Maritime Acronyms and AbbreviationsThe maritime language is full of acronyms and abbreviations, some no longer recognised and some which are so familiar as to have become words in their own right, with what they stand either forgotten or not known. If you have a favourite well known or unfamiliar - add it to the lists by emailing it to AABS American Bureau of Shipping - also AB AEW Admiralty Experiment Works AHTS Anchor handling towage and supply AIS Automated identification system AMSA Australian Maritime Safety Authority AtoN Aid to Navigation BB Breadth or Beam BoT UK Board of Trade BV Bureau Veritas BWTS Ballast water treatment system CCb Block coefficient Cp Prismatic coefficient CFD Computational fluid dynamics CPD Continuing professional development CS Container ship DD Depth of ship DEMS Defensive Equipment Merchant Shipping DNC Director of Naval Construction DnV Det norske Veritas - also DNV and NV dwt Deadweight EECDIS Electronic chart display and information system EEZ Exclusive Economic Zone eLORAN enhanced Long Range Navigation EEDI Energy Efficiency Design Index FF Freeboard of ship FPSO Floating, production, storage and offloading FPV Fishery Protection Vessel GGA General arrangement GL Germanischer Lloyd GLA General Lighthouse Authorities (UK) GM Metacentric height GM Guided missile GPS Global Positioning System gt Gross tonnage HHFO Heavy fuel oil HMS Her Majesty’s Ship (UK) HSC High speed craft IIACS International Association of Classification Societies IALA International Association of Lighthouse Authorities IESIS Institution of Engineers and Shipbuilders in Scotland - also IESS IL Commissioners of Irish Lights - also CIL IMO International Maritime Organization ITTC International Towing Tank Conference J
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LLBP Length between perpendiculars - also Lpp LCG Longitudinal centre of gravity LED Light-emitting diode LLL Low level lighting LNG Liquid natural gas LOA Length overall LPG Liquid petroleum gas LR Lloyd’s Register also LRS LSA Life Saving Appliances LWL Length on waterline MMARPOL International Convention for the Prevention of Pollution from Ships MCA Maritime Coastguard Agency (UK) MCMV Mine Counter Measures Vessel MCR Maximum continuous rating MOPS Minimum Operational Performance Standards MV Motor Vessel MS Motor Ship NNLB Northern Lighthouse Board NK Nippon Kaiji Kyokai (Japan) -also ClassNK NMRI National Maritime Research Institute (Japan) NT Net tonnage OOBO Ore / Bulk / Oil OO Ore / Oil OPV Offshore Patrol Vessel PPCTC Pure car and truck carrier QQSMV Quadruple screw motor vessel QSS Quadruple screw steamship RRAS Replenishment at sea RCNC Royal Corps of Naval Constructors RFA Royal Fleet Auxiliary RINA Royal Institution of Naval Architects - formerly INA RMAS Royal Maritime Auxiliary Service RMS Royal Mail Ship RN Royal Navy (UK) RNC Royal Naval College RNLI Royal National Lifeboat Institution Ro-Pax Passenger ro-ro ferry RORO Roll on and roll off - also ro-ro ROV Remote operated vehicles RQD Raised quarter decker SS Wetted surface SAR Search and Rescue SNAME Society of Naval Architects and Marine Engineers (USA) SOLAS Safety of Life at Sea SS Steamship (single screw) TT Draft of ship TEU Twenty equivalent unit (containers) TSS Twin screw steamship TrSS Triple screw steamship UULCC Ultra large crude carrier ULCS Ultra large container ship USCG United States Coast Guard USS United States Ship
VVCG Vertical Centre of Gravity VLCC Very large crude carrier W
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