Glossary

Maritime glossary, terms beginning with W (page 3)

All maritime glossary terms that begin with the letter W, drawn from every subject section. 1357 entries.

Showing 250 of 1357 terms (page 3 of 6).

Wear Ring X63. Marine Auxiliary Machinery and Pumps: Renewable ring on the impeller eye and casing limiting internal leakage in centrifugal pumps.
Wear-down gauge (poker gauge) X38. Propellers, Stern Gear and Shaft Lines: Tool to measure aft stern-tube bearing wear-down through the rope guard, recorded at each survey.
Weather X3. Ship Handling, Seamanship and Deck Vocabulary: Windward side; conditions; to pass to windward of.
Weather Criterion X9. Cargo Securing, Lashing and Stability Vocabulary: See Severe Wind and Rolling Criterion.
Weather Damage Survey X5. Marine Surveying and Inspection: Investigation of damage caused by heavy weather.
Weather deck X3. Ship Handling, Seamanship and Deck Vocabulary: Uppermost deck exposed to weather.
Weather downtime X59. Offshore Wind O&M, CTVs and SOVs: Period during which adverse weather prevents access to turbines, contributing to lost production.
Weather Helm F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Tendency of a sailing vessel to head into the wind.
Weather routeing X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: SOLAS V/34 references and IMO resolution A.528(13) recommend use of weather routeing services.
Weather routing B3. Nautical Science: Optimum-track routing per environmental forecasts.
Weather Routing for Tow X60. Marine Salvage and Wreck Removal: Forecast based routing of an ocean tow to avoid severe weather.
Weather Routing Liaison X86. Port Agency, Husbandry and Disbursement: Liaison with weather routing providers on vessel's behalf.
Weather Routing Project X104. Project Cargo Forwarders and Heavy Transport: Route planning for heavy lift voyages to avoid severe sea states.
Weather Routing Service X40. Tanker Vetting, SIRE and VIQ: A commercial routing service whose use is sometimes documented under VIQ Chapter 4.
Weather Routing Services X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: SaaS platforms (StormGeo, DTN, ABS Nautical Systems) whose API tokens, if stolen, can leak fleet operations.
Weather Routing Survey X43. Marine Surveying and Warranty Surveying: A documentary attendance reviewing weather routing performance and compliance with charter party warranties.
Weather Routing Verification X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: The SIRE 2.0 navigation chapter check verifying voyage weather routing is used and acted upon.
Weather shore X3. Ship Handling, Seamanship and Deck Vocabulary: Shore from which the wind is blowing.
Weather Tight Closure Test X5. Marine Surveying and Inspection: Hose or chalk test of weather tight closures.
Weather Tightness X155. Marine Surveying Practice and Cargo Inspection: The capability of a closure to prevent water ingress under specified conditions, less stringent than water tightness, the standard governing hatch covers under the Load Line Convention.
Weather window B3. Nautical Science: Period of suitable weather for an operation.
Weather working day C1. Commercial shipping, chartering, economics and finance: WWD, day of 24 hours suitable for cargo work.
Weather Working Days X60. Marine Salvage and Wreck Removal: Charter party concept relevant to tow contract operations.
Weather Working Days (WWD) X17. Chartering, Shipbroking and Freight Trading: Laytime basis counting only days on which weather permits work.
Weatherdeck Inspection X5. Marine Surveying and Inspection: Examination of main deck, hatches, vents, and outfit.
WeatherFlow X78. Voyage Optimization and Vessel Performance Software: A meteorological data company with maritime and coastal forecasting offerings.
Weathering X126. Marine Oil Spill Response and OPRC Regimes: Combined processes (evaporation, dissolution, dispersion, emulsification, photo-oxidation, biodegradation, sedimentation, sinking) altering spilled oil composition.
Weathering steel X45. Marine Paints, Coatings and Antifouling: Corten-type steel sometimes used in superstructure components; not generally a hull material.
WeatherNews (WNI) X96. Hull Integrity Monitoring and Strain Gauges: Japanese weather services company providing marine forecasts and voyage routing.
Weathernews Inc X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: WNI Japanese marine weather services provider offering ship routing and voyage performance analytics.
Weathertight Deficiency X66. Port State Control and Regional MOUs: 03000 series deficiency category.
Weathertight Door A2. Maritime safety legislation: SOLAS and its codes: Equipment under SOLAS II-1/13.
Weathervaning X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Tendency of a moored vessel, especially on a single point mooring, to align with the prevailing environmental load.
Web Application Firewall X48. Maritime Cybersecurity: Filter that inspects HTTP traffic to web applications for malicious patterns.
Web Application Firewall (WAF) X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: A shoreside control for shipping company portals and booking systems.
Web Deflection X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Crankshaft alignment check using a dial indicator between adjacent webs across six crank angles to detect bearing or bedplate movement.
Web Filtering X68. Maritime Satcom and Telecommunications: Onboard content filtering applied to traffic before it crosses the satellite link.
Web frame X45. Marine Paints, Coatings and Antifouling: Internal stiffening member whose edges are stripe-coated during tank preparation.
Web Frame Crack X96. Hull Integrity Monitoring and Strain Gauges: Fatigue crack initiating in tanker or bulker transverse web frames at high stress locations.
Web Lashing X1. Cargo Science, Commodities and Cargo Care: Tensioned synthetic webbing for vehicles and breakbulk.
Webasto X63. Marine Auxiliary Machinery and Pumps: German manufacturer of thermal management systems including some marine heating units.
Weber Report X71. Shipbrokers and Brokerage Firms: Weekly tanker market report published by Charles R. Weber.
WEBI duct (Wartsila Energy Boost Injector) X38. Propellers, Stern Gear and Shaft Lines: Generic; omit if not a verified product name.
WEC X57. Ocean Energy Beyond Wind: Wave energy converter, a general class of devices that extract energy from sea surface waves.
WEDA X175. Port Engineering, Dredging, Breakwaters, and Quays: Western Dredging Association, the Americas branch of WODA.
Weddell Sea X10. Marine Biology, Fisheries and Oceanography: Sea bordering Antarctica's Weddell Sector; formation region for Antarctic Bottom Water.
Weddell Sea Bottom Water D5. Coastal processes, sea-level, cryosphere and ocean observation science: Dense water mass formed in the Weddell Sea.
Weddell Sea Polynya D1. Physical and chemical oceanography and marine meteorology: Recurrent open-water area within Antarctic sea ice.
Weddell Seal X97. Polar Expedition Cruise and IAATO Operations: True Antarctic seal (Leptonychotes weddellii) found resting on fast ice in the Ross and Weddell seas.
Wedge X9. Cargo Securing, Lashing and Stability Vocabulary: Tapered block for chocking cargo.
Wedge Block X169. Container Terminal Cranes, Yard Equipment, and Lashing: Lashing accessory used to fill gaps between non-standard cargo and a container floor or deck.
Wedge formula X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Calculation correcting bunker quantities for trim and list.
Wedgwood, Josiah X39. Pre-1900 Maritime History: Staffordshire potter whose oceanic export trade depended on the East India Company and the Atlantic packet system.
Weekly S&P report X71. Shipbrokers and Brokerage Firms: Standard broker product summarizing sale and purchase activity by sector.
Weekly test of equipment C2. Ship operations, crewing and technical management: Recorded tests of safety equipment.
Weekly tests X19. Engine Room Watchkeeping and UMS Operations: Functional tests of emergency generator, fire pump, steering gear, and alarms.
Weeks Marine X124. Dredging Industry and Reclamation Contractors: Cranford NJ-based US dredging contractor, third major after GLDD and Manson.
Weeping Cargo X1. Cargo Science, Commodities and Cargo Care: Liquid cargo seeping through bags or drums.
Weibull distribution B1. Naval Architecture: Long-term distribution used for wave-load extremes.
Weigh anchor X3. Ship Handling, Seamanship and Deck Vocabulary: Heave the anchor off the bottom.
Weighbridge X15. Ports, Terminals and Stevedoring: certified scale for trucks at the gate.
Weight bridge ticket C3. Logistics, freight forwarding and multimodal trade: Certified weighbridge slip used for VGM.
Weight by Measurement X115. Marine Bunker and Cargo Surveying: Cargo measurement method based on volume and density rather than direct weighing, used in liquid bulk and many dry bulk trades.
Weight cargo X6. Container, Intermodal and Trade Codes: Cargo rated by weight rather than volume.
Weight check sheet X76. Stevedoring, Lashing and Cargo Securing: Document reconciling declared container weights with planning and crane-measured weights.
Weight Distribution Plan X104. Project Cargo Forwarders and Heavy Transport: Drawing showing how a project unit's weight is shared across trailer axles.
Weight estimate B1. Naval Architecture: Engineering rollup of structure, machinery, and outfit weights.
Weight Per Move (WPM) X46. Container Terminal Operations: A productivity metric expressing the average weight handled per crane lift, used to track twin and tandem lift uptake.
Weight Tolerance Heavy Lift X104. Project Cargo Forwarders and Heavy Transport: Allowable difference between certified and measured weight of a project unit.
Weight, gross X76. Stevedoring, Lashing and Cargo Securing: See gross mass, container.
Weighted Time Charter Average X44. Shipping Indices, FFAs and Freight Markets: Methodology of weighting individual time charter route TCEs by liquidity or fleet relevance when constructing Baltic sub-indices.
Weir Skimmer X126. Marine Oil Spill Response and OPRC Regimes: Skimmer using a weir set just below the oil-water interface and a pump to lift the upper layer.
Welch X103. US Inland Waterway Towing and Barge: A Minnesota town on the Upper Mississippi River adjacent to Lock and Dam 3.
Welcoming joint X122. Submarine Cable Laying, Repair Vessels and Operators: ASN slang for the first joint of a repair, where the cable end recovered from the seabed is joined to the new bight.
Welcon X42. Offshore Wind Installation and Cable Lay: Danish wind tower fabricator delivering offshore tower sections.
Weld bead X45. Marine Paints, Coatings and Antifouling: Raised seam of weld metal whose edges must be ground smooth before coating.
Weld map X58. Shipbuilding Yards and Construction: Plan showing weld types and procedures for each joint.
Weld preparation X45. Marine Paints, Coatings and Antifouling: Grinding of weld profile and removal of spatter to enable adequate coating coverage.
Weld procedure specification X58. Shipbuilding Yards and Construction: Qualified document defining parameters for each weld type.
Weld qualification record X58. Shipbuilding Yards and Construction: Documentary record qualifying welders for specific procedures.
Weld, butt X58. Shipbuilding Yards and Construction: Weld joining plates end to end.
Weld, fillet X58. Shipbuilding Yards and Construction: Triangular weld at the junction of two surfaces.
Weld, full penetration X58. Shipbuilding Yards and Construction: Weld penetrating completely through the joint thickness.
Weldability test (CTOD) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Crack tip opening displacement test.
Weldable shop primer X165. Marine Coatings, Antifouling, and Hull Husbandry: A pre-construction primer thin enough to allow welding without porosity or fume hazards.
Welded Hull Anode X100. Marine Cathodic Protection and Anodes: A sacrificial anode permanently welded to the hull plating, typically through its steel core.
Welded Lashing Point X9. Cargo Securing, Lashing and Stability Vocabulary: Permanently attached lashing fitting.
Welded Repair X83. ISO Container Manufacturing and Leasing: Container repair involving welding-in of replacement panels or members.
Welded Sea Fastening X104. Project Cargo Forwarders and Heavy Transport: Sea fastening built from welded steel rather than chains and turnbuckles alone.
Welded Steel Drum X75. IMDG Code, Classes, Packing and Segregation: Drum constructed by welding rather than seaming, with codes 1A1 or 1A2.
Welded T-bar stiffener B1. Naval Architecture: Common longitudinal hull stiffener.
Welded Tank X75. IMDG Code, Classes, Packing and Segregation: Tank constructed by welding plates, with weld procedure approvals under IMDG 6.7.
Welder, qualified X58. Shipbuilding Yards and Construction: Welder certified to a specific procedure and position.
Welding consumables (E7018) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: SMAW low-hydrogen electrode.
Welding Habitat X141. Marine Salvage Industry and Wreck Removal Contractors: Hyperbaric or atmospheric enclosure permitting underwater dry welding.
Welding Procedure Qualification X142. Classification Societies and Class Notations: WPQ approved under IACS UR W series.
Welding Procedure Review X5. Marine Surveying and Inspection: Verification of WPS and welder qualifications for class repairs.
Welding Procedure Specification X54. Naval Architecture Software and IACS Rules: Documentation governed by IACS UR W28 and W29 for hull welding.
Welding Procedure Specification (WPS) B4. Shipbuilding, Materials, Sea Trials, Retrofits and Recycling: Approved welding procedure.
Welding rod X58. Shipbuilding Yards and Construction: Consumable filler metal used in stick welding.
Welding sequence X58. Shipbuilding Yards and Construction: Order of weld passes designed to control distortion.
Welding shop X58. Shipbuilding Yards and Construction: Workshop area for fabrication and joining of subassemblies and blocks.
Welding Survey X43. Marine Surveying and Warranty Surveying: An inspection of welding procedures, qualifications, and completed welds, often supported by NDT during repair or newbuilding work.
Welding, automatic X58. Shipbuilding Yards and Construction: Welding using mechanized carriages or robots.
Welfare and Social Security (MLC Title 4) X102. Seafarer Welfare and Maritime Charities: MLC 2006 title covering medical care, shipowner liability, welfare facilities ashore, and social security.
Welfare Board X21. STCW Certificates, Crewing and Seafarer Welfare: National coordinating body under MLC Title 4.
Welfare Facilities Onshore (MLC 4.4) X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Standard encouraging governments to ensure adequate shore-based welfare facilities at ports.
Welfare facility X21. STCW Certificates, Crewing and Seafarer Welfare: Shore based seafarer center under MLC Regulation 4.4.
Welfare Stores X120. Marine Catering, Provisions and Ship Chandlers: MLC Title 3 covered category for crew recreation supplies, separate from provisions.
Welfare Visit X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Standard outreach by chaplains, ITF inspectors, or ISWAN partners to ships in port.
Welfare Visit Coordination X86. Port Agency, Husbandry and Disbursement: Coordination of welfare visits by chaplains and welfare societies.
Welfare Visitor F3. Seafaring Life, Education, Professions and Institutions: Mission to Seafarers and Stella Maris ship visitor.
Well Boat X87. Fishing Vessels and Fisheries Management: Aquaculture service vessel with refrigerated and oxygenated wells used to transport live salmon and other farmed fish.
Well car X6. Container, Intermodal and Trade Codes: North American articulated rail wagon with a well for double-stacked containers.
Well deck X11. Naval Vessels, Warship Systems and Naval Architecture: Internal docking well for landing craft.
Well Intervention Vessel X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Monohull or semisubmersible vessel used for through-tubing well intervention work in deepwater fields.
Well Plug and Abandonment X60. Marine Salvage and Wreck Removal: Permanent well closure operations preceding offshore platform removal.
Well-Boat (Aquaculture) E4. Cruise, offshore energy and auxiliary/specialised fleets: Live-fish carrier with circulation systems.
Well-stimulation vessel B5. Ship Types and Individual Vessels: Offshore vessel for well stimulation.
Well-to-Tank X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation: Upstream lifecycle emissions accounting boundary, addressed separately from tank-to-wake for hydrogen and ammonia under MEPC.376(80).
Well-to-Tank (WtT) D6. Decarbonization, emissions and alternative fuels: Emissions associated with fuel production and delivery to the ship.
Well-to-wake X69. EGCS Scrubbers, SCR and Marine Air Emissions: Lifecycle accounting boundary used in FuelEU Maritime greenhouse gas intensity.
Well-to-Wake (WtW) A3. Marine environmental legislation: MARPOL and its annexes: GHG accounting basis for GFI under MARPOL Annex VI Chapter 5.
Welland Canal X33. Inland Navigation and Barge Operations: Canadian canal of eight locks lifting vessels 99 m between Lake Ontario and Lake Erie.
Wellboat X131. Commercial Fisheries, Trawler Fleets and Seafood Processors: Live fish carrier with circulating seawater used to transport salmon smolts.
Wellhead X14. Offshore Oil and Gas Marine Operations: Pressure-containing equipment at top of wellbore.
Wellhead Platform Approach Procedure X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: The vessel procedure verified during OVID inspections for offshore vessels approaching platforms.
Wellness at Sea X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Sailors' Society's flagship mental-health and well-being programme for seafarers.
Wellness at Sea (Mission to Seafarers) X102. Seafarer Welfare and Maritime Charities: Wellbeing program of The Mission to Seafarers complementing port chaplaincy with onboard tools.
Wellness at Sea (Sailors' Society) X102. Seafarer Welfare and Maritime Charities: Sailors' Society program covering five aspects of seafarer wellbeing: emotional, physical, intellectual, spiritual, and social.
Wello Penguin X57. Ocean Energy Beyond Wind: Finnish wave energy device developed by Wello that operated at EMEC before company difficulties.
Wellpoint X13. Marine Salvage and Wreck Removal: Vacuum dewatering technique used for grounded ships on permeable seabeds.
Wells Fargo X29. Ship Sale and Purchase, Management Contracts and Valuation: US bank used as escrow agent in S&P transactions.
Wells Fargo Equipment Finance X49. Ship Finance, Leasing and Maritime Capital Markets: US lender active in inland marine and Jones Act tonnage finance.
Welsh Maritime Heritage Centre F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Cardiff Bay collections.
Welsh Maritime Industries F3. Seafaring Life, Education, Professions and Institutions: National industry body.
WeMar X57. Ocean Energy Beyond Wind: Generic placeholder for European marine renewable academic networks.
Wenatchee X85. Ferries, Ro-Pax Operators and Routes: Washington State Ferries Jumbo Mark II class ro-pax built 1998.
Wenchang X124. Dredging Industry and Reclamation Contractors: CCCC TSHD.
Wenchong Shipyard X58. Shipbuilding Yards and Construction: Huangpu Wenchong, CSSC subsidiary at Guangzhou building ferries and offshore vessels.
Wenco X94. Port Machinery and Quay Equipment Makers: Bulk material handling equipment maker supplying shiploaders and conveyors.
WEND X73. Marine Hydrography, Charting and ENC: Worldwide Electronic Navigational Chart Database, the IHO global ENC coverage and distribution framework, now WENDWG.
WEND-100 X129. Hydrographic Offices, Survey Vessels and Marine Cartography: IHO Worldwide ENC Database principles refreshed under the S-100 era to maintain coordination of ENC production and avoid coverage overlaps.
WENDWG X73. Marine Hydrography, Charting and ENC: The IHO WEND Working Group coordinating global ENC coverage.
Wesel-Datteln Canal X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The 60 km German canal between the Rhine at Wesel and the Dortmund-Ems Canal at Datteln, of CEMT Class Vb.
Weser X33. Inland Navigation and Barge Operations: German river navigable from Hann. Munden to Bremerhaven via canalized sections.
Weser Pilots X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Weserlotsen handling pilotage on the Weser between the Bremen anchorage and Bremerhaven, Brake, and Nordenham.
West Africa Cable System (WACS) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: 14,500 km submarine cable along the west coast of Africa from South Africa to the UK, in service since 2012.
West Africa Maritime Security Trust Fund X22. Piracy, Maritime Security and Armed Protection: IMO administered fund supporting Yaounde Code of Conduct implementation.
West African bunker market X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Comprises Lome, Lagos, Cotonou, Tema, and Abidjan, with Monjasa and Sahara Energy as principal STS suppliers.
West African Sardinella Fishery X87. Fishing Vessels and Fisheries Management: Purse seine fishery off Mauritania, Senegal, and Gambia targeting Sardinella aurita and Sardinella maderensis.
West and Central African MOU X98. Ship Registries and Flag States: Abuja MOU on Port State Control for the West and Central African region, signed 1999.
West Aquarius X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill GVA 7500 harsh-environment semisubmersible.
West Bollsta X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Bollsta Dolphin harsh-environment semisubmersible originally built for Fred Olsen Energy.
West Capricorn X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill sixth-generation semisubmersible.
West Carina X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Drillship formerly operated by Schahin and later transferred to other operators.
West Coast Marine Spatial Plan (Scotland) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Regional MSP for the Argyll and Clyde area defining cable and pipeline corridors.
West Eclipse X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill GVA 7500 sixth-generation semisubmersible.
West Eminence X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Samsung-built drillship operated for Petrobras under long-term contract.
West Hercules X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill GVA 7500 harsh-environment semisubmersible.
West India Trade F1. Maritime History: Sugar, rum, and molasses commerce of the Caribbean.
West Japan Works X92. Marine Steel Suppliers and Shipbuilding Plate: JFE Steel operating region covering Kurashiki and Fukuyama sites.
West Jupiter X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill sixth-generation drillship.
West Mira X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Northern Drilling sixth-generation harsh-environment semisubmersible operating in Norway.
West of Duddon Sands X123. Offshore Wind Installation Vessels and Operators: 389 MW UK wind farm commissioned 2014, Orsted and ScottishPower joint venture, 108 Siemens SWT-3.6-120 turbines.
West of England X53. Marine Insurance, P&I and Hull Clauses: The West of England Ship Owners Mutual Insurance Association (Luxembourg), an International Group P&I club founded in 1870.
West of England P&I X4. Marine Insurance, P&I and Claims: International Group P&I club founded 1870.
West of Orkney X42. Offshore Wind Installation and Cable Lay: UK offshore wind project area in ScotWind leasing round developed by Corio Generation, TotalEnergies, and Renewable Infrastructure Development Group.
West Phoenix X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill GVA 7500 harsh-environment semisubmersible.
West Tankers (Case C-185/07) X51. Maritime Arbitration, Law and BIMCO Clauses: The Court of Justice ruling holding anti-suit injunctions incompatible with Regulation 44/2001, addressed by Brussels I Recast Recital 12.
West Tellus X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Seadrill sixth-generation drillship.
Westamarin X132. High-Speed Craft, Hydrofoils and Ferry Operators: Norwegian builder of monohull HSCs including the W90 used by SNAV.
Westerdam X64. Cruise Industry Operators, Brands and Ships: Holland America Line Vista-class ship delivered in 2004.
Westerlies D1. Physical and chemical oceanography and marine meteorology: Predominant mid-latitude winds from the west.
Westermost Rough X123. Offshore Wind Installation Vessels and Operators: 210 MW UK wind farm commissioned 2015, Orsted operated, first commercial deployment of Siemens SWT-6.0-154 turbine.
Western African PSC Programme X146. Port State Control Regimes, MoUs, and Inspection Systems: Capacity-building under the Abuja MoU supported by IMO technical cooperation.
Western Australia Maritime Training Centre F3. Seafaring Life, Education, Professions and Institutions: Fremantle facility.
Western Australian Maritime Training Centre Fremantle X121. Maritime Education, Academies and Universities: Challenger Institute of Technology maritime campus.
Western Boundary Current D1. Physical and chemical oceanography and marine meteorology: Narrow, swift poleward current on the western side of subtropical gyres.
Western Dredging Association Conference X119. Maritime Conferences, Trade Shows and Awards: Annual North American dredging event since 1968.
Western European MCM Group X77. Naval Mine Warfare and Mine Countermeasures: A historical NATO grouping of European MCM forces.
Western European Waters PSSA X18. Ballast Water, Biofouling and Antifouling: PSSA designated by IMO in 2004 covering English Channel approaches and Atlantic waters.
Western Isles X85. Ferries, Ro-Pax Operators and Routes: Outer Hebrides Scottish archipelago served by CalMac from Ullapool, Uig, and Oban.
Western Pacific Naval Symposium (WPNS) E2. Naval, defence and maritime law enforcement: Regional navy chiefs forum.
Western Rivers X33. Inland Navigation and Barge Operations: US navigable waters of the Mississippi, Missouri, Ohio, Tennessee, and Cumberland systems with distinct rules.
Western Rivers Conference X103. US Inland Waterway Towing and Barge: An industry forum for US inland river operators.
Western Rivers Pilot X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: A US federal endorsement under 46 CFR Part 10 for piloting on the Western Rivers (Mississippi and its tributaries) under USCG-issued pilotage rules.
Western Rivers Rules X33. Inland Navigation and Barge Operations: Subset of US Inland Rules applicable to Western Rivers with specific whistle and lighting requirements.
Western Space and Marine X65. ROVs, AUVs, USVs and Marine Robotics: US manufacturer of subsea hydraulic manipulators historically supplied to deep submergence vehicles.
Westerschelde X124. Dredging Industry and Reclamation Contractors: Belgian-Dutch estuary dredged for Antwerp.
Westerschelde Loodsdienst X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Belgian-Dutch joint pilotage service for the Western Scheldt covering the run between Vlissingen and Antwerp.
Westfalia GEA X47. Marine Fuel Quality and ISO 8217: See GEA Westfalia.
Westinghouse X91. Submarines and Submarine Cable Systems: US naval nuclear supplier historically responsible for several submarine reactor types in cooperation with Naval Reactors.
WestLondon X108. Marine Insurance and P&I Clubs: The combined International Group entity proposed in 2024 from the merger of West of England and London P&I.
Westminster Dredging X124. Dredging Industry and Reclamation Contractors: UK subsidiary of Boskalis.
Westoe Marine X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: A heritage British inland-water builder, mentioned only for completeness.
Westphalian Maritime Order F1. Maritime History: Seventeenth century basis for the modern state-flag system.
Westport Yachts X35. Yacht and Superyacht Industry: US production superyacht builder in Hoquiam, Washington.
Wet abrasive blasting X45. Marine Paints, Coatings and Antifouling: Surface preparation using water and abrasive to reduce dust and embedded particles.
Wet Basin X113. Drydock and Ship Repair Yards: Tidal or impounded dock used to hold ships afloat alongside fitting-out berths between drydocking periods.
Wet Bell X82. Saturation Diving and Offshore Diving Operations: Open bell used as a stage for surface-supplied divers.
Wet broker X71. Shipbrokers and Brokerage Firms: Tanker chartering broker.
Wet Cargo Damage X1. Cargo Science, Commodities and Cargo Care: Claim category covering ingress, sweat, condensation losses.
Wet Cutting X28. Ship Recycling and End-of-Life: Use of water spray during cutting to suppress dust and reduce fire risk.
Wet Damage Survey X43. Marine Surveying and Warranty Surveying: An attendance recording water ingress damage to cargo, supporting outturn claims and root cause analysis.
Wet End X91. Submarines and Submarine Cable Systems: Submerged portion of a submarine cable system, including cable, repeaters, and branching units.
Wet exhaust X19. Engine Room Watchkeeping and UMS Operations: Exhaust system with sea water injection used on small craft.
Wet FFA X44. Shipping Indices, FFAs and Freight Markets: Forward Freight Agreement on a tanker route settled against BDTI or BCTI route assessments.
Wet film thickness X45. Marine Paints, Coatings and Antifouling: Thickness of a freshly applied coat measured with a comb gauge before solvent evaporation.
Wet Friction X9. Cargo Securing, Lashing and Stability Vocabulary: Friction coefficient reduced by water; CSS Annex 13 lists steel-steel wet at 0.3.
Wet Friction Test X31. Helicopter Operations on Ships: Helideck friction measurement in wet conditions, minimum 0.65 per CAP 437.
Wet Hatch Survey X5. Marine Surveying and Inspection: Investigation of water ingress through hatch covers.
Wet Lay-Up X63. Marine Auxiliary Machinery and Pumps: Boiler preservation method maintaining water-filled boiler with treated water under nitrogen blanket.
Wet Lease Container X83. ISO Container Manufacturing and Leasing: Container leased together with a refrigeration unit and certain services.
Wet Plant X91. Submarines and Submarine Cable Systems: Submerged equipment of a submarine cable system, contrasted with the dry plant ashore.
Wet Pot X82. Saturation Diving and Offshore Diving Operations: Hyperbaric water-filled training chamber for diver simulation.
Wet rock cutter X124. Dredging Industry and Reclamation Contractors: Heavy-duty cutter head for limestone and weathered granite.
Wet Scrubber X69. EGCS Scrubbers, SCR and Marine Air Emissions: EGCS using liquid contact to remove SOx from the exhaust.
Wet Storage X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Practice of storing partially installed submarine cables on the seabed between campaigns, anchored and marked.
Wet Tanker X161. Shipbroking, Freight Derivatives, and Baltic Indices: Generic term covering crude and clean petroleum tankers as opposed to dry bulk carriers.
Wet Test X155. Marine Surveying Practice and Cargo Inspection: The general term for a hose test or comparable water-based weathertightness check, in contrast to a dry test such as ultrasonic or chalk.
Wet Test (Hose Test) X5. Marine Surveying and Inspection: Hatch cover and weatherdeck hose testing.
Wet Tow X14. Offshore Oil and Gas Marine Operations: Towing a floating structure by wet draft.
Wet Worldscale Assessment X44. Shipping Indices, FFAs and Freight Markets: Tanker route price published by the Baltic Exchange in Worldscale points referencing the prevailing flat rate.
Wet-Mate Connector X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Underwater electrical connector that can be mated and demated subsea by ROV, used in cable and umbilical termination.
Wet-on-wet application X45. Marine Paints, Coatings and Antifouling: Application of successive coats within the minimum overcoat interval.
Wetheralls Yacht Brokers X125. Superyacht Industry, Builders and Brokers: UK based brokerage.
Wetland D3. Marine environmental science, pollution and conservation: Land area saturated with water seasonally or permanently, including coastal wetlands.
Wettability X47. Marine Fuel Quality and ISO 8217: Surface property influencing water dispersion in fuel and effectiveness of demulsifiers.
Wetted Explosives X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: Class 1 substances such as UN 0072 cyclonite wetted with not less than 15 per cent water by mass, reclassified to Class 4.1 only when properly wetted.
Wetted surface area (S) B1. Naval Architecture: Submerged hull area used in CF*0.5*rho*V^2*S.
Wetting Agent X75. IMDG Code, Classes, Packing and Segregation: Diluent used to desensitize explosives, with water and ethanol common choices.
WFN Strategies X122. Submarine Cable Laying, Repair Vessels and Operators: US submarine cable consulting firm performing project management and supplier qualification for many recent private systems.
WFP Escort X127. Maritime Security, Anti-Piracy and PMSCs: World Food Programme charter escort scheme conducted by EU NAVFOR Operation Atalanta from 2008.
WFS X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: World Fuel Services Corporation, US-headquartered global bunker reseller rebranded to World Kinect in 2023.
WFS (World Fuel Services) X149. Marine Fuels, Bunkering, and Alternative Fuels: A major global marine fuel reseller and physical supplier, now operating as World Kinect Energy Services.
WGNSSK (ICES) X87. Fishing Vessels and Fisheries Management: Working Group for the Assessment of Demersal Stocks in the North Sea and Skagerrak.
WGS-84 B3. Nautical Science: World Geodetic System 1984, GNSS datum.
WGS-84 (World Geodetic System 1984) X16. Nautical Science, Navigation and COLREGs: Reference datum for GPS and most modern charts.
WGS84 X129. Hydrographic Offices, Survey Vessels and Marine Cartography: World Geodetic System 1984, the reference frame for marine GNSS positioning and the geodetic basis of nearly all modern ENCs.
WGWIDE (ICES) X87. Fishing Vessels and Fisheries Management: Working Group on Widely Distributed Stocks, assessing mackerel, blue whiting, and Atlanto Scandian herring.
WHA Yachts X125. Superyacht Industry, Builders and Brokers: Smaller German shipyard.
Wha'Tum'Pum Ocean Crossings F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Polynesian heritage voyaging.
Whale fall X10. Marine Biology, Fisheries and Oceanography: Carcass of a large cetacean on the seabed, supporting a successional deep-sea community.
Whale Hunt Folk Heritage F2. Maritime Culture, Heritage, Archaeology, Art and Museums: New Bedford and Lamalera traditions.
Whale shark X10. Marine Biology, Fisheries and Oceanography: *Rhincodon typus*, the largest extant fish, a planktivore.
Whale strike avoidance X27. Polar Code, Ice Navigation and Polar Operations: Recommended bridge practice in polar areas with marine mammal concentrations.
Whaleback X39. Pre-1900 Maritime History: A late nineteenth-century American Great Lakes bulk carrier with a rounded upper hull, designed by Alexander McDougall.
Whaler X22. Piracy, Maritime Security and Armed Protection: Larger pirate craft used as a mothership in the early Somali era.
Whaling X10. Marine Biology, Fisheries and Oceanography: Hunting of whales; commercial whaling moratorium adopted by IWC in 1982 (effective 1986).