Glossary

Maritime glossary, terms beginning with W

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

Showing 250 of 1357 terms (page 1 of 6).

W.B. Yeats X85. Ferries, Ro-Pax Operators and Routes: Irish Ferries cruise-ferry built 2018 deployed on Dublin to Cherbourg and Dublin to Holyhead.
W/M (Weight or Measure) X1. Cargo Science, Commodities and Cargo Care: Freight basis using greater of weight or volume.
W&K Container Industries X83. ISO Container Manufacturing and Leasing: Chinese specialty container manufacturer.
W14 X90. Marine Engine Specific Model Enumeration: Wartsila small four-stroke marine engine introduced as a compact high-efficiency platform.
W16V32 X90. Marine Engine Specific Model Enumeration: Wartsila Vasa 32 series sixteen-cylinder V configuration medium-speed engine with 320 millimeter bore.
W20 X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed marine engine with 200 millimeter bore offered for auxiliary and propulsion duty.
W26 X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed marine engine with 260 millimeter bore.
W2W X59. Offshore Wind O&M, CTVs and SOVs: Walk to work, the practice of using a motion compensated gangway to transfer technicians and cargo between an SOV and a turbine.
W31 X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed marine engine with 310 millimeter bore recognized by Guinness World Records as the most efficient four-stroke diesel at 50.0 percent brake thermal efficiency.
W32 X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed marine engine with 320 millimeter bore widely used as a main and auxiliary engine.
W34DF X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed dual-fuel marine engine with 340 millimeter bore for methane operation.
W38 X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed marine engine with 380 millimeter bore.
W46DF X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed dual-fuel marine engine with 460 millimeter bore for methane operation.
W46F X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed marine engine with 460 millimeter bore in the heavy fuel oil configuration.
W50DF X90. Marine Engine Specific Model Enumeration: Wartsila four-stroke medium-speed dual-fuel marine engine with 500 millimeter bore widely used on LNG carriers and cruise ships.
Wa 1 X88. Marine Surface Preparation and Coatings Application: ISO 8501-4 preparation grade for light water jetting removing loose matter.
Wa 2 X88. Marine Surface Preparation and Coatings Application: ISO 8501-4 preparation grade for thorough water jetting where most foreign matter is removed.
Wa 2.5 X88. Marine Surface Preparation and Coatings Application: ISO 8501-4 preparation grade for very thorough water jetting where staining is limited to randomly dispersed light discoloration.
Wa 3 X88. Marine Surface Preparation and Coatings Application: ISO 8501-4 preparation grade for water jetting to visually clean steel with no visible residues.
Waal X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The principal Dutch distributary of the Rhine, the busiest inland waterway in Europe in tonnage, running 84 km from the Pannerdens Canal to the Hollands Diep.
WAAS X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: Wide Area Augmentation System, the US SBAS service.
Wabag X63. Marine Auxiliary Machinery and Pumps: Swiss manufacturer of water and wastewater treatment systems including marine STPs.
WACS X122. Submarine Cable Laying, Repair Vessels and Operators: West Africa Cable System, 14,500 km in service 2012 by ASN, with landings from Yzerfontein (South Africa) to Highbridge (UK).
Wadam X54. Naval Architecture Software and IACS Rules: DNV Sesam frequency-domain panel method seakeeping solver.
Wadden Sea X57. Ocean Energy Beyond Wind: Protected coastal area off the Netherlands, Germany, and Denmark that influences siting of offshore renewable, hydrogen, and CCS infrastructure.
Wadden Sea PSSA X18. Ballast Water, Biofouling and Antifouling: PSSA designated by IMO in 2002 covering Dutch, German, and Danish Wadden Sea waters.
Waesche, USCGC (WMSL-751) X130. National Coast Guards and Cutter Fleets: Second Legend-class National Security Cutter, commissioned 2010, homeported Alameda, California.
WAF Web Application Firewall X25. Maritime Cybersecurity, OT and IT: Filter analyzing HTTP and HTTPS traffic for application layer attacks.
WAGB X130. National Coast Guards and Cutter Fleets: USCG hull classification for icebreakers, including Polar Star (WAGB-10) and Healy (WAGB-20).
Wage Account Statement X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Monthly seafarer wage statement required under MLC 2.2.
Wagenborg X42. Offshore Wind Installation and Cable Lay: Dutch shipping company supporting offshore wind logistics in the southern North Sea.
Wageningen B-series B1. Naval Architecture: Open-water propeller series from MARIN.
Wageningen C-series X38. Propellers, Stern Gear and Shaft Lines: Controllable pitch propeller series tested at MARIN.
Wageningen Ka-Kd series X38. Propellers, Stern Gear and Shaft Lines: Ducted propeller series for nozzle 19A and related ducts, derived at MARIN.
Wages account C2. Ship operations, crewing and technical management: Crew wages ledger maintained by the manager.
Wages, Allotments, and Remittances (MLC 2.2) X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Standard regulating wage payment, allotments to families, and currency.
Wages, victuals, and stores C1. Commercial shipping, chartering, economics and finance: Crew related operating cost items.
Wagner X88. Marine Surface Preparation and Coatings Application: German and US manufacturer of airless spray equipment.
Wagon X6. Container, Intermodal and Trade Codes: Rail vehicle carrying containers; in North America, "well car" or "flat car".
Wagon Mound (No 1), The [1961] AC 388 X143. Landmark Maritime Law Cases and Doctrines: Privy Council overruled Polemis, holding that liability in tort depends on reasonable foreseeability of damage.
Wagon Mound (No 2), The [1967] 1 AC 617 X143. Landmark Maritime Law Cases and Doctrines: Privy Council clarified that even small foreseeable risks may ground liability in nuisance.
Waigaoqiao Shipbuilding X58. Shipbuilding Yards and Construction: SWS, CSSC subsidiary at Shanghai, builder of VLCCs and bulkers.
WAIS X133. Polar Research Vessels and Polar Code Regimes: West Antarctic Ice Sheet, focus of IceBridge and IceSat-2 polar science cruises supported by Nathaniel B. Palmer.
Waiting Time Report X86. Port Agency, Husbandry and Disbursement: Report on time spent waiting for berth, included in Statement of Facts.
Waiver Fee X49. Ship Finance, Leasing and Maritime Capital Markets: Fee paid to lenders for consent to a deviation from facility terms.
Waiver of jurisdictional objection X152. Maritime Arbitration and Dispute Resolution: Loss of right to object to jurisdiction by participating in the arbitration without preserving the objection under section 73 English Arbitration Act 1996.
Waiver, HFO X52. Polar Code, Arctic and Antarctic Shipping: Time-limited waiver available under MARPOL Annex I regulation 43A.5.2 for ships meeting specified construction standards to continue using or carrying HFO until 1 July 2029.
Wajac X54. Naval Architecture Software and IACS Rules: DNV Sesam wave load on jacket structures module.
Wakaba X140. Ammonia as Marine Fuel and Hydrogen Shipping: Mitsui OSK Lines ammonia-ready VLGC delivered at Namura Imari 2025.
Wakashio X13. Marine Salvage and Wreck Removal: 2020 Japanese owned bulker grounded on Mauritius reef, broken in two for removal.
Wakashio (2020) X12. Maritime Casualties and Investigation: Japanese-owned bulk carrier grounded on Pointe d'Esny reef, Mauritius, on 25 July 2020, spilling about 1,000 tonnes of VLSFO; investigated by Panama as flag state and the Mauritian Court of…
Wakashio grounding (2020) X163. Marine Accident Investigation Agencies and Landmark Inquiries: Panama-flag capesize bulk carrier that grounded off Pointe d'Esny, Mauritius on 25 July 2020 and subsequently spilled about 1,000 tonnes of very low sulphur fuel oil, investigated by the Panama…
Wakashio, MV X167. Major Salvage Companies, Wreck Removals, and Equipment: Japanese owned Panama flag bulk carrier that grounded at Pointe d'Esny, Mauritius on 25 July 2020 and broke on 6 August 2020, with salvage by Smit.
Wake F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Disturbed water astern of a moving vessel.
Wake Equalizing Duct X112. IMO GHG Strategy, CII, EEXI and EU Maritime Regulation: Annular duct fitted ahead of the propeller to equalize wake and improve propulsive efficiency.
Wake Field X54. Naval Architecture Software and IACS Rules: Velocity field at the propeller plane used in cavitation and propulsion analyses.
Wake fraction (w) B1. Naval Architecture: (V - VA)/V at propeller plane.
Wake loss X42. Offshore Wind Installation and Cable Lay: Reduction in downstream turbine output due to upstream rotor wakes considered in wind farm layout.
Wake peak X38. Propellers, Stern Gear and Shaft Lines: Region of low axial velocity behind a single-screw stern, typically at the 12 o'clock position.
Wake-equalizing duct (WED) X38. Propellers, Stern Gear and Shaft Lines: Schneekluth duct (twin half-rings) fitted forward of the propeller to equalize the inflow.
Wake-Homing Torpedo X91. Submarines and Submarine Cable Systems: Torpedo guidance approach that homes on a target ship's wake; not typical of US heavyweight torpedoes.
Walk to work vessel X59. Offshore Wind O&M, CTVs and SOVs: SOV or CSOV equipped with a motion compensated gangway enabling personnel and cargo transfer to turbines.
Walk-to-work X42. Offshore Wind Installation and Cable Lay: Motion compensated gangway system on SOVs enabling crew transfer in higher sea states.
Walk-to-Work (W2W) X14. Offshore Oil and Gas Marine Operations: Personnel transfer via motion-compensated gangway between vessel and platform.
Walk-to-Work Gangway E4. Cruise, offshore energy and auxiliary/specialised fleets: Motion-compensated gangway on SOV.
Walker Circulation D1. Physical and chemical oceanography and marine meteorology: Zonal atmospheric overturning over the tropical Pacific linked to ENSO.
Walking back X3. Ship Handling, Seamanship and Deck Vocabulary: Easing a rope or cable under power.
Walking out the cable X3. Ship Handling, Seamanship and Deck Vocabulary: Using the windlass to lower the anchor under power rather than letting it run free.
Walking ratio X15. Ports, Terminals and Stevedoring: yard tractor moves per crane move.
Walkway block X58. Shipbuilding Yards and Construction: Outfitting block including engine room grating and walkway structures.
Wall knot X3. Ship Handling, Seamanship and Deck Vocabulary: Stopper knot worked into the strands of a rope end.
Wall Lashing X9. Cargo Securing, Lashing and Stability Vocabulary: Lashing to ship's side or bulkhead.
Wall Stiffener X83. ISO Container Manufacturing and Leasing: Vertical or horizontal pressing reinforcing container side or end walls.
Wall Wash Test X5. Marine Surveying and Inspection: Methanol or solvent test for cleanliness in chemical tanker tanks.
Walled Garden X48. Maritime Cybersecurity: Restricted set of permitted destinations enforced for some shipboard internet access.
Wallem Bunker Service X115. Marine Bunker and Cargo Surveying: Bunker brokerage and survey support service operated within the Wallem ship management group.
Wallem Group X102. Seafarer Welfare and Maritime Charities: Hong Kong-based ship manager and crewing house founded 1903 by Norwegian captain Haakon Wallem.
Wallem Maritime Training X160. Maritime Academies, Universities, and STCW Certification: Wallem Group operated training centers in India, Philippines, and China for Wallem managed fleet cadet sponsorship and officer upgrade courses.
Wallem Material Declarations X50. Ship Recycling, Demolition and Hong Kong Convention: Ship management company contributions to IHM Part I compilation under owner instruction.
Wallenius Marine X111. Methanol, Ammonia and Alternative Marine Fuels: Swedish ro-ro and car carrier operator and partner in the Oceanbird wind-assisted methanol concept.
Wallenius Wilhelmsen X109. Maritime Autonomous Surface Ships and MASS Code: A roll on roll off shipping company developing the Orcelle Wind unmanned wind powered concept.
Wallsend Engineering X113. Drydock and Ship Repair Yards: A&P Tyne engineering and repair operation at Wallsend on the River Tyne, England.
Wally X125. Superyacht Industry, Builders and Brokers: Monaco based builder founded by Luca Bassani Antivari in 1994, acquired by Ferretti Group in 2019, producing wallypower, wallytender, and the carbon WallyCento sailing yacht line.
Wally Yachts F4. Recreational Boating, Yachting and Sport: Monegasque high-performance yacht builder.
Wallytender X125. Superyacht Industry, Builders and Brokers: Series of high performance day boats from the Wally brand.
Walney X123. Offshore Wind Installation Vessels and Operators: 367 MW UK wind farm commissioned 2012, Orsted operated, Siemens SWT-3.6-107 turbines.
Walney Extension X42. Offshore Wind Installation and Cable Lay: UK offshore wind farm in the Irish Sea operated by Orsted.
Walrus X10. Marine Biology, Fisheries and Oceanography: *Odobenus rosmarus*, large Arctic pinniped with prominent tusks.
Walrus class X11. Naval Vessels, Warship Systems and Naval Architecture: Royal Netherlands Navy diesel-electric submarine.
Walter Hammond Cable Vessel X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Reference vessel in regional cable maintenance fleets.
Walvis Bay X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Namibian bunker port at Anchorage A supplied by NAMCOR and Vivo Energy.
Walvis Bay Container Terminal X138. Global Container Terminal Operators and Port Equipment: Namibian Atlantic facility expanded 2019 by China Harbour Engineering, operated by Namibian Ports Authority.
WAMIT X54. Naval Architecture Software and IACS Rules: Wave Analysis at MIT, boundary element diffraction code widely used in offshore hydrodynamics.
WaMoS II X96. Hull Integrity Monitoring and Strain Gauges: OceanWaveS marine X-band wave radar system measuring directional wave spectra.
WaMoS III X96. Hull Integrity Monitoring and Strain Gauges: OceanWaveS successor wave radar system providing enhanced wave measurement capability.
WAN X107. Maritime Cybersecurity and OT Security: Wide Area Network, a network spanning multiple sites or geographies.
Wan Hai Lines X98. Ship Registries and Flag States: Taiwanese container line with vessels under Taiwan, Liberia, and Singapore flags.
WAN Optimization X48. Maritime Cybersecurity: Techniques to improve performance of wide area links, often deployed on satcom paths.
Wandering Albatross X97. Polar Expedition Cruise and IAATO Operations: Large albatross (Diomedea exulans) frequently sighted on Drake Passage and South Georgia voyages.
Wando Welch Terminal X138. Global Container Terminal Operators and Port Equipment: South Carolina Ports Authority's primary box terminal at Mount Pleasant.
Waneed Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Saudi Arabian bunker supplier active at Jeddah and Yanbu through Bahri marine logistics.
WannaCry X25. Maritime Cybersecurity, OT and IT: May 2017 ransomware worm exploiting EternalBlue, affected NHS, Renault and others.
WannaCry (May 2017) X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: The 12 May 2017 ransomworm exploiting EternalBlue (CVE-2017-0144) that affected multiple shipping companies and shipboard ECDIS units running unsupported Windows.
Wapen von Hamburg III X128. Sail Training Ships and Tall Ship Associations: 1992 German replica of a 17th century three masted ship, 49 m length, sail training and corporate charter in the Baltic.
Wapping X39. Pre-1900 Maritime History: Thames-side district of London long associated with seamen, shipyards, and the Execution Dock.
War Cancellation Clause X51. Maritime Arbitration, Law and BIMCO Clauses: A charterparty provision permitting cancellation on outbreak of war affecting trading.
War Cargo X108. Marine Insurance and P&I Clubs: Cargo war risk cover written under Institute War Clauses Cargo, separate from standard ICC perils.
War Driving X48. Maritime Cybersecurity: Practice of scanning for wireless networks from a moving vehicle or vessel.
War mining X77. Naval Mine Warfare and Mine Countermeasures: The wartime laying of offensive minefields in enemy waters to deny use of ports, channels, and chokepoints.
WAR Risk Insurance A5. Maritime Law, private and commercial: Cover for war and strikes perils excluded from hull policy.
War Risk Listed Area X22. Piracy, Maritime Security and Armed Protection: JWC designation triggering additional premium and notification requirements.
War Risk Trading Warranties E1. Maritime security, geopolitics and risk: Hull policy clauses listing excluded areas.
War Risk Trading Warranty X127. Maritime Security, Anti-Piracy and PMSCs: Charter-party clause restricting trading to non-listed areas absent additional premium and owner consent.
War Risks Clause X17. Chartering, Shipbroking and Freight Trading: Clause addressing route deviation, additional insurance and refusal of orders in war zones.
War Risks Cover X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: Class of insurance covering hull and machinery, freight, increased value, and crew risks against war, strikes, malicious acts, terrorism, and piracy.
War Risks Insurance X53. Marine Insurance, P&I and Hull Clauses: Cover for losses arising from war, civil war, revolution, rebellion, insurrection, capture, seizure, arrest, restraint, detainment, mines, torpedoes, and similar perils, customarily excluded from…
War Risks Mutual X117. Marine Insurance Markets, Captives and Reinsurance: Various mutuals covering hull war risks for shipowner members, including the Hellenic War Risks and the Combined Group of P and I Clubs War Risks facility.
War Risks Mutuals X4. Marine Insurance, P&I and Claims: associations such as the Hellenic War Risks and Norwegian war risk pools, providing P&I-style war cover.
War Risks P&I X145. P&I Clubs, War Risk Insurers, and Marine Insurance Markets: P&I cover for war risks where excluded from standard club entry.
Warehouse Facility X49. Ship Finance, Leasing and Maritime Capital Markets: Bridge facility used to accumulate assets pending term financing.
Warehouse keeper X15. Ports, Terminals and Stevedoring: licensed operator of bonded warehouse at the port.
Warehouse Management System (WMS) X120. Marine Catering, Provisions and Ship Chandlers: Chandler back-end system tracking lot, expiry, and reorder.
Warehouse receipt C3. Logistics, freight forwarding and multimodal trade: FIATA FWR or general warehouse receipt.
Warehouse-to-Warehouse Clause X4. Marine Insurance, P&I and Claims: predecessor to the Transit Clause, providing continuous cover from origin to destination warehouse.
Warlike Operations Area X127. Maritime Security, Anti-Piracy and PMSCs: Designation triggering crew bonus payments under most CBAs, typically aligned with JWLA listed areas.
Warlike Operations Bonus E1. Maritime security, geopolitics and risk: Crew supplementary pay for listed-area transits.
Warm core ring X10. Marine Biology, Fisheries and Oceanography: Anticyclonic mesoscale eddy detached from a western boundary current's warm side.
Warm dry humidity control X165. Marine Coatings, Antifouling, and Hull Husbandry: Practice of heating tank atmospheres above dewpoint to prevent flash rusting between blasting and priming.
Warm front X16. Nautical Science, Navigation and COLREGs: Boundary where a warm air mass advances over cooler air.
Warm sector X16. Nautical Science, Navigation and COLREGs: Region of warm air between warm and cold fronts in a depression.
Warning Label X75. IMDG Code, Classes, Packing and Segregation: Generic term for class label or subsidiary risk label.
Warning Letter X146. Port State Control Regimes, MoUs, and Inspection Systems: A Paris MoU communication to flag and owner indicating that a ship is approaching banning thresholds.
Warning Signal X60. Marine Salvage and Wreck Removal: Audible and visual signals required during salvage operations near other traffic.
Warp X3. Ship Handling, Seamanship and Deck Vocabulary: Move a vessel by hauling on lines secured to fixed points.
Warpage, welding X58. Shipbuilding Yards and Construction: Out-of-plane distortion in plates caused by welding heat.
Warping X15. Ports, Terminals and Stevedoring: moving a vessel along the quay using its own lines and capstans.
Warping Drum X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Smooth drum on the side of a winch or windlass used for warping the ship by hauling on a line wound around it.
Warping Head X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Synonym for warping drum or capstan head.
Warrant X49. Ship Finance, Leasing and Maritime Capital Markets: Right to subscribe for shares at a fixed price, used in some restructured shipping deals.
Warranties X53. Marine Insurance, P&I and Hull Clauses: Promissory undertakings by the assured, the effect of breach having been reformed by the UK Insurance Act 2015 to suspend rather than terminate cover.
Warranties (Marine Insurance) X51. Maritime Arbitration, Law and BIMCO Clauses: Promissory terms strict compliance with which is a condition of cover under the Marine Insurance Act 1906 as amended by the Insurance Act 2015.
Warranty X4. Marine Insurance, P&I and Claims: see Promissory Warranty; reformed by sections 9 to 11 of the Insurance Act 2015.
Warranty (Insurance) A5. Maritime Law, private and commercial: Term whose breach discharges the insurer from liability (Marine Insurance Act 1906, as amended by the Insurance Act 2015).
Warranty (Marine Insurance) X157. Marine Loss Adjusters, GA Practice, and Casualty Firms: Condition that must be strictly complied with; under the Insurance Act 2015 in England, breach now suspends rather than discharges cover.
Warranty of Authority X29. Ship Sale and Purchase, Management Contracts and Valuation: Broker's implicit warranty that principal is bound.
Warranty of Legality X4. Marine Insurance, P&I and Claims: implied warranty under section 41 of the Marine Insurance Act 1906 that the adventure is lawful.
Warranty of Neutrality X4. Marine Insurance, P&I and Claims: implied warranty under section 36 of the Marine Insurance Act 1906 that insured neutral property shall have neutral character at the commencement of the risk.
Warranty of seaworthiness C1. Commercial shipping, chartering, economics and finance: Express or implied undertaking by owner.
Warranty period X58. Shipbuilding Yards and Construction: Post-delivery period during which the yard remedies defects, typically twelve months.
Warranty Survey X13. Marine Salvage and Wreck Removal: MWS attendance issuing certificates for tow, lift, or transport phases.
Warranty Survey Heavy Lift X104. Project Cargo Forwarders and Heavy Transport: Insurer's survey approving a planned heavy lift or transport operation.
Warranty Surveyor X43. Marine Surveying and Warranty Surveying: See marine warranty surveyor, the independent technical authority appointed under insurance or contract.
Warranty, Marine X117. Marine Insurance Markets, Captives and Reinsurance: A condition strictly to be complied with by the insured, with breach voiding cover under MIA 1906 prior to the Insurance Act 2015 reforms.
Warrior, HMS X39. Pre-1900 Maritime History: Royal Navy iron-hulled armored frigate launched on December 29, 1860, preserved at Portsmouth.
Warsash Maritime Academy X121. Maritime Education, Academies and Universities: Warsash Maritime School at Solent University, Southampton, founded 1946 as the School of Navigation, conducts MCA-approved Officer of the Watch through Master and Chief Engineer programs, relocated…
Warsash Maritime School F3. Seafaring Life, Education, Professions and Institutions: Solent University college for officer education.
Warsaw Convention (carriage) X152. Maritime Arbitration and Dispute Resolution: Aviation convention, not maritime, but illustrative of mandatory-law constraints that can affect arbitrability in carriage contexts.
Warship E2. Naval, defence and maritime law enforcement: State vessel under command of a commissioned officer manned by armed forces crew.
Warship (DDG, FFG, LHA) B5. Ship Types and Individual Vessels: Naval combatant types.
Warship Definition (UNCLOS Art 29) E2. Naval, defence and maritime law enforcement: Treaty definition of a warship.
Wartime Trading Warranties E2. Naval, defence and maritime law enforcement: Hull policy clauses governing belligerent calls.
Wartsila X15. Ports, Terminals and Stevedoring: supplier of port-area thrusters, automation, and LNG bunkering systems.
Wartsila 20 X19. Engine Room Watchkeeping and UMS Operations: Compact medium speed engine used for auxiliary power on smaller ships.
Wartsila 25 Ammonia Engine X140. Ammonia as Marine Fuel and Hydrogen Shipping: Four-stroke medium-speed ammonia dual-fuel engine launched 2023.
Wartsila 26 X19. Engine Room Watchkeeping and UMS Operations: Medium speed engine used on offshore vessels.
Wartsila 31 B2. Marine Engineering: Medium-speed four-stroke engine family.
Wartsila 31 Ammonia Engine X111. Methanol, Ammonia and Alternative Marine Fuels: Ammonia-capable variant of the Wartsila 31 medium-speed engine under development by Wartsila.
Wartsila 31DF X19. Engine Room Watchkeeping and UMS Operations: Dual fuel variant of the Wartsila 31 platform.
Wartsila 32 X19. Engine Room Watchkeeping and UMS Operations: 320 mm bore medium speed engine widely used for propulsion and power.
Wartsila 32/34DF B2. Marine Engineering: Medium-speed dual-fuel engine families.
Wartsila 34DF X67. Marine Electrical Systems and Shore Power: 340 mm bore Wartsila dual-fuel four-stroke engine widely used on LNG carriers and gas-fueled merchant ships.
Wartsila 38 X19. Engine Room Watchkeeping and UMS Operations: 380 mm bore medium speed engine used on container ships and ferries.
Wartsila 46F B2. Marine Engineering: Four-stroke medium-speed engine.
Wartsila 50DF X19. Engine Room Watchkeeping and UMS Operations: Dual fuel medium speed engine for LNG carriers and dual fuel installations.
Wartsila 64 X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila 640 mm bore medium-speed engine for high-power main propulsion on container ships and tankers.
Wartsila 6L20 X137. Harbour Tugs, Towage Operators and Tug Builders: 6-cylinder marine medium-speed engine rated up to about 1,200 kW for tugs.
Wartsila 8L20 X137. Harbour Tugs, Towage Operators and Tug Builders: 8-cylinder Wartsila medium-speed engine reaching about 1,600 kW.
Wartsila 8L26 X137. Harbour Tugs, Towage Operators and Tug Builders: 8-cylinder W26 engine up to about 2,720 kW for larger escort tugs.
Wartsila Aalborg LNG X72. Bunkering Hubs and Bunker Suppliers: Wartsila branded LNG bunker handling systems installed on LNG bunker vessels and small scale terminals.
Wartsila Aquarius (BWMS) X38. Propellers, Stern Gear and Shaft Lines: Off-topic for shaft line; not used here.
Wartsila Aquarius EC X18. Ballast Water, Biofouling and Antifouling: Filtration plus electrochlorination BWMS by Wartsila.
Wartsila Aquarius UV X18. Ballast Water, Biofouling and Antifouling: Filtration plus medium-pressure UV BWMS by Wartsila.
Wartsila bunker package X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: LNG bunkering system supplier for both vessel and shore installations.
Wartsila changeover automation X47. Marine Fuel Quality and ISO 8217: Engine maker procedure for managed switch between residual and distillate grades in two-stroke and four-stroke engines.
Wartsila Compact X63. Marine Auxiliary Machinery and Pumps: Wartsila branded sewage treatment plant series.
Wartsila CP propeller X38. Propellers, Stern Gear and Shaft Lines: Wartsila controllable pitch propeller line, descended from Lips and KaMeWa.
Wartsila Dual Fuel Engine D6. Decarbonization, emissions and alternative fuels: Family of dual-fuel medium-speed engines.
Wartsila EGR X69. EGCS Scrubbers, SCR and Marine Air Emissions: Wartsila exhaust gas recirculation system for two-stroke engines.
Wartsila Energopac X38. Propellers, Stern Gear and Shaft Lines: Integrated propeller-rudder energy-saving package marketed by Wartsila.
Wartsila engine X61. Marine Lubricants and Cylinder Oils: Medium-speed four-stroke and two-stroke engine ranges from Wartsila, the latter now under WinGD.
Wartsila Exhaust Gas Cleaning X69. EGCS Scrubbers, SCR and Marine Air Emissions: Business unit incorporating the legacy Hamworthy Krystallon scrubber portfolio.
Wartsila Fleet Operations Solution (FOS) X78. Voyage Optimization and Vessel Performance Software: A Wartsila Voyage suite providing route planning, weather routing, fleet performance, and reporting features.
Wartsila FOS X74. AIS Data, Vessel Tracking and Maritime Intelligence: Fleet Operations Solution from Wartsila Voyage covering performance and emissions monitoring.
Wartsila Hamworthy X63. Marine Auxiliary Machinery and Pumps: Combined product line covering OWS, STP, and pump equipment.
Wartsila Hamworthy Krystallon X113. Drydock and Ship Repair Yards: Exhaust gas cleaning system retrofitted in drydock to meet the IMO 2020 sulphur cap.
Wartsila Hybrid Energy Solution X67. Marine Electrical Systems and Shore Power: Pre-engineered hybrid package integrating engines, energy storage, and PMS from Wartsila.
Wartsila Hybrid Shaft Generator X67. Marine Electrical Systems and Shore Power: Shaft generator with full converter allowing variable speed operation and PTI and PTO modes.
Wartsila Lubrication Monitoring X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila Genius online cylinder lubrication analysis service supporting feed rate optimisation.
Wartsila Modular Thruster (WST) X38. Propellers, Stern Gear and Shaft Lines: Wartsila steerable thruster series (WST-E, WST-U) for offshore and merchant vessels.
Wartsila NACOS X19. Engine Room Watchkeeping and UMS Operations: Integrated automation, navigation, and control system suite.
Wartsila NACOS Platinum X67. Marine Electrical Systems and Shore Power: Integrated bridge, automation, and power management product line from Wartsila SAM Electronics.
Wartsila NOx Reducer X69. EGCS Scrubbers, SCR and Marine Air Emissions: SCR product family from Wartsila for medium-speed and two-stroke engines.
Wartsila polar designs X27. Polar Code, Ice Navigation and Polar Operations: Finnish designer/builder of icebreakers including Polaris LNG-fuelled icebreaker.
Wartsila reduction gear X90. Marine Engine Specific Model Enumeration: Marine reduction gearbox line offered by Wartsila for use with its medium-speed engines.
Wartsila RT-flex50 X19. Engine Room Watchkeeping and UMS Operations: Electronically controlled long stroke two stroke engine in 500 mm bore.
Wartsila RT-flex58T X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila Sulzer 580 mm bore common-rail two-stroke engine for Aframax and Suezmax tankers.
Wartsila RT-flex60C X19. Engine Room Watchkeeping and UMS Operations: Electronically controlled two stroke engine common on Panamax tonnage.
Wartsila RT-flex84T X19. Engine Room Watchkeeping and UMS Operations: Large bore electronically controlled two stroke engine for tankers and bulk carriers.
Wartsila RT-flex96C X19. Engine Room Watchkeeping and UMS Operations: 960 mm bore two stroke engine used on large container ships.
Wartsila SAM Electronics X77. Naval Mine Warfare and Mine Countermeasures: A naval electronics supplier whose MOMOPS-NL mine operations system equips Royal Netherlands Navy minehunters.
Wartsila Senitec X63. Marine Auxiliary Machinery and Pumps: Wartsila sewage treatment plant series compliant with MEPC.227(64).
Wartsila Shore Power X94. Port Machinery and Quay Equipment Makers: Wartsila-branded shore connection system providing 6.6 kV or 11 kV supply to berthed vessels.
Wartsila Simplex Sterntube Seal X113. Drydock and Ship Repair Yards: Stern tube sealing system retrofitted or overhauled during drydock by Wartsila licensees.
Wartsila Smart Navigation X89. ECDIS and Bridge Equipment Makers: Wartsila Voyage initiative bringing connected services to NACOS Platinum bridges.
Wartsila SmartMove Suite X109. Maritime Autonomous Surface Ships and MASS Code: A Wartsila product family that includes automated berthing, dynamic positioning, and assisted maneuvering functions.
Wartsila Stakeholder Day X119. Maritime Conferences, Trade Shows and Awards: Annual Helsinki investor and customer event.
Wartsila Steerprop X38. Propellers, Stern Gear and Shaft Lines: Steerprop (Finland), majority-owned by Wartsila, produces contra-rotating and conventional azimuth thrusters.
Wartsila Sternguard X38. Propellers, Stern Gear and Shaft Lines: Wartsila water-lubricated stern-tube bearing system, derived from Cedervall.
Wartsila Sulzer X92 B2. Marine Engineering: Large bore two-stroke for ULCV (transferred to WinGD).
Wartsila Voyage X55. Marine Simulators, Training and Maritime Academies: Business unit of Wartsila that integrates the former Transas portfolio, including NTPRO 5000 simulators and ECDIS products.
Wartsila W31DF Methanol Retrofit X111. Methanol, Ammonia and Alternative Marine Fuels: Methanol retrofit of the Wartsila W31DF dual-fuel medium-speed engine.
Wartsila W32-Methanol X111. Methanol, Ammonia and Alternative Marine Fuels: New methanol-fueled variant of the Wartsila 32 medium-speed engine.
Wartsila W34DF Methanol Retrofit X111. Methanol, Ammonia and Alternative Marine Fuels: Methanol retrofit of the Wartsila W34DF dual-fuel medium-speed engine.
Wartsila WECS (Wartsila Engine Control System) X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: The Wartsila two-stroke engine control system, an OT asset in IACS UR E27 scope.
Wartsila WSP X67. Marine Electrical Systems and Shore Power: Wartsila steerable thruster with permanent magnet motor for offshore vessels.
Wartsila WST X67. Marine Electrical Systems and Shore Power: Wartsila steerable thruster product line for harbor and dynamic positioning service.
Wartsila WTT X137. Harbour Tugs, Towage Operators and Tug Builders: Wartsila Tug Technology naming used for some integrated propulsion offerings.
Wartsila X-DF X56. LNG/LPG Carriers and IGC Code: Two-stroke low-pressure dual-fuel engine series using the Otto cycle, fitted on many modern LNG carriers.
Wartsila X62 X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila 620 mm bore long-stroke electronic two-stroke engine for Panamax and Aframax vessels.
Wartsila X72 X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila 720 mm bore long-stroke electronic two-stroke engine for VLCC and large bulker propulsion.
Wartsila X82 X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila 820 mm bore long-stroke electronic two-stroke engine for large container ships.
Wartsila X92 X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Wartsila 920 mm bore long-stroke electronic two-stroke engine for ultra-large container ships.
Warwick Reid X114. Maritime Arbitration and Shipping Law Firms: Reference to anti-suit injunction case law in shipping arbitration.
Wasa X133. Polar Research Vessels and Polar Code Regimes: Swedish Antarctic summer-only station co-located with Aboa in Queen Maud Land.
Wash oil X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Diesel used to flush a residual system before maintenance.
Wash Tank Temperature X41. Cruise Ship Public Health and VSP/USPH: Detergent bay temperature for dishwashing, maintained per equipment manufacturer specifications.
Wash Tower X69. EGCS Scrubbers, SCR and Marine Air Emissions: Synonym for the absorber column of a wet scrubber.
Wash water (scrubber) X149. Marine Fuels, Bunkering, and Alternative Fuels: The seawater or fresh water circuit through which exhaust gas SOx is absorbed in an EGCS, regulated under MEPC.340(77) guidelines.
Washing Plan X28. Ship Recycling and End-of-Life: Yard procedure for washing dirty residues into containment before they reach the foreshore.
Washington Navy Yard X39. Pre-1900 Maritime History: United States Navy shipyard on the Anacostia River founded in 1799.
Washington State Ferries X85. Ferries, Ro-Pax Operators and Routes: Operator of the largest US ferry system by passenger volume, serving Puget Sound and the San Juan Islands.
Washington State Ferries (WSF) X166. Inland Waterways, Ferries, RoRo, and Short Sea Shipping: The state-operated ferry network of Washington, USA, the largest US ferry operator by passenger volume, serving Puget Sound and the San Juan Islands.
Washwater Discharge Criteria X69. EGCS Scrubbers, SCR and Marine Air Emissions: pH, PAH, turbidity and nitrate limits set in MEPC.340(77).
Washwater Monitoring System X69. EGCS Scrubbers, SCR and Marine Air Emissions: Instrumentation chain measuring discharge water properties.
Washwater Treatment Unit X69. EGCS Scrubbers, SCR and Marine Air Emissions: Skid removing solids and dissolved contaminants from scrubber bleed-off.
Wasim X54. Naval Architecture Software and IACS Rules: DNV Sesam time-domain seakeeping and slamming solver.
Wasp class X11. Naval Vessels, Warship Systems and Naval Architecture: USN LHD-1 amphibious assault ship.
Wasp-class LHD X106. Naval Surface Combatants: US Navy amphibious assault ship class of eight ships, lead ship USS Wasp LHD-1 commissioned 1989.
WASS X91. Submarines and Submarine Cable Systems: Italian torpedo and underwater weapons firm, manufacturer of the Black Shark torpedo family.
Wassand Cable Landing X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: UK Yorkshire coast landfall complex for Hornsea export cables.