Bunkering Hubs and Bunker Suppliers: Industry shorthand for stem sizes in the 1,500 to 4,000 metric ton band typically lifted by Aframax tankers.
Aframax bunker tanker X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Larger end of the bunker delivery fleet, sometimes used as a floating storage and offtake unit in Fujairah and the ARA region for VLSFO blending.
Aframax Casualty X60. Marine Salvage and Wreck Removal: Salvage incident involving an Aframax class tanker, typically 80,000 to 120,000 dwt.
Aframax Coated Parcel Carrier X135. Chemical Tanker Operators and IBC Code Cargoes: 80,000 to 120,000 dwt epoxy-coated tanker used by Stolt-Nielsen and Odfjell for clean petroleum products and easy chemicals when stainless capacity is short.
Aframax efficiency baseline X34. Decarbonization, Alternative Fuels and Carbon Pricing: EEDI reference line value applied to Aframax crude tankers under MARPOL Annex VI Chapter 4.
Aframax Escort X79. Tugs and Towage Industry: Escort towage assignment for an Aframax tanker requiring tugs of sufficient bollard pull and indirect steering force.
Aframax LPG X56. LNG/LPG Carriers and IGC Code: Informal label occasionally applied to mid-size LPG carriers near 60,000 cubic meters, although the LPG fleet uses VLGC, MGC, and Handygas as the standard size classes.
AFRAMAX Provisioning X120. Marine Catering, Provisions and Ship Chandlers: Mid-size tanker provisioning runs typically scoped for 25 to 28 crew over 30 days, common at Rotterdam and Singapore.
Aframax tanker B5. Ship Types and Individual Vessels: Crude tanker of 80,000-120,000 DWT.
Aframe (model basin) B1. Naval Architecture: Carriage gantry supporting dynamometers above the towing tank.
AFRCC X80. Maritime Search and Rescue Coordination: Air Force Rescue Coordination Center at Tyndall AFB, the US inland SAR coordinator.
Africa Express Line X136. Reefer Vessels and Cool Chain Operators: Reefer service jointly operated by Compagnie Fruitiere and partners moving West African bananas and pineapples to European markets, principally Marseille and Portsmouth.
Africa-1 X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Submarine cable system planned to link East and North Africa with Europe and the Middle East along the African coast.
Africa-2 (2Africa) X91. Submarines and Submarine Cable Systems: Submarine cable system encircling the African continent, sponsored by Meta with partners including China Mobile International, MTN, Orange, Saudi Telecom, Telecom Egypt, Vodafone, and WIOCC, with…
AFS amendment 2021 X165. Marine Coatings, Antifouling, and Hull Husbandry: MEPC.334(76) amendment adding cybutryne (Irgarol 1051) to Annex 1 of the AFS Convention, with a ban effective 1 January 2023.
AFS Certificate X18. Ballast Water, Biofouling and Antifouling: International Anti-fouling System Certificate issued under the AFS Convention for ships of 400 GT and above engaged on international voyages.
AFS Convention A4. Other IMO and ILO conventions and codes: International Convention on the Control of Harmful Anti-fouling Systems on Ships, 2001.
AFS Convention 2001 X50. Ship Recycling, Demolition and Hong Kong Convention: The IMO International Convention on the Control of Harmful Anti-fouling Systems on Ships, which prohibited tributyltin antifouling paints worldwide from 17 September 2008.
AFS Convention 2023 amendment X45. Marine Paints, Coatings and Antifouling: Adoption by MEPC adding cybutryne (Irgarol 1051) to Annex I, prohibiting its application to ships from 1 January 2023.
AFS Convention 2023 Amendments X158. IMO Conventions, Protocols, Codes, and Resolutions: Amendments controlling cybutryne in anti-fouling systems, adopted by MEPC.334(76) and entering into force 1 January 2023.
AFS Declaration X18. Ballast Water, Biofouling and Antifouling: Declaration on Anti-fouling System required for ships of 24 m or more in length but less than 400 GT engaged on international voyages.
AFS Linkage A2. Maritime safety legislation: SOLAS and its codes: Cross-reference in SOLAS Chapter II-1 to anti-fouling provisions.
AFS Statement X50. Ship Recycling, Demolition and Hong Kong Convention: The statement of compliance with the AFS Convention 2001, referenced when assessing residual tributyltin coatings during pre-recycling surveys.
AFS survey X45. Marine Paints, Coatings and Antifouling: Inspection performed to verify that a ship's anti-fouling system complies with the AFS Convention.
Aft F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Toward the stern.
Aft AIS Antenna Position (D) X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Distance from the AIS GNSS antenna reference to the stern, used with A, B, C to define vessel dimensions.
Aft block X58. Shipbuilding Yards and Construction: Stern hull section containing the engine room, stern tube, and steering gear, typically erected late in dock assembly.
Aft block (Block construction) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Stern blocks erected on building dock.
Aft Cabin X39. Pre-1900 Maritime History: The stern compartment in a sailing ship typically reserved for the captain or senior officers.
Aft Cabin Iconography F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Recurring motif in Dutch Golden Age marine painting.
Aft Cut X28. Ship Recycling and End-of-Life: Sequenced removal of stern block including rudder, propeller, and steering gear during dismantling.
Aft deck X35. Yacht and Superyacht Industry: Open deck at the stern of a yacht used for al fresco dining and tender boarding.
Aft Draft X5. Marine Surveying and Inspection: Reading taken at the aft draft marks on both sides.
Aft Draft Mark X155. Marine Surveying Practice and Cargo Inspection: The painted or welded draft scale at the stern used in draft surveys, normally read at the rudder post or as close to the aft perpendicular as practical.
Aft End Wall X83. ISO Container Manufacturing and Leasing: Rear corrugated steel wall opposite the door end of a dry freight container.
Aft Escape Trunk X91. Submarines and Submarine Cable Systems: Pressure-rated chamber providing crew escape access from the aft compartment of a submarine.
Aft Funnel Installation X69. EGCS Scrubbers, SCR and Marine Air Emissions: Retrofit scrubber arrangement placed in the existing uptake casing aft of the engine room.
Aft Gantry (Stern Trawler) X87. Fishing Vessels and Fisheries Management: Lifting structure over the stern ramp used to handle the cod end and trawl doors.
Aft garage X35. Yacht and Superyacht Industry: Stern compartment with hydraulic door housing tenders and toys.
Aft lashing bridge X76. Stevedoring, Lashing and Cargo Securing: Transverse structural gantry abaft a container bay providing elevated lashing points for high tiers.
Aft Lead X79. Tugs and Towage Industry: Towing arrangement where the working line leads from the tug's stern winch to the assisted vessel.
Aft Moonpool X82. Saturation Diving and Offshore Diving Operations: Vessel opening near the stern through which the diving bell is launched.
Aft Mooring Station X40. Tanker Vetting, SIRE and VIQ: A discrete inspection area at the stern where the inspector reviews winches, brakes, ropes, tails, and fairleads against MEG4 and the relevant VIQ chapter.
Aft peak block X58. Shipbuilding Yards and Construction: Sternmost structural block enclosing the aft peak tank above the rudder horn area.
Aft peak bulkhead X38. Propellers, Stern Gear and Shaft Lines: Watertight boundary forward of the stern tube compartment, supporting the inboard end of the stern-tube assembly.
Aft peak bunker tank X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Stern-located ballast or fuel tank used in some vessels for trim and fuel storage.
Aft peak tank B2. Marine Engineering: Aftermost ballast tank around the sterntube.
Aft Peak Tank Cleaning X50. Ship Recycling, Demolition and Hong Kong Convention: The freshwater and chemical cleaning of the aft peak ballast space before hot work commences at the recycling yard.
Aft Peak Tank Inspection X113. Drydock and Ship Repair Yards: Drydock survey of the aftermost compartment for coating breakdown, structural deformation, and watertight integrity above and below the propeller shaft.
Aft Peak Tank Strain X96. Hull Integrity Monitoring and Strain Gauges: Localized strain measurement around the aft peak structure used to monitor stern slamming and propeller-induced vibration loads.
Aft Perpendicular X54. Naval Architecture Software and IACS Rules: Reference station at the after side of the rudder post or rudder stock centerline used in naval architecture drawings.
Aft Perpendicular (AP) X5. Marine Surveying and Inspection: Reference point at the after side of the rudder post; basis for draft and trim calculations.
Aft seal (stern tube) X38. Propellers, Stern Gear and Shaft Lines: Sealing assembly at the propeller end of the stern tube preventing oil egress and seawater ingress.
Aft Section X75. IMDG Code, Classes, Packing and Segregation: Stern stowage area of a container vessel often selected for Class 1 or temperature sensitive Class 5.2 cargo by ship plan.
Aft Spring X30. Tug Operations and Harbour Towage: Mooring line leading aft from a forward part of the vessel to restrict forward movement.
Aft stern tube bearing X38. Propellers, Stern Gear and Shaft Lines: Long, propeller-side bearing that carries the bulk of the static and dynamic propeller weight reaction.
Aft Tow X103. US Inland Waterway Towing and Barge: The trailing portion of a multi-string barge tow as measured from the pushboat's face wires forward.
Aft Trawl Gantry X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: Steel A-frame or H-frame structure at the stern of a trawler used to suspend the trawl doors and net during shooting and hauling.
Aft Trawl Winch X87. Fishing Vessels and Fisheries Management: Drum winch located on the stern shelter deck of a modern trawler for warp recovery.
After cooler X19. Engine Room Watchkeeping and UMS Operations: Air cooler downstream of turbocharger compressor, lowering scavenge air temperature before the receiver.
After Delivery Survey X115. Marine Bunker and Cargo Surveying: Bunker survey leg conducted upon completion of fuel transfer to confirm closing soundings, temperatures, and densities for the receiving vessel.
Afterbody B1. Naval Architecture: Portion of the hull aft of midships, governing wake and propeller inflow.
Aftercooler X88. Marine Surface Preparation and Coatings Application: Heat exchanger installed downstream of a compressor to lower compressed air temperature and condense moisture before it enters blast or breathing air circuits.
Afterdeck X3. Ship Handling, Seamanship and Deck Vocabulary: The portion of the weather deck abaft amidships.
Ag/AgCl Reference Electrode X100. Marine Cathodic Protection and Anodes: A silver/silver-chloride electrode in seawater that serves as the standard reference for marine cathodic protection potential measurements.
AGA Report No. 5 X20. LNG Operations and Custody Transfer: Fuel Gas Energy Metering procedures used in conjunction with GC analysis for energy determination.
AGA-8 X20. LNG Operations and Custody Transfer: American Gas Association Report No. 8 detailed characterization equation of state for natural gas density and compressibility, referenced for custody transfer calculation.
AGE Case Definition X41. Cruise Ship Public Health and VSP/USPH: VSP criterion requiring three or more episodes of loose stools in 24 hours, or vomiting plus one additional symptom, for reportable counting.
Age Factor X66. Port State Control and Regional MOUs: Component of Ship Risk Profile; ships over 12 years receive higher weighting.
AGE Log X41. Cruise Ship Public Health and VSP/USPH: Bound or electronic register maintained by the ship medical department recording every gastrointestinal case among passengers and crew.
Age of Discovery F1. Maritime History: European maritime expansion roughly 1418 to 1620, opening sea routes to Africa, Asia, and the Americas.
Age of Exploration F1. Maritime History: Synonym for the Age of Discovery, emphasizing voyages of Portuguese, Spanish, Dutch, English, and French navigators.
Age of Sail F1. Maritime History: Period roughly 1571 to 1862 when sailing warships and merchantmen dominated global trade and naval warfare.
Age of tide X16. Nautical Science, Navigation and COLREGs: Time lag between syzygy and the following spring tide.
Age Restriction X40. Tanker Vetting, SIRE and VIQ: A charterer screening rule, common among oil majors, that caps the maximum hull age of a tanker accepted for nomination, often set at 15, 20, or 25 years by trade.
AGE Surveillance Report X41. Cruise Ship Public Health and VSP/USPH: Standardized tally of cumulative gastrointestinal cases transmitted to the CDC Maritime Unit during each voyage to a US port.
Aged sediment X47. Marine Fuel Quality and ISO 8217: Sediment that develops in a fuel sample after thermal or chemical aging, distinguishing unstable fuels from those merely carrying existing solids.
Aged Ship Programme X142. Classification Societies and Class Notations: Enhanced inspection regime triggered when a tanker or bulk carrier exceeds 10 or 15 years.
Agency X21. STCW Certificates, Crewing and Seafarer Welfare: Recruitment and placement service that hires seafarers on behalf of shipowners under MLC Regulation 1.4.
Agency Agreement X4. Marine Insurance, P&I and Claims: contract between an insurer and an agent setting underwriting authority limits.
Agency Appointment X86. Port Agency, Husbandry and Disbursement: Written instruction nominating an agent for a specific vessel call or contract period.
Agency Clause X51. Maritime Arbitration, Law and BIMCO Clauses: A charterparty term identifying the party with authority to appoint port agents and allocating the cost of agency services.
Agency commission X71. Shipbrokers and Brokerage Firms: Fee paid to a port agent, distinct from brokerage but sometimes coordinated through the same broker.
Agency Disbursement Account (DA) X120. Marine Catering, Provisions and Ship Chandlers: Itemized husbandry invoice from the port agent covering cash to master, stores delivery, and launch services.
Agency fee X6. Container, Intermodal and Trade Codes: Charge by a carrier or NVOCC for documentation and local representation.
Agency Fees, Demolition X50. Ship Recycling, Demolition and Hong Kong Convention: Commission paid to a brokerage acting between owner and cash buyer, typically expressed in US dollars per light displacement ton.
Agency Funds X86. Port Agency, Husbandry and Disbursement: Money held by the agent on the principal's behalf to settle port expenses.
Agency Husbandry Allowance X86. Port Agency, Husbandry and Disbursement: Separate fee covering crew, supply, and personal services beyond standard port call work.
Agency Instruction X86. Port Agency, Husbandry and Disbursement: Written directive from principal to agent specifying services to be performed.
Agency Nomination X86. Port Agency, Husbandry and Disbursement: Naming of the agent in the charter party or by post-fixture notice.
Agency Notification X75. IMDG Code, Classes, Packing and Segregation: Pre arrival notification to port state of dangerous goods quantities and classes under SOLAS VII regulation 6.
Agency Override X86. Port Agency, Husbandry and Disbursement: Additional commission paid to a network or hub agency on top of the local agency fee.
Agency Tariff X86. Port Agency, Husbandry and Disbursement: Published schedule of agency fees, often issued by national associations or individual firms.
Agent X125. Superyacht Industry, Builders and Brokers: A locally appointed firm that handles port clearance, provisioning, and berth booking for visiting yachts.
Agent (Ship's) A5. Maritime Law, private and commercial: Shore representative authorized to act for the owner or charterer in port.
Agent of Necessity X86. Port Agency, Husbandry and Disbursement: Agent appointed under emergency conditions without express authorization, binding the principal under doctrine of necessity.
Agents Authorized to Sign DG Declaration X75. IMDG Code, Classes, Packing and Segregation: Shipper or duly authorized representative who signs the Multimodal Dangerous Goods Form under IMDG 5.4.1.6.
Ageotec Pollux X65. ROVs, AUVs, USVs and Marine Robotics: Italian observation-class ROV from Ageotec used for inspection in inland and inshore waters.
Aggregate Deck Load X9. Cargo Securing, Lashing and Stability Vocabulary: Total cargo mass on weather deck, limited by deck strength and stability criteria.
Aggregate dredging X124. Dredging Industry and Reclamation Contractors: Marine sand and gravel extraction for construction use, regulated in the UK by the Crown Estate and Marine Management Organisation.
Aggregate Excess of Loss X117. Marine Insurance Markets, Captives and Reinsurance: A reinsurance form that attaches once a cedent's annual ultimate net loss exceeds a stated aggregate.
Aggregate Limit X4. Marine Insurance, P&I and Claims: maximum payable in respect of all claims in the policy period.
Aggregate, Mineral X1. Cargo Science, Commodities and Cargo Care: Crushed stone, sand, and gravel carried as Group C bulk under IMSBC.
Aggregates Barge X103. US Inland Waterway Towing and Barge: A deck or open hopper barge carrying sand, gravel or crushed stone on inland waters.
Aggregating Device D4. Fisheries, aquaculture, blue economy and marine resources: Object such as a FAD attracting fish for capture.
Aggregation Clause X53. Marine Insurance, P&I and Hull Clauses: A provision defining the basis on which separate losses are treated as one event for the purpose of deductibles, limits, and reinsurance recoveries.
Aggregator Indices X44. Shipping Indices, FFAs and Freight Markets: Composite freight indices that blend several route assessments into a single benchmark number for trading and reporting purposes.
AGI X11. Naval Vessels, Warship Systems and Naval Architecture: Auxiliary, General, Intelligence collection ship.
AgilePlans X68. Maritime Satcom and Telecommunications: KVH subscription program bundling VSAT hardware, airtime, installation, and crew content for a single monthly fee.
Agitation dredging X124. Dredging Industry and Reclamation Contractors: Method that resuspends sediment for transport by ambient currents rather than mechanical lift, common in maintenance work.
AGM X11. Naval Vessels, Warship Systems and Naval Architecture: Auxiliary, General, Missile range instrumentation ship.
AGM-158C LRASM X106. Naval Surface Combatants: Long Range Anti-Ship Missile derived from the JASSM-ER, deployed on US Navy surface ships and aircraft.
AGMS X109. Maritime Autonomous Surface Ships and MASS Code: Avikus Group Marine Services, the marine services arm associated with Hyundai Heavy Industries subsidiary Avikus.
Agonic line X16. Nautical Science, Navigation and COLREGs: Line on the Earth's surface along which magnetic variation is zero.
AGOR X11. Naval Vessels, Warship Systems and Naval Architecture: Auxiliary, General, Oceanographic Research vessel.
Agreed bundle X152. Maritime Arbitration and Dispute Resolution: Single paginated set of documents agreed by the parties for use at a maritime arbitration hearing, typically prepared per LMAA Checklist guidance.
Agreed Salvage Award X99. Marine Salvage Awards and SCOPIC: Negotiated settlement of a salvage claim agreed between salvors and property interests in lieu of arbitration.
Agreed Value X4. Marine Insurance, P&I and Claims: the value stated in the policy under section 27 of the Marine Insurance Act 1906, conclusive between assured and underwriter in the absence of fraud.
Agreement on Port State Measures (PSMA) X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: FAO treaty adopted in 2009 and entered into force in 2016, requiring foreign-flagged fishing vessels to seek authorization before entering port to prevent landing of IUU catch.
Agribulk X1. Cargo Science, Commodities and Cargo Care: Trade term for agricultural dry bulk (grains, oilseeds, meals, sugar).
Aground F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Resting on the bottom.
AGS X11. Naval Vessels, Warship Systems and Naval Architecture: Auxiliary, General, Surveying ship.
AGS (Advanced Gun System) X106. Naval Surface Combatants: 155 mm naval gun fitted to Zumwalt-class destroyers, whose Long Range Land Attack Projectile program was canceled in 2016.
Agulhas Current D1. Physical and chemical oceanography and marine meteorology: Strong western boundary current of the southwest Indian Ocean off the east coast of Africa.
Agulhas Retroflection X10. Marine Biology, Fisheries and Oceanography: Region where the Agulhas Current turns back on itself south of Africa, shedding rings into the Atlantic.
Agusta-Bell AB-412 X130. National Coast Guards and Cutter Fleets: Twin-engine helicopter used by Italian Guardia Costiera Reparto Volo for SAR from Sarzana-Luni and Catania.
AgustaWestland AW139 X80. Maritime Search and Rescue Coordination: Twin-engine medium SAR helicopter operated by multiple coast guards including the Italian Guardia Costiera.
AgustaWestland AW189 X80. Maritime Search and Rescue Coordination: Civil derivative of the AW149 used by Bristow for UK SAR contracts.
AgustaWestland EH101 X31. Helicopter Operations on Ships: Three-engine medium-heavy helicopter, military variant Merlin, civil variant AW101 used in SAR.
AGV X15. Ports, Terminals and Stevedoring: Automated Guided Vehicle, driverless container transporter on the apron, used at Rotterdam ECT, APM Maasvlakte II, and Long Beach LBCT.
AGV (Automated Guided Vehicle) X46. Container Terminal Operations: An unmanned horizontal transport vehicle that moves containers between the quay and the stacking yard along predefined paths guided by transponders, magnets, or GNSS.
AGV battery swap X15. Ports, Terminals and Stevedoring: automated exchange of depleted batteries on electric AGV fleets.
AGV Battery Swap Station X46. Container Terminal Operations: A fixed yard facility where depleted lithium-ion battery packs on electric AGVs are exchanged for charged packs in a few minutes to maintain continuous duty cycles.
AGV Charging Lane X46. Container Terminal Operations: A dedicated parking aisle equipped with conductive or inductive chargers where battery AGVs replenish energy between transport assignments.
AGV Claim Area X46. Container Terminal Operations: A reserved spatial buffer around an AGV maintained by the fleet management system to prevent collisions during simultaneous path traversal.
AGV Pool X46. Container Terminal Operations: The fleet of AGVs assigned to a single quay crane or block, sized to maintain the target moves-per-hour without queueing at the apron.
AGW (All Going Well) X17. Chartering, Shipbroking and Freight Trading: Qualifier on a fixture indication meaning subject to everything proceeding without disruption.
AH32 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS higher strength hull steel grade with minimum yield 315 MPa, suffix A indicates impact tested at 0 degrees Celsius.
AH36 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS higher strength hull steel grade with minimum yield 355 MPa, the dominant grade in modern merchant hulls.
AH36 steel B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Higher-tensile shipbuilding steel with min yield 355 MPa.
AH40 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS higher strength hull steel grade with minimum yield 390 MPa used in VLCC and Capesize structures.
AH47 X92. Marine Steel Suppliers and Shipbuilding Plate: IACS ultra high strength hull steel grade with minimum yield 460 MPa, A suffix indicates impact at 0 degrees Celsius.
AHC X65. ROVs, AUVs, USVs and Marine Robotics: See Active heave compensation.
Ahead X3. Ship Handling, Seamanship and Deck Vocabulary: In the direction of the bow; engine order for forward propulsion.
Ahead Bell X103. US Inland Waterway Towing and Barge: A wheelhouse order to apply forward propulsion, often communicated by Kahlenberg or electronic engine order on inland towboats.
Ahmed Mujtaba Industries X118. Ship Recycling Yards, Beaches and Regulation: Plot operator at Gadani Ship Breaking Yard, Pakistan, recorded by Pakistan Ship Breakers Association membership lists.
Ahnighito Meteorite F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Carried south by Robert Peary's vessel, exhibited in New York.
AHO X73. Marine Hydrography, Charting and ENC: Australian Hydrographic Office, headquartered in Wollongong, New South Wales, and producer of Australian official charts.
AHO Wollongong X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Headquarters of the Australian Hydrographic Office at HMAS Albatross airfield site, Wollongong, New South Wales, which became the official charting authority for Australia.
AHRI 1110 X26. Reefer Containers and Cold Chain Logistics: Air-Conditioning, Heating, and Refrigeration Institute standard for performance rating of marine refrigerated container refrigeration units.
AHT X13. Marine Salvage and Wreck Removal: Anchor Handling Tug, deploys ground tackle and beach gear for refloating operations.
AHT (Anchor Handling Tug) B5. Ship Types and Individual Vessels: Tug specialized for anchor handling.
AHTS X13. Marine Salvage and Wreck Removal: Anchor Handling Tug Supply, multipurpose vessel for salvage tow, anchor work, and supply.
AHTS (Anchor Handling Tug Supply) B5. Ship Types and Individual Vessels: Offshore tug for rig anchor handling and supply.
AHTS Dual-Role Tug X137. Harbour Tugs, Towage Operators and Tug Builders: Anchor Handling Tug Supply vessel configured to perform both offshore anchor work and harbour assist, common in West African and Caspian ports.
Ahts vs dredger X124. Dredging Industry and Reclamation Contractors: Anchor handling tug supply vessels frequently shift CSD anchors and spuds during long deployments.
AHV X14. Offshore Oil and Gas Marine Operations: Anchor handling vessel without supply role; pure towage and anchor work.
AI Route Optimization E3. Technology, digitalization and smart shipping: Machine-learning weather-routing systems.
AI Voyage Charter Engine E3. Technology, digitalization and smart shipping: ML-based chartering decision support.
AI-ris X109. Maritime Autonomous Surface Ships and MASS Code: Sea Machines Robotics perception product line that uses computer vision and machine learning for marine object detection and classification.
AIAA Mesh Quality Metrics X54. Naval Architecture Software and IACS Rules: Generic mesh quality measures (skewness, aspect ratio, orthogonality) reported by CFD preprocessors including ANSYS Meshing and STAR-CCM+.
Aibel X42. Offshore Wind Installation and Cable Lay: Norwegian topside fabricator that has delivered HVDC converter platforms for Dogger Bank and DolWin projects.
AIBN X12. Maritime Casualties and Investigation: Accident Investigation Board Norway, the former name of the Norwegian Safety Investigation Authority (NSIA) before 2023.
Aichi Kaiun X135. Chemical Tanker Operators and IBC Code Cargoes: Japanese owner of small stainless coastal chemical tankers in the 1,000 to 3,000 dwt range trading Japanese petrochemical complexes for Mitsubishi Chemical and Mitsui Chemicals.
Aid to Seafarers X154. Maritime Welfare, Seafarer Charities, and MLC Rights: General welfare category covering medical, financial, and repatriation assistance provided by charities and unions.
AIDA Cruises X24. Cruise, Passenger Ship and Ferry Operations: German contemporary brand within Carnival Corporation, headquartered in Rostock.
AIDA Cruises LNG Fleet X110. LNG Bunkering Infrastructure and Vessels: AIDA Cruises operates LNG dual-fuel cruise ships including AIDAnova and AIDAcosma built at Meyer Werft Papenburg.
AIDAaura X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises ship delivered in 2003, later sold to a Chinese operator in 2023.
AIDAbella X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class ship delivered in 2008.
AIDAblu X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class vessel delivered in 2010.
AIDAcara X64. Cruise Industry Operators, Brands and Ships: First purpose-built AIDA Cruises ship, delivered in 1996.
AIDAcosma X64. Cruise Industry Operators, Brands and Ships: Helios-class LNG-powered AIDA Cruises ship delivered in 2021.
AIDAdiva X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class ship delivered in 2007.
AIDAluna X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class ship delivered in 2009.
AIDAmar X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class ship delivered in 2012.
AIDAmira X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises ship transferred from Costa neoRiviera, sold in 2023.
AIDAnova X64. Cruise Industry Operators, Brands and Ships: First Helios-class LNG dual-fuel AIDA Cruises ship delivered in 2018.
AIDAperla X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Hyperion-class ship delivered in 2017.
AIDAprima X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Hyperion-class ship delivered in 2016.
AIDAsol X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class ship delivered in 2011.
AIDAstella X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises Sphinx-class ship delivered in 2013.
AIDAvita X64. Cruise Industry Operators, Brands and Ships: AIDA Cruises ship delivered in 2002, later sold to a Chinese operator.
AIDC (Automatic Identification and Data Capture) X46. Container Terminal Operations: The family of technologies including OCR, RFID, barcodes, and biometrics used at container terminals to capture identifiers without manual keying.
Aids to navigation C4. Ports, terminals and coastal/marine civil engineering: AtoN, IALA classified marine aids.
Aids to Navigation (AtoN) B3. Nautical Science: Buoys, beacons, lights, fog signals, racons.
AIG Marine X117. Marine Insurance Markets, Captives and Reinsurance: American International Group's marine unit, a leading cargo and hull writer in the US admitted market.
AIG Maritime CyberRisk X107. Maritime Cybersecurity and OT Security: Cyber insurance product line offered by AIG addressing marine operator exposures.
Aigaion X130. National Coast Guards and Cutter Fleets: Hellenic Coast Guard offshore patrol vessel of the Aegean-class, built by Elefsis Shipyards and delivered 2003.
AIMU X117. Marine Insurance Markets, Captives and Reinsurance: American Institute of Marine Underwriters, the US trade body for ocean marine insurers, publisher of AIMU clauses and statistics.
AIMU (American Institute of Marine Underwriters) X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: New York-based US marine market association founded 1898.
AIMU Cargo Clauses X117. Marine Insurance Markets, Captives and Reinsurance: Standardized US ocean cargo wordings published by AIMU, including the AIMU 2004 Cargo Clauses for all risks.
Aioi Works X113. Drydock and Ship Repair Yards: IHI Corporation shipyard in Hyogo Prefecture, Japan, historically associated with large tanker and bulker construction and repair.
AIP X11. Naval Vessels, Warship Systems and Naval Architecture: Air-independent propulsion enabling submerged endurance without snorkeling.
AIP (Air-Independent Propulsion) E2. Naval, defence and maritime law enforcement: Submarine propulsion enabling extended submerged endurance.
Air Bag Inflator X75. IMDG Code, Classes, Packing and Segregation: UN 0503 Class 1.4G or UN 3268 Class 9, safety device with specific IMDG special provisions.
Air Bag Lifting X104. Project Cargo Forwarders and Heavy Transport: Use of inflatable bags to raise a load incrementally for cribbing or trailer insertion.
Air Bag, Dunnage X1. Cargo Science, Commodities and Cargo Care: Inflatable bag used to fill voids between containerized or breakbulk cargo.
Air Blast Cleaning X88. Marine Surface Preparation and Coatings Application: Open-nozzle dry abrasive blast cleaning method covered by ISO 8504-2 in which compressed air propels abrasive through a nozzle against the substrate.
Air bottle X19. Engine Room Watchkeeping and UMS Operations: Starting air receiver, typically two of 30 bar working pressure for main engine and one for auxiliaries.
Air bubble lubrication (ABL) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Retrofittable Mitsubishi MALS-type system.
Air Cap X88. Marine Surface Preparation and Coatings Application: Component of a conventional or HVLP spray gun that directs shaping air onto the atomized paint fan.
Air Caster X104. Project Cargo Forwarders and Heavy Transport: Pneumatic film bearing that floats heavy modules across a smooth floor inside fabrication halls.
Air change rate X26. Reefer Containers and Cold Chain Logistics: Volume of outside air introduced per hour via fresh-air vent, typically 0 to 280 m3/hr on modern reefers.
Air Charter Broker X104. Project Cargo Forwarders and Heavy Transport: Intermediary who sources outsize freighter capacity such as An-124 or 747F for project shipments.
Air Circuit Breaker X67. Marine Electrical Systems and Shore Power: Low-voltage breaker that interrupts fault current in atmospheric air, used as the main breaker on most LV marine switchboards.
Air circulation rate X26. Reefer Containers and Cold Chain Logistics: Internal evaporator fan throughput; on a 40RH unit roughly 4,500 to 5,500 m3/hr at high speed.
Air Compressor X63. Marine Auxiliary Machinery and Pumps: Reciprocating or screw machine that delivers compressed air for starting, control, service, and instrument duties.
Air Conditioning Refrigerant Recovery X50. Ship Recycling, Demolition and Hong Kong Convention: The mandatory recovery of R-22, R-134a, R-404A, and other refrigerants under IHM Part I controls and the Montreal Protocol obligations.
Air Conveyed Skimmer X126. Marine Oil Spill Response and OPRC Regimes: Skimmer powered by compressed air rather than hydraulics, common on the Lamor LRB and Elastec Magnum models for ATEX zones.
Air Cooled Alternator X67. Marine Electrical Systems and Shore Power: Marine synchronous generator using ambient air rather than water-air heat exchangers for stator cooling.
Air cooler (charge air) B2. Marine Engineering: Heat exchanger between turbocharger and engine intake.
Air Cooler (Compressor) X63. Marine Auxiliary Machinery and Pumps: Intercooler or aftercooler that removes heat of compression between or after compressor stages.
Air cooler cleaning X19. Engine Room Watchkeeping and UMS Operations: Periodic chemical or mechanical cleaning of scavenge air cooler to restore charge air pressure.
Air Cooler Fouling X69. EGCS Scrubbers, SCR and Marine Air Emissions: Soot and sulfate deposition on charge air coolers that can be aggravated by high-sulfur fuel operation.
Air Curtain X41. Cruise Ship Public Health and VSP/USPH: Downward air stream over galley service doors used to deter flying insects from entering food preparation spaces.
Air Cushion X132. High-Speed Craft, Hydrofoils and Ferry Operators: Pressurised volume of air between the hull and the surface that lifts an ACV or SES off the water, reducing drag.
Air Diver X82. Saturation Diving and Offshore Diving Operations: IMCA category of diver qualified for surface-supplied air work to 50 m.
Air Diving X13. Marine Salvage and Wreck Removal: Surface-supplied diving to about 50 metres, standard for shallow salvage and survey.
Air draft B1. Naval Architecture: Vertical distance from waterline to highest fixed point of the ship.
Air draft check X32. Marine Pilotage and Pilot Operations: Pre-pilotage confirmation of vessel air draft against bridge clearances on the planned route.
Air Draft Limitation X1. Cargo Science, Commodities and Cargo Care: Vertical clearance constraint affecting container stack height on certain trades.
Air Draft Pilot Card X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Information sheet exchanged on boarding listing the vessel's air draft, beam, length, and draft so the pilot can verify under-keel and overhead clearances.
Air Draft Restriction X86. Port Agency, Husbandry and Disbursement: Vertical clearance limit at a berth or under a bridge that the agent confirms before vessel arrival.
Air draft, container stack X76. Stevedoring, Lashing and Cargo Securing: Vertical height from waterline to top of stowed containers, a stability and visibility limit on stack height.
Air drawing X38. Propellers, Stern Gear and Shaft Lines: Ventilation phenomenon in which atmospheric air is sucked down to a lightly submerged propeller, collapsing thrust.
Air dryer X19. Engine Room Watchkeeping and UMS Operations: Refrigerant or desiccant unit removing moisture from control air to prevent valve sticking.
Air Eductor X75. IMDG Code, Classes, Packing and Segregation: Pump using compressed air to remove spilled liquids in cargo holds per EmS spill schedules.
Air Emissions Inventory X118. Ship Recycling Yards, Beaches and Regulation: Mandatory HKC SRFP element listing PCDD/F, PAH, and metal-fume sources from cutting torches, required by IMO MEPC.210(63) Appendix 3.
Air Exchange Rate X1. Cargo Science, Commodities and Cargo Care: Number of hold-air changes per hour by ventilators; key to ventilation design.
Air Filter (Galley Hood) X120. Marine Catering, Provisions and Ship Chandlers: IMPA 174000-series mesh and baffle filters for SOLAS Chapter II-2 compliant range hoods.
Air gap X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Vertical distance from the fuel surface to the top of the tank, used in ullage measurement.
Air injection (rudder) X38. Propellers, Stern Gear and Shaft Lines: Becker technique of injecting air at the rudder leading edge to mitigate rudder cavitation erosion.
Air Lift X13. Marine Salvage and Wreck Removal: Compressed air dredge tool used to clear silt around grounded or sunken hulls.
Air Lift Bag X141. Marine Salvage Industry and Wreck Removal Contractors: Inflatable rubber bag rated up to 35 tonnes used by divers to refloat small wrecks and recover debris.
Air lift dredger X124. Dredging Industry and Reclamation Contractors: Compressed-air riser that lifts sediment by reduced-density airlift, used at depth in archaeology and deep-sea mining trials.
Air Liquide Ammonia Cracker X140. Ammonia as Marine Fuel and Hydrogen Shipping: Onshore reformer technology that decomposes NH3 back to hydrogen at 400 to 600 deg C for fuel-cell bunkering chains.
Air lock X56. LNG/LPG Carriers and IGC Code: Two-door compartment separating a gas-safe space from a gas-dangerous zone on a gas carrier, required by the IGC Code for entry to electrical equipment rooms.