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Glossary

Maritime glossary, terms beginning with A (page 15)

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

Showing 239 of 3739 terms (page 15 of 15).

Auto-Reject X40. Tanker Vetting, SIRE and VIQ
A screening outcome triggered by hard rules such as age, flag, class, or absence of a recent inspection, returned by an oil major's system without analyst review.
Auto-Steering AGV X46. Container Terminal Operations
An AGV variant employing differential GNSS and inertial navigation rather than embedded transponders for path following.
Auto-twist twistlock X76. Stevedoring, Lashing and Cargo Securing
Trade name family for fully automatic twistlocks that engage and release by container weight without manual handle action.
Auto-Twistlock X46. Container Terminal Operations
A semi-automatic or fully automatic twistlock that engages or releases by a defined mechanical motion of the spreader or container rather than by manual handle rotation.
AutoCAD X54. Naval Architecture Software and IACS Rules
Foundational 2D and 3D CAD platform from Autodesk underlying ShipConstructor and several shipyard production drawing workflows.
AutoChief X19. Engine Room Watchkeeping and UMS Operations
Kongsberg main engine remote control and safety system, current generation AutoChief 600.
AutoChief 600 X67. Marine Electrical Systems and Shore Power
Propulsion control system from Kongsberg Maritime that integrates with the K-Chief PMS on commercial ships.
Autoclave X36. Shipboard Medical, Telemedicine and Seafarer Health
Steam sterilizer for surgical instruments fitted on ships with hospital facilities.
Autodesk Inventor X54. Naval Architecture Software and IACS Rules
Parametric mechanical CAD from Autodesk used for shipboard equipment, foundations, and outfitting components.
Autodock X109. Maritime Autonomous Surface Ships and MASS Code
A class of automated berthing functions, exemplified by Wartsila SmartDock and Kongsberg Autodocking, that bring a ship alongside under autonomy supervision.
AutoFresh X136. Reefer Vessels and Cool Chain Operators
Daikin controlled atmosphere system fitted to LXE10E reefer units, regulating CA conditions for sensitive produce such as avocados and asparagus.
Autogate X15. Ports, Terminals and Stevedoring
automated terminal gate using OCR and RFID without manual check-in.
Autoignition temperature X2. Marine Bunker Fuels, Lubricants and Bunkering Operations
Lowest temperature at which a fuel ignites without external spark, distinct from flash point.
Automated Guided Vehicle (AGV) E3. Technology, digitalization and smart shipping
Driverless horizontal-transport vehicle in container terminals.
Automated Measuring System (AMS) X69. EGCS Scrubbers, SCR and Marine Air Emissions
Continuous instrumentation chain qualified for regulatory emission reporting on board ship.
Automated mooring X15. Ports, Terminals and Stevedoring
vacuum or magnetic mooring systems such as Cavotec MoorMaster.
Automated Mooring System (AMS) E3. Technology, digitalization and smart shipping
Vacuum or magnetic shore-side mooring (e.g., MoorMaster).
Automated terminal X15. Ports, Terminals and Stevedoring
container terminal where horizontal transport and stacking are unmanned.
Automated Twistlock Platform X169. Container Terminal Cranes, Yard Equipment, and Lashing
Quayside station where dockers fit or remove twistlocks while the spreader hovers, separating personnel from the lift path.
Automatic Beam Switching X68. Maritime Satcom and Telecommunications
Capability of a VSAT terminal to migrate between satellite beams or satellites as the vessel transits coverage boundaries.
Automatic Chlorinator X41. Cruise Ship Public Health and VSP/USPH
Mechanical or electronic device that maintains halogen residual in potable and recreational water systems.
Automatic Filter X63. Marine Auxiliary Machinery and Pumps
Self-cleaning back-flushing filter fitted upstream of fuel injection systems and purifiers.
Automatic Gain Control X68. Maritime Satcom and Telecommunications
Receiver function that adjusts amplifier gain to compensate for varying signal strength.
Automatic Identification System X22. Piracy, Maritime Security and Armed Protection
VHF data system mandated by SOLAS Chapter V for vessels of 300 GT and above on international voyages.
Automatic Identification System Decommissioning X50. Ship Recycling, Demolition and Hong Kong Convention
The deregistration and removal of AIS transponders before delivery to the yard, listed under Part III stores controls.
Automatic Jigging Machine X87. Fishing Vessels and Fisheries Management
Computer controlled reel used on squid jiggers to oscillate lures with multiple barbless hooks.
Automatic lubricator X61. Marine Lubricants and Cylinder Oils
Mechanical or electronic device that delivers metered quantities of oil to specified injection points on an engine cylinder.
Automatic Potential Control X100. Marine Cathodic Protection and Anodes
An ICCP control mode in which the rectifier adjusts output current to hold the structure potential at a fixed reference value.
Automatic stacking crane X76. Stevedoring, Lashing and Cargo Securing
Rail-mounted yard crane operating without an onboard driver, common in modern container terminals.
Automatic Twistlock (ATL) X9. Cargo Securing, Lashing and Stability Vocabulary
Container fitting that locks automatically on landing without manual operation.
Automatic Voltage Regulator X67. Marine Electrical Systems and Shore Power
Closed-loop controller that maintains a synchronous generator terminal voltage by adjusting excitation current.
Automation Network X107. Maritime Cybersecurity and OT Security
Shipboard segment carrying control traffic for engine, cargo, and bridge systems.
Automation Vendor X139. Maritime Cybersecurity, OT Threats and Standards
Supplier of OT components such as Kongsberg, Wartsila, ABB, or Siemens, each constituting a product supplier under IEC 62443-4-1.
AUTOMOST X109. Maritime Autonomous Surface Ships and MASS Code
A European collaborative project investigating autonomous ship modules and onboard systems for short sea shipping.
Autonomous Bollard Pull Test X109. Maritime Autonomous Surface Ships and MASS Code
A workboat trial procedure adapted to validate autonomous tug control through measured pull cycles without a helmsman.
Autonomous Coastal Vessel X109. Maritime Autonomous Surface Ships and MASS Code
A general category of MASS designed for short sea operation within national waters, exemplified by the Yara Birkeland.
Autonomous Collision Avoidance Module X109. Maritime Autonomous Surface Ships and MASS Code
The software subsystem that executes Rule 8 maneuvers based on the fused situational picture and the host vessel kinematics.
Autonomous Mooring Line Handling X109. Maritime Autonomous Surface Ships and MASS Code
Shore-side or ship-side automation of mooring operations that complements unmanned bridge operation in port.
Autonomous Surface Ship X25. Maritime Cybersecurity, OT and IT
Vessel operating with varying degrees of autonomy, subject to the IMO MASS Code due for adoption May 2026.
Autonomous Surface Vessel X48. Maritime Cybersecurity
Uncrewed or minimally crewed ship whose dependence on remote command links concentrates cyber risk on shore control centers and satcom paths.
Autonomous Surface Vessel (MASS) B3. Nautical Science
IMO-defined classification of autonomous ships.
Autonomous Tug X109. Maritime Autonomous Surface Ships and MASS Code
A harbor tug equipped to operate with reduced or no onboard crew, demonstrated in the Singapore JR Tug trials and by Sea Machines deployments.
Autonomous Tug Trials, Singapore X30. Tug Operations and Harbour Towage
Svitzer remote operation trials conducted in Singapore from 2023.
Autonomous Underwater Vehicle (AUV) Survey X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines
Pre-lay seabed mapping conducted by AUVs equipped with multibeam, sidescan sonar, and sub-bottom profilers for cable and pipeline routing.
Autonomous Vessel Notation X109. Maritime Autonomous Surface Ships and MASS Code
A class society designation indicating that a ship has been built and equipped to a published autonomy standard.
Autonomous Vessel Simulator X55. Marine Simulators, Training and Maritime Academies
Specialized simulator configuration used to train remote operators and shore control center personnel for Maritime Autonomous Surface Ships.
Autonomy Stack X109. Maritime Autonomous Surface Ships and MASS Code
The layered software architecture of perception, situational awareness, decision, and control modules that together implement autonomous vessel behavior.
Autopilot X16. Nautical Science, Navigation and COLREGs
Automatic steering system using gyro or magnetic compass input.
Autopilot interaction (maneuvering) B1. Naval Architecture
Coupling of course-keeping controller with hull dynamics in standard maneuvers.
Autorotation X31. Helicopter Operations on Ships
Emergency descent technique using airflow through unpowered rotor to maintain rotor RPM.
Autoroute Planning X109. Maritime Autonomous Surface Ships and MASS Code
The MASS function that generates a passage plan compliant with SOLAS V/34 from departure to arrival including waypoints, speeds, and contingency tracks.
AUTOSHIP X109. Maritime Autonomous Surface Ships and MASS Code
An EU Horizon 2020 project that designed and demonstrated next generation autonomous ships for short sea and inland waterway operation.
Autostrada del Mare X85. Ferries, Ro-Pax Operators and Routes
Italian Motorways of the Sea concept subsidizing ro-pax freight on coastal routes to reduce road traffic.
Autotroph X10. Marine Biology, Fisheries and Oceanography
Organism that synthesizes organic matter from inorganic carbon using light or chemical energy.
AUV X10. Marine Biology, Fisheries and Oceanography
Autonomous Underwater Vehicle.
AUV62-MR X65. ROVs, AUVs, USVs and Marine Robotics
Saab mine reconnaissance AUV based on the AUV62 platform with synthetic aperture sonar payload.
Auvergne X106. Naval Surface Combatants
French Navy FREMM frigate D654, commissioned 2017 by Naval Group at Lorient.
Auxiliary X84. Yacht Racing, Regattas and Sailing Governance
A sailing yacht equipped with an engine for use when sailing is impractical.
Auxiliary anode X45. Marine Paints, Coatings and Antifouling
Additional sacrificial or impressed current anode added to protect localized areas with high current demand.
Auxiliary block X58. Shipbuilding Yards and Construction
Subassembly housing auxiliary machinery rooms outfitted on the hardstand before erection.
Auxiliary blower B2. Marine Engineering
Electrically driven blower for two-stroke engine starting and low load.
Auxiliary boiler B2. Marine Engineering
Oil-fired boiler for steam at sea when waste-heat is insufficient.
Auxiliary Boiler Bypass X69. EGCS Scrubbers, SCR and Marine Air Emissions
Stack arrangement allowing oil-fired boiler exhaust to bypass the scrubber when not required.
Auxiliary Chamber X103. US Inland Waterway Towing and Barge
The smaller secondary lock chamber alongside the main chamber, often 600 by 110 feet on the Upper Mississippi River system.
Auxiliary Cooling Pump X63. Marine Auxiliary Machinery and Pumps
Electrically driven pump providing cooling water at port when main engine pumps are stopped.
Auxiliary engine B2. Marine Engineering
Medium-speed engine driving a generator.
Auxiliary engine oil X61. Marine Lubricants and Cylinder Oils
Trunk piston engine oil used in medium-speed gensets, typically 30 to 40 BN depending on fuel sulfur.
Auxiliary Engine Overhaul X113. Drydock and Ship Repair Yards
Drydock workscope covering generator engine top-end, bottom-end, turbocharger, and cooler refurbishment under controlled conditions ashore.
Auxiliary Engine Power X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation
Power consumed by generators and supporting machinery, included in EEDI and CII calculations through prescribed correction factors.
Auxiliary Engine Removal X50. Ship Recycling, Demolition and Hong Kong Convention
The disassembly of diesel generator sets for resale as reconditioned units, typical at Alang and Aliaga.
Auxiliary Engine Scrubber X69. EGCS Scrubbers, SCR and Marine Air Emissions
Dedicated EGCS branch treating exhaust from generator sets in addition to or separately from the main engine.
Auxiliary Feed Pump X63. Marine Auxiliary Machinery and Pumps
Standby feed water pump arranged in parallel with the main boiler feed pump.
Auxiliary Foil X132. High-Speed Craft, Hydrofoils and Ferry Operators
Smaller forward or stern foil on a hydrofoil that complements the main lifting foil, common on the Boeing 929 Jetfoil's canard arrangement.
Auxiliary Hoist X94. Port Machinery and Quay Equipment Makers
Secondary hoisting mechanism on tandem-lift STS cranes used for trim and list adjustment of the headblock.
Auxiliary Lashing X9. Cargo Securing, Lashing and Stability Vocabulary
Secondary lashing supplementing primary securing.
Auxiliary Machinery Deficiency X66. Port State Control and Regional MOUs
13000 series deficiency covering auxiliary engines, generators, and pumps.
Auxiliary Maritime Patrol Aircraft E1. Maritime security, geopolitics and risk
Civilian or contracted aircraft supporting MDA missions.
Auxiliary medical attendant X36. Shipboard Medical, Telemedicine and Seafarer Health
STCW VI/4-2 trained officer designated to deliver onboard medical care.
Auxiliary push-barge X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping
A dumb barge fitted with limited steering propellers used to assist a pusher in tight bends of the Rhine or Danube.
Auxiliary sea chest X18. Ballast Water, Biofouling and Antifouling
Smaller sea chest serving auxiliary cooling systems, identified as a niche area in biofouling management.
Auxiliary Steam Header X63. Marine Auxiliary Machinery and Pumps
Distribution manifold downstream of the auxiliary boiler serving fuel heating, accommodation, and tank heating.
Auxiliary Stores Locker X120. Marine Catering, Provisions and Ship Chandlers
Forward or aft storeroom for cleaning chemicals and deck consumables, separate from refrigerated provisions.
Auxiliary thruster X65. ROVs, AUVs, USVs and Marine Robotics
Secondary propulsor on an ROV or AUV that augments primary axes for fine maneuvering near a worksite.
Auxiliary Watchkeeper X160. Maritime Academies, Universities, and STCW Certification
Older UK CoC tier preceding the OOW Unlimited license, now folded into modern STCW deck and engine pathways.
Auxiliary Winch X14. Offshore Oil and Gas Marine Operations
Smaller winch on AHTS used for tugger work and anchor pendant handling.
Auxpac X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring
Wartsila packaged auxiliary generator set offered with 20, 26, and 32 series engines for shipboard electrical power, with major overhauls at 24,000 hours.
AvA Yachts X156. Superyacht Industry, Builders, and Yacht Charter Market
Turkish builder based in Antalya producing custom steel and aluminum motor yachts in the 40 to 90 meter range.
Availability X19. Engine Room Watchkeeping and UMS Operations
Fraction of operating time a machinery item is ready to perform its function.
Availability Class X109. Maritime Autonomous Surface Ships and MASS Code
A reliability category used in class society autonomy rules expressing how much of the time the autonomy system is required to be operable.
Availability energy based X59. Offshore Wind O&M, CTVs and SOVs
Reliability metric expressing the fraction of theoretical energy a turbine could have produced that it actually delivered, accounting for downtime weighted by wind resource.
Availability factor (marine renewable) X57. Ocean Energy Beyond Wind
Fraction of time a tidal or wave device is technically capable of generating, a key metric reported at EMEC and MeyGen.
Availability time based X59. Offshore Wind O&M, CTVs and SOVs
Reliability metric expressing the fraction of clock hours during which a turbine was technically capable of generating, regardless of wind conditions.
Available draft X15. Ports, Terminals and Stevedoring
maximum permitted vessel draft at a given berth or channel tide window.
Available Potential Energy D1. Physical and chemical oceanography and marine meteorology
Portion of total potential energy that could be converted to kinetic energy under adiabatic adjustment.
Avance Gas X56. LNG/LPG Carriers and IGC Code
Bermuda-based VLGC owner and operator listed in Oslo, with a fleet trading LPG on long-haul export routes from the US Gulf and Middle East.
Avangrid X42. Offshore Wind Installation and Cable Lay
US renewable energy developer, partner with Copenhagen Infrastructure Partners on Vineyard Wind 1.
Avanti Feeds X131. Commercial Fisheries, Trawler Fleets and Seafood Processors
Indian shrimp feed producer (joint venture with Thai Union) supplying roughly 50% of the Indian vannamei feed market.
Avast X39. Pre-1900 Maritime History
A traditional shipboard command meaning to cease or stop an action, of uncertain Dutch or Italian origin.
AVAST Seafarers' Center X102. Seafarer Welfare and Maritime Charities
Common naming pattern for shore-side hospitality lounges run by maritime ministries in ports such as Halifax and Vancouver.
AVCS X73. Marine Hydrography, Charting and ENC
Admiralty Vector Chart Service.
AVCS DVD X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS
Weekly DVD distribution of UKHO AVCS ENCs to vessels with limited connectivity.
AVCS Online X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS
UKHO online ENC delivery via permit-based downloads.
AVCS Pilot Chart X159. Marine Pilotage, Pilot Districts, and Pilots' Associations
Admiralty Vector Chart Service ENC product subset specifically catalogued for pilotage districts and approach channels.
Avedore X42. Offshore Wind Installation and Cable Lay
Danish port site for offshore wind component logistics adjacent to Copenhagen.
Avenger class X11. Naval Vessels, Warship Systems and Naval Architecture
USN MCM-1 mine countermeasures ship.
Avenir Achievement X56. LNG/LPG Carriers and IGC Code
7,500 cubic meter small-scale LNG carrier and bunker vessel delivered to Avenir LNG in 2021.
Avenir Advantage X110. LNG Bunkering Infrastructure and Vessels
7,500 m3 LNG carrier and bunker vessel in the Avenir LNG fleet.
Avenir Albireo X110. LNG Bunkering Infrastructure and Vessels
7,500 m3 LNG carrier and bunker vessel in the Avenir LNG fleet.
Avenir Aldebaran X110. LNG Bunkering Infrastructure and Vessels
7,500 m3 LNG carrier and bunker vessel in the Avenir LNG fleet.
Avenir Allegiance X110. LNG Bunkering Infrastructure and Vessels
LNG carrier and bunker vessel in the Avenir LNG fleet.
Avenir Aspiration X110. LNG Bunkering Infrastructure and Vessels
LNG carrier and bunker vessel in the Avenir LNG fleet.
Avenir LNG X56. LNG/LPG Carriers and IGC Code
Small-scale LNG shipping and supply company majority owned by Stolt-Nielsen and Golar LNG, operating LNG bunker vessels including Avenir Achievement.
Avenir Maritime College X121. Maritime Education, Academies and Universities
French private maritime training provider in Saint-Malo offering STCW Basic Safety and Yachtmaster preparation.
Avenir Possession X110. LNG Bunkering Infrastructure and Vessels
LNG carrier and bunker vessel in the Avenir LNG fleet.
Average A5. Maritime Law, private and commercial
Loss apportioned in general or particular average under York-Antwerp Rules.
Average Acceleration X9. Cargo Securing, Lashing and Stability Vocabulary
Statistical mean acceleration used in CSS Annex 13 tabulated values.
Average Adjuster X4. Marine Insurance, P&I and Claims
independent professional who prepares general average and complex particular average statements.
Average Adjuster Practitioner X108. Marine Insurance and P&I Clubs
A title used by qualified adjusters practicing in the London market under the Association of Average Adjusters rules.
Average Adjuster Survey Liaison X43. Marine Surveying and Warranty Surveying
The coordination between the appointed average adjuster and casualty surveyors to gather evidence supporting general average or particular average claims.
Average annual energy production X42. Offshore Wind Installation and Cable Lay
Long term mean electricity output of a wind farm used in financial modeling.
Average Bond X53. Marine Insurance, P&I and Hull Clauses
A written undertaking by cargo interests to pay their general average contribution once adjusted, given in exchange for delivery of the goods.
Average Bond (Lloyd's Form) X4. Marine Insurance, P&I and Claims
agreement by cargo interests to pay any contribution due in general average, executed on Lloyd's Average Bond form.
Average Cargo Temperature X115. Marine Bunker and Cargo Surveying
Volumetrically weighted mean temperature of all tanks holding the same cargo grade, used in volume-to-mass conversion calculations.
Average Deposit X157. Marine Loss Adjusters, GA Practice, and Casualty Firms
Cash sum collected from cargo interests as security for general average contribution prior to release of cargo.
Average Disbursements X4. Marine Insurance, P&I and Claims
expenses incurred in collecting general average contributions, themselves admissible in general average.
Average Disbursements Account X157. Marine Loss Adjusters, GA Practice, and Casualty Firms
Ledger maintained by the shipowner recording payments at port of refuge and other GA-related expenditures.
Average Earnings X44. Shipping Indices, FFAs and Freight Markets
A reported daily dollar figure summarizing the mean Time Charter Equivalent across the constituent routes of a Baltic sub-index.
Average Guarantee X4. Marine Insurance, P&I and Claims
written undertaking, typically by cargo underwriters, to pay the cargo's general average contribution.
Average Statement X157. Marine Loss Adjusters, GA Practice, and Casualty Firms
The final published adjustment document setting out contributions and allowances in a GA case.
Average Tariff Rate (ATR) X44. Shipping Indices, FFAs and Freight Markets
Worldscale terminology for the published nominal flat rate against which percentage assessments are quoted for tanker voyages.
AVEVA Diagrams X54. Naval Architecture Software and IACS Rules
Schematic diagramming module within the AVEVA Marine and AVEVA Plant suites used for P&IDs and electrical schematics.
AVEVA E3D Design X54. Naval Architecture Software and IACS Rules
Enterprise 3D plant and marine design platform from AVEVA, successor architecture to PDMS and AVEVA Marine.
AVEVA Hull X54. Naval Architecture Software and IACS Rules
Hull design module within AVEVA Marine, derived from Tribon, supporting plate and stiffener modeling for production.
AVEVA Marine X54. Naval Architecture Software and IACS Rules
Integrated shipbuilding CAD/CAM suite from AVEVA combining hull, outfit, and diagrams capabilities derived from Tribon M3.
AVEVA Outfitting X54. Naval Architecture Software and IACS Rules
Module within AVEVA Marine for piping, HVAC, cable trays, and equipment arrangement modeling.
AVEVA PDMS X54. Naval Architecture Software and IACS Rules
Plant Design Management System, predecessor 3D plant design product from AVEVA still used in some yards and topsides projects.
Avia X124. Dredging Industry and Reclamation Contractors
Inland Dutch hopper dredger built for canal maintenance.
Aviation Cruiser E2. Naval, defence and maritime law enforcement
Hybrid combatant historically (e.g., Kiev class).
Aviation Light X116. Global Bunker Anchorages, Hubs and Supply Infrastructure
Marine distillate sometimes blended into MGO during winter spec in northern European bunker ports.
Aviation Regulated Liquid NOS X75. IMDG Code, Classes, Packing and Segregation
UN 3334, Class 9 liquid regulated only for air transport, generally not regulated under IMDG.
AVIC International Leasing X49. Ship Finance, Leasing and Maritime Capital Markets
Chinese leasing arm linked to the AVIC group with a maritime portfolio.
Avikus X109. Maritime Autonomous Surface Ships and MASS Code
A Hyundai Heavy Industries subsidiary developing autonomous navigation products including the HiNAS family.
Avincis X31. Helicopter Operations on Ships
Spanish-based helicopter operator group, owner of Babcock MCS aviation businesses.
Avior Marine X72. Bunkering Hubs and Bunker Suppliers
Marine fuel brand created in 2024 when World Fuel Services rebranded its bunkering business after the parent became Avior.
Avior World Fuel Services X72. Bunkering Hubs and Bunker Suppliers
Holding company that owns the Avior Marine bunker brand and the legacy World Fuel Services trading desks.
Avitas Systems X96. Hull Integrity Monitoring and Strain Gauges
Inspection services provider, originating from GE Ventures, that has used autonomous platforms including drones for asset inspection.
Aviva X125. Superyacht Industry, Builders and Brokers
98.4 m Abeking and Rasmussen delivered in 2017 to Joe Lewis, fitted with a full sized padel court.
Avocado carriage X26. Reefer Containers and Cold Chain Logistics
Typically 5 to 7 C, 85 to 90% RH; CA 3 to 5% O2 and 5 to 10% CO2 extends shelf life.
Avocado Reefer Boom X136. Reefer Vessels and Cool Chain Operators
Surge in global avocado reefer shipments since 2015, dominated by Mexico, Peru, Chile, and Kenya, requiring tight temperature control near 5 degrees Celsius.
Avocado reefer carriage X70. Reefer Containers and Cold Chain Shipping
Subtropical fruit transported between plus four and plus seven degrees Celsius with controlled atmosphere to delay ripening during transit.
Avoidance Maneuver X109. Maritime Autonomous Surface Ships and MASS Code
A discrete course or speed change generated by the autonomy stack to satisfy the COLREGs action to avoid collision requirement.
Avoidance Routing X22. Piracy, Maritime Security and Armed Protection
Practice of diverting from declared HRA boundaries where commercially feasible to reduce exposure.
Avoided emissions X34. Decarbonization, Alternative Fuels and Carbon Pricing
Emissions not released due to a mitigation measure, distinct from removals.
Avondale Shipyard X58. Shipbuilding Yards and Construction
Former Louisiana yard near New Orleans, closed by Huntington Ingalls in 2014 and later redeveloped.
Avsar Gemi Sokum X118. Ship Recycling Yards, Beaches and Regulation
Aliaga ship recycling facility historically listed on the EU List of Approved Ship Recycling Facilities.
AW101 X31. Helicopter Operations on Ships
Leonardo three-engine heavy helicopter, used as Norwegian SAR Queen and Canadian CH-149 Cormorant.
AW101 Merlin X62. Naval Warships and Combat Systems
Three-engine medium-lift helicopter operated in anti-submarine and utility roles by the Royal Navy and Italian Navy.
AW101 Merlin Mk2 X106. Naval Surface Combatants
AgustaWestland three-engine medium helicopter operated by the Royal Navy for ASW and airborne early warning roles.
AW139 X31. Helicopter Operations on Ships
Leonardo medium twin helicopter, 6.8 t MTOW, 15 passenger offshore standard.
AW159 Wildcat X62. Naval Warships and Combat Systems
Leonardo helicopter variant operated by the Royal Navy as the Wildcat HMA2 maritime helicopter.
AW189 X31. Helicopter Operations on Ships
Leonardo super-medium twin, 8.6 t MTOW, SAR and offshore transport variant.
Awaiting berth X15. Ports, Terminals and Stevedoring
vessel status when at anchor or drifting before a berth is available.
Award X51. Maritime Arbitration, Law and BIMCO Clauses
The final or partial decision of an arbitral tribunal disposing of issues referred to it.
Award Currency X99. Marine Salvage Awards and SCOPIC
Currency in which a Lloyd's salvage award is denominated, typically US dollars, pounds sterling, or euros.
Award on Agreed Terms X51. Maritime Arbitration, Law and BIMCO Clauses
A consent award embodying a settlement reached by the parties during the reference.
Award Publication X99. Marine Salvage Awards and SCOPIC
Limited disclosure of Lloyd's salvage awards, generally restricted to the parties and not published in full.
Awarded Sum X13. Marine Salvage and Wreck Removal
Final monetary salvage reward fixed by arbitration, paid by ship and cargo interests pro rata.
Awards for Excellence in Production (RINA) X119. Maritime Conferences, Trade Shows and Awards
Royal Institution of Naval Architects recognition presented at the annual dinner in London.
Awareness Bridge X127. Maritime Security, Anti-Piracy and PMSCs
BMP5 recommendation for additional lookouts on bridge wings during high-risk transits.
Awareness training X59. Offshore Wind O&M, CTVs and SOVs
Short induction module covering site specific risks and emergency procedures before any technician boards a CTV or SOV.
Awash X3. Ship Handling, Seamanship and Deck Vocabulary
With the surface just covered by water.
Away From X75. IMDG Code, Classes, Packing and Segregation
Segregation term in IMDG 7.2.1 requiring sufficient distance to prevent mutual hazardous interaction.
Away From (Segregation Code 1) X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers
Segregation requirement in Table 7.2.4 meaning effectively segregated so incompatible goods cannot interact dangerously but may be stowed in the same compartment or hold, provided a minimum…
AWB X6. Container, Intermodal and Trade Codes
Air waybill, used in air-sea intermodal moves and consolidations.
Aweather X3. Ship Handling, Seamanship and Deck Vocabulary
Toward the windward side.
Aweigh X3. Ship Handling, Seamanship and Deck Vocabulary
Said of an anchor just clear of the bottom.
AWES X29. Ship Sale and Purchase, Management Contracts and Valuation
Association of European Shipbuilders and Shiprepairers newbuilding contract form.
AWES Form X161. Shipbroking, Freight Derivatives, and Baltic Indices
Newbuilding contract form maintained by the Association of European Shipbuilders and Shiprepairers used by some European yards.
Awesense X78. Voyage Optimization and Vessel Performance Software
A data analytics company providing energy intelligence software, occasionally cited in maritime contexts for energy data integration.
Awning Deck Fairlead X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral
Fairlead positioned at upper deck level to redirect mooring lines from below to a shoreside hook or bollard.
AWO X103. US Inland Waterway Towing and Barge
See American Waterways Operators.
AWS A5.1 X92. Marine Steel Suppliers and Shipbuilding Plate
Specification for carbon steel electrodes for shielded metal arc welding including E7018 grades.
AWS A5.18 X92. Marine Steel Suppliers and Shipbuilding Plate
Specification for carbon steel electrodes and rods for gas shielded arc welding including ER70S-6.
AWS A5.20 X92. Marine Steel Suppliers and Shipbuilding Plate
Specification for carbon steel electrodes for flux cored arc welding including E71T-1.
AWS-2 X77. Naval Mine Warfare and Mine Countermeasures
The US Navy AN/ASQ-235 Airborne Mine Neutralization System designator group, used in conjunction with the MH-60S airframe.
AWT X101. Vessel Brokerage Software and Chartering Platforms
Applied Weather Technology, a weather routing provider acquired by StormGeo in 2015 and integrated with Veson IMOS voyage modules.
AXA XL X117. Marine Insurance Markets, Captives and Reinsurance
The specialty division of AXA formed from the 2018 acquisition of XL Catlin, a major marine hull and cargo carrier and Lloyd's Syndicate 2003.
AXA XL Marine X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets
AXA Group division formed after the 2018 XL Catlin acquisition.
Axe bow B1. Naval Architecture
Vertical, deep-forefoot bow form used on offshore supply vessels.
Axial bearing clearance X38. Propellers, Stern Gear and Shaft Lines
Permissible axial play of the shaft line at the thrust block, measured at the thrust collar.
Axial Clearance X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring
Crosshead and crankshaft thrust clearance measurement taken during dry-dock condition surveys to verify thrust bearing wear within OEM limits.
Axial Flow Pump X63. Marine Auxiliary Machinery and Pumps
Pump with propeller-type impeller producing high flow at low head, used for ballast and cooling water duties.
Axial flow tidal turbine X57. Ocean Energy Beyond Wind
Horizontal-axis tidal stream turbine in which flow passes parallel to the rotor shaft, the dominant architecture used by SAE Renewables and Andritz Hydro Hammerfest.
Axial Induction Factor X54. Naval Architecture Software and IACS Rules
Coefficient in propeller blade element momentum theory describing axial flow acceleration through the disk.
Axial inflow factor B1. Naval Architecture
Ratio relating mean axial velocity at propeller disk to ship speed.
Axial inflow velocity field X162. Naval Architecture, Stability, Resistance, and Structural Design
Time-averaged or instantaneous axial wake distribution at the propeller plane that drives wake-adapted blade design.
Axial pump B2. Marine Engineering
High-flow, low-head pump used for ballast and cooling duties.
Axial thrust (propeller) X38. Propellers, Stern Gear and Shaft Lines
Net longitudinal force delivered by the propeller and transferred through the thrust block to the hull.
Axial Vibration X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring
Longitudinal oscillation of the crankshaft along its axis monitored by ICVA sensors, with elevated levels indicating thrust bearing damage or torsional resonance.
Axiom Ince X157. Marine Loss Adjusters, GA Practice, and Casualty Firms
Successor firm to Ince & Co following the 2023 acquisition; entered administration in October 2023 amid regulatory intervention by the SRA.
Axle Line X104. Project Cargo Forwarders and Heavy Transport
One transverse row of wheels on an SPMT, typically rated 36 to 48 tonnes payload.
Axle Load X83. ISO Container Manufacturing and Leasing
Load transmitted by a chassis axle to the road surface, regulated nationally for road transport of laden containers.
Axle Load Calculation X104. Project Cargo Forwarders and Heavy Transport
Engineering computation distributing a project unit's weight across trailer axles for permitting.
Axle Spread X83. ISO Container Manufacturing and Leasing
Distance between chassis axles, governing permissible gross combination weight in many jurisdictions.
Azalea, USCGC (WLB-204) X130. National Coast Guards and Cutter Fleets
Juniper-class seagoing buoy tender commissioned 2000, homeported Astoria, Oregon.
Azamara X164. Cruise Industry, Brands, Ship Classes, and Terminals
A boutique upmarket cruise brand spun off from Royal Caribbean Group in 2021 and now owned by Sycamore Partners, operating four R class ships.
Azamara Cruises X64. Cruise Industry Operators, Brands and Ships
Upscale destination-focused cruise brand divested by Royal Caribbean Group in 2021 to Sycamore Partners.
Azane Fuel Solutions X140. Ammonia as Marine Fuel and Hydrogen Shipping
Norwegian joint venture between Yara and Amon Maritime developing standardized ammonia bunkering pontoons.
Azerbaijan State Marine Academy X121. Maritime Education, Academies and Universities
ASMA in Baku, founded 1996 within the Azerbaijan Caspian Shipping Company complex, training Caspian fleet officers.
Azimut X125. Superyacht Industry, Builders and Brokers
Avigliana, Italy based builder, the largest unit of Azimut Benetti Group, with the Grande, Magellano, and S series.
Azimut Yachts X35. Yacht and Superyacht Industry
Italian production builder in Avigliana, founded 1969 by Paolo Vitelli.
Azimut-Benetti Group X35. Yacht and Superyacht Industry
Italian group combining Azimut Yachts (production) and Benetti (custom superyachts), one of the largest yacht builders by volume.
Azimuth B3. Nautical Science
Bearing of a celestial body measured from true north.
Azimuth circle X16. Nautical Science, Navigation and COLREGs
Ring fitted over a compass repeater for taking bearings.
Azimuth Thruster X30. Tug Operations and Harbour Towage
Propulsion unit rotating 360 degrees about a vertical axis to direct thrust in any horizontal direction.
Azimuth Thruster Control X109. Maritime Autonomous Surface Ships and MASS Code
The low level command interface through which the autonomy stack actuates 360 degree thrusters such as the rotor azimuth fitted on the Yara Birkeland.
Azipod X38. Propellers, Stern Gear and Shaft Lines
ABB podded electric propulsor with the motor inside a submerged pod, used widely on cruise ships, icebreakers, and shuttle tankers.
Azipod D, M, XO, XL X38. Propellers, Stern Gear and Shaft Lines
Specific Azipod product variants ranging from drive-through gearing (D) to direct-drive megawatt-class XL units.
Azipull X38. Propellers, Stern Gear and Shaft Lines
Rolls-Royce/Kongsberg pulling-type azimuth thruster with a Z-drive gearbox and a tractor propeller.
Azithromycin X36. Shipboard Medical, Telemedicine and Seafarer Health
Macrolide antibiotic used for atypical pneumonia and traveler's diarrhea.
Azores Current X10. Marine Biology, Fisheries and Oceanography
Eastward warm current branching from the Gulf Stream system into the eastern North Atlantic.
Azura X64. Cruise Industry Operators, Brands and Ships
P&O Cruises UK ship delivered in 2010.
Azure Naval Architects X35. Yacht and Superyacht Industry
UK naval architecture studio specializing in large yacht hull and systems design.
Azzam X35. Yacht and Superyacht Industry
180 m Lurssen-built motor yacht delivered 2013 for Sheikh Khalifa bin Zayed Al Nahyan, long the world's longest private yacht.