Glossary

Maritime glossary, terms beginning with M (page 5)

All maritime glossary terms that begin with the letter M, drawn from every subject section. 2781 entries.

Showing 250 of 2781 terms (page 5 of 12).

Master Drawings X54. Naval Architecture Software and IACS Rules: Approved class drawings retained by IACS societies for the life of the vessel.
Master Fishing License X87. Fishing Vessels and Fisheries Management: National qualification authorizing command of a fishing vessel above a defined size threshold.
Master fuel pump B2. Marine Engineering: Pump supplying main fuel rail.
Master GHG Database D6. Decarbonization, emissions and alternative fuels: Industry datasets compiling reported ship emissions.
Master ice navigator X27. Polar Code, Ice Navigation and Polar Operations: Informal title for officer holding STCW V/3 Advanced certificate of proficiency.
Master Key X48. Maritime Cybersecurity: Cryptographic key used to protect other keys, requiring stringent handling.
Master Lease X83. ISO Container Manufacturing and Leasing: Lease format allowing flexible movement of containers between geographic regions with payment based on actual use.
Master less than 3000 GT X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Regulation II/2 paragraph 3 CoC for medium ships.
Master less than 500 GT X21. STCW Certificates, Crewing and Seafarer Welfare: STCW Regulation II/3 CoC for masters of small ships in near coastal voyages.
Master Link X9. Cargo Securing, Lashing and Stability Vocabulary: Top connection ring of chain or wire sling assembly.
Master Mariner F3. Seafaring Life, Education, Professions and Institutions: Holder of an STCW unlimited deck Certificate of Competency.
Master Mariner (Unlimited) X160. Maritime Academies, Universities, and STCW Certification: STCW A-II/2 senior certificate of competency authorizing command of ships of 3,000 GT or more on unlimited voyages.
Master Mariner Examination X55. Marine Simulators, Training and Maritime Academies: Statutory examination administered by a flag state for certification as master under STCW Regulation II/2.
Master mariner investigator X163. Marine Accident Investigation Agencies and Landmark Inquiries: Senior investigator with deck command experience employed by national marine accident investigation bodies for navigation and bridge resource management cases.
Master Maritime Approval X96. Hull Integrity Monitoring and Strain Gauges: Approval letter from a classification society confirming HMS suitability for an assigned notation.
Master of Distressed Vessel X80. Maritime Search and Rescue Coordination: Person ultimately responsible for the casualty until rescue.
Master of Towing Vessels X103. US Inland Waterway Towing and Barge: The USCG license required to serve as captain of an inspected towing vessel.
Master pilot exchange X15. Ports, Terminals and Stevedoring: MPX, structured pre-arrival briefing.
Master plan C4. Ports, terminals and coastal/marine civil engineering: Port master plan for long term development.
Master Reference Terminal X68. Maritime Satcom and Telecommunications: VSAT hub component providing precise timing references.
Master Slave Load Sharing X67. Marine Electrical Systems and Shore Power: PMS scheme where one generator dictates frequency and the others follow in power output.
Master Tendering Notice of Readiness X51. Maritime Arbitration, Law and BIMCO Clauses: The master's act of formally communicating that the vessel is ready in fact and in law to load or discharge.
Master to ensure X7. Flag State, Port State Control and Detention Vocabulary: PSC action code 19, requiring the master to ensure rectification.
Master Under 3000 GT X160. Maritime Academies, Universities, and STCW Certification: STCW A-II/2 limited certificate of competency for ships less than 3,000 GT.
Master Under 500 GT X160. Maritime Academies, Universities, and STCW Certification: STCW A-II/3 certificate for command of ships less than 500 GT engaged on near-coastal voyages.
Master Yachts <200 GT X35. Yacht and Superyacht Industry: MCA STCW Code of Competency for command of yachts up to 200 GT.
Master Yachts <3000 GT X35. Yacht and Superyacht Industry: MCA STCW Code of Competency for command of yachts up to 3,000 GT.
Master Yachts <500 GT X35. Yacht and Superyacht Industry: MCA STCW Code of Competency for command of yachts up to 500 GT.
Master Yachts less than 3000 GT X156. Superyacht Industry, Builders, and Yacht Charter Market: MCA Certificate of Competency authorizing service as master of a yacht of less than 3,000 GT on unlimited voyages.
Master-pilot relationship X32. Marine Pilotage and Pilot Operations: Working relationship balancing the pilot's advisory role with the master's command authority.
Master's Authority A5. Maritime Law, private and commercial: Power to bind owner in contracts of necessity and salvage.
Master's authority over medical care X36. Shipboard Medical, Telemedicine and Seafarer Health: Master is ultimately responsible for seafarer health under MLC 2006 Standard A4.1.
Master's Authority to Sign LOF X60. Marine Salvage and Wreck Removal: Statutory and customary authority of the master to bind owners to LOF on behalf of vessel and cargo.
Master's Bond Book X120. Marine Catering, Provisions and Ship Chandlers: Onboard register of bonded stores with seal numbers and opening dates.
Master's Discretion A2. Maritime safety legislation: SOLAS and its codes: Preserved under SOLAS V/34-1.
Master's Discretion (Security) E1. Maritime security, geopolitics and risk: Master's overriding authority for ship safety/security.
Master's Duty to Render Assistance X60. Marine Salvage and Wreck Removal: Obligation under UNCLOS and SOLAS to render assistance to persons in distress at sea.
Master's overriding authority X32. Marine Pilotage and Pilot Operations: Master's right and duty to intervene and assume conduct when in his judgment the pilot's advice would hazard the ship, recognized under SOLAS V/19 and IMO Resolution A.960(23).
Master's protest C1. Commercial shipping, chartering, economics and finance: Sworn statement noting events potentially giving rise to claims.
Master's protest letter X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Formal note of disagreement issued by the master at delivery, often on quantity or sample handling.
Master's Receipt X5. Marine Surveying and Inspection: Receipt for cargo issued by master based on tally.
Master's Receipt Book X86. Port Agency, Husbandry and Disbursement: Receipt book in which the master signs for cash, stores, and documents.
Master's review C2. Ship operations, crewing and technical management: Annual ISM master's review of the SMS.
Master's standing orders X16. Nautical Science, Navigation and COLREGs: Written instructions to OOW.
MasterPower X123. Offshore Wind Installation Vessels and Operators: Hydraulic pile-driving hammer manufacturer brand owned by IHC IQIP.
Masthead light X19. Engine Room Watchkeeping and UMS Operations: Navigation light powered from emergency switchboard.
Mastic epoxy X45. Marine Paints, Coatings and Antifouling: Surface-tolerant epoxy formulated for application to manually prepared steel.
MASTREP X12. Maritime Casualties and Investigation: Australian Modernised Ship Reporting System operated by AMSA.
Mat-Supported Jackup X153. Offshore Drilling Rigs, FPSOs, and Offshore Vessels: Jackup whose legs are connected to a single mat at the seabed, useful in soft mud bottoms.
Matabungkay X124. Dredging Industry and Reclamation Contractors: Philippine reclamation location.
Matanuska X85. Ferries, Ro-Pax Operators and Routes: Alaska Marine Highway System ro-pax built 1963.
Matanza Reach X124. Dredging Industry and Reclamation Contractors: Long Beach Harbor.
Match Racing X84. Yacht Racing, Regattas and Sailing Governance: A format in which two yachts race head-to-head, central to the America's Cup.
Mate X3. Ship Handling, Seamanship and Deck Vocabulary: Deck officer subordinate to the master.
Mate (Fishing Vessel) X87. Fishing Vessels and Fisheries Management: Officer immediately subordinate to the skipper, qualifications addressed by STCW-F.
Mate's Receipt A5. Maritime Law, private and commercial: Receipt for goods loaded, preceding the bill of lading.
Material Adverse Change X49. Ship Finance, Leasing and Maritime Capital Markets: Drawstop trigger commonly negotiated in shipping facility agreements.
Material and Welding Requirements X8. IACS, Class Rules and Class Notations: IACS UR-W series defining materials, welding consumables and procedures.
Material Circumstance X4. Marine Insurance, P&I and Claims: information which would influence the judgment of a prudent insurer, relevant to fair presentation.
Material damage to a ship X163. Marine Accident Investigation Agencies and Landmark Inquiries: Casualty Investigation Code criterion for the serious marine casualty category covering damage that renders the ship unseaworthy.
Material Declaration Form X50. Ship Recycling, Demolition and Hong Kong Convention: The standardized supplier reporting format for IHM Part I substances above threshold.
Material Declaration MD X28. Ship Recycling and End-of-Life: Supplier-issued IHM data on materials in products and equipment.
Material handling equipment C3. Logistics, freight forwarding and multimodal trade: MHE in warehouses and terminals.
Material safety data sheet C2. Ship operations, crewing and technical management: MSDS or SDS for hazardous materials.
Material Safety Data Sheet Filing X86. Port Agency, Husbandry and Disbursement: Filing of MSDS for cargo with port authorities.
Material Safety Data Sheet Inventory X50. Ship Recycling, Demolition and Hong Kong Convention: The MSDS file referenced in IHM Part III for stores items at delivery.
Materials of construction X56. LNG/LPG Carriers and IGC Code: IGC Code Chapter 6 requirements specifying low-temperature steels, aluminum alloys, and nickel steels for cargo tanks based on design temperature.
Materials Test Report X75. IMDG Code, Classes, Packing and Segregation: MTR, supporting documentation for portable tank steels referenced by IMDG 6.7.
Matheson & Co X157. Marine Loss Adjusters, GA Practice, and Casualty Firms: Historic London average adjusters with practice integrated into the wider London adjusting community.
Mating Clamp X82. Saturation Diving and Offshore Diving Operations: Hydraulic clamp connecting the bell to the trunking.
Matrix tooling X42. Offshore Wind Installation and Cable Lay: Specialized blade mold infrastructure used by Vestas, Siemens Gamesa, and LM Wind Power.
Matthews Daniel X43. Marine Surveying and Warranty Surveying: A specialist marine warranty surveying firm with origins in the energy sector, providing offshore construction and towage attendance worldwide.
Mattress (Concrete) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Articulated concrete mattress placed over cables or pipelines for protection at crossings and rocky exposures.
Maturity Wall X49. Ship Finance, Leasing and Maritime Capital Markets: Aggregate volume of shipping debt falling due within a defined window.
Mauritania PSC X66. Port State Control and Regional MOUs: Abuja MOU member State.
Mauritius PSC X66. Port State Control and Regional MOUs: Indian Ocean MOU member State.
Maury, Matthew Fontaine X39. Pre-1900 Maritime History: United States Navy officer whose 1855 Physical Geography of the Sea established modern oceanography.
MAUSAM (Modernization of Alang Ship Recycling Yards) X118. Ship Recycling Yards, Beaches and Regulation: Joint India-Japan program announced under MoUs between the Indian Ministry of Shipping and JICA to upgrade Alang yards and worker welfare facilities.
MAUW X31. Helicopter Operations on Ships: Maximum All-Up Weight, total permissible helicopter weight at takeoff.
MAWB X6. Container, Intermodal and Trade Codes: Master Air Waybill.
Mawei Bunker Service X72. Bunkering Hubs and Bunker Suppliers: Bunker supply at the Port of Fuzhou Mawei by Sinopec Fujian Marine.
MAWP X75. IMDG Code, Classes, Packing and Segregation: Maximum Allowable Working Pressure for portable tanks, defined in IMDG 6.7.
MAWP (Maximum Allowable Working Pressure) X110. LNG Bunkering Infrastructure and Vessels: Pressure ceiling for IMO Type C LNG cargo tanks, typically maintained around 0.7 bar in bunkering operations.
Mawson Station X133. Polar Research Vessels and Polar Code Regimes: Australian Antarctic year-round station opened 1954, supplied by RSV Nuyina.
MaXAR / MarTrust / Maritime Authority Bulletins X148. Maritime Cybersecurity, IACS Cyber Rules, and Incidents: Various advisory channels disseminating cyber and GNSS warnings to mariners.
MaXccavator X59. Offshore Wind O&M, CTVs and SOVs: Mass flow excavation tool used to expose or rebury subsea cables on wind farm sites.
Maxi 100 X84. Yacht Racing, Regattas and Sailing Governance: A 100-foot maxi yacht size band, including yachts such as Wild Oats XI in Sydney Hobart.
Maxi 72 X84. Yacht Racing, Regattas and Sailing Governance: A grand prix class of 72-foot offshore racing yachts.
Maxi 80 X84. Yacht Racing, Regattas and Sailing Governance: An 80-foot maxi yacht size band, encompassing yachts such as Comanche.
Maxi Yacht F4. Recreational Boating, Yachting and Sport: Race yacht above 60 feet LOA.
Maxim Gorky X122. Submarine Cable Laying, Repair Vessels and Operators: Former Soviet cable ship operated by Sevmorput, retired in the 1990s.
Maximum Allowable Cargo Loading Limit (MARVS) X1. Cargo Science, Commodities and Cargo Care: IGC Code design parameter for gas tanks.
Maximum Allowable Interval X142. Classification Societies and Class Notations: 36 month maximum between bottom surveys and 60 month maximum for Special Surveys.
Maximum Allowable Working Pressure (MAWP) X1. Cargo Science, Commodities and Cargo Care: Container or tank design pressure rating.
Maximum boarding speed X32. Marine Pilotage and Pilot Operations: Upper limit of vessel speed during pilot embarkation, normally 7 knots.
Maximum Economic Yield (MEY) D4. Fisheries, aquaculture, blue economy and marine resources: Catch level maximizing resource rent.
Maximum expected time of rescue (MERT) X27. Polar Code, Ice Navigation and Polar Operations: Polar Code parameter, not less than 5 days for life-saving equipment.
Maximum Foreseeable Loss (MFL) X117. Marine Insurance Markets, Captives and Reinsurance: The largest theoretical loss from a worst-case scenario for an insured location.
Maximum Lashing Capacity X9. Cargo Securing, Lashing and Stability Vocabulary: Synonym for LC.
Maximum righting arm B1. Naval Architecture: Peak value of GZ on the stability curve.
Maximum righting arm GZmax X162. Naval Architecture, Stability, Resistance, and Structural Design: Peak value of the GZ curve, criterion in the IS Code requiring GZmax at angles not less than 25 degrees.
Maximum sailing draft X15. Ports, Terminals and Stevedoring: deepest permitted departure draft from a berth.
Maximum Securing Load X76. Stevedoring, Lashing and Cargo Securing: See MSL.
Maximum Securing Load (MSL) X9. Cargo Securing, Lashing and Stability Vocabulary: Maximum permitted load on a securing device per CSS Code Annex 13; MSL = 0.5 x BL (shackles, rings, deck fittings), 0.7 x BL (steel band one-way), 0.7 x BL (chains), 0.8 x BL (wire rope single use)…
Maximum Static Load (MSL) X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Per OCIMF MEG4, the maximum tension permitted in a mooring line under steady environmental loads, set at 50% of LDBF.
Maximum Sustainable Yield D3. Marine environmental science, pollution and conservation: Largest yield that can be taken from a stock indefinitely.
Maximum Sustainable Yield (MSY) X10. Marine Biology, Fisheries and Oceanography: Largest catch that can on average be taken indefinitely.
Maximum Time Interval X146. Port State Control Regimes, MoUs, and Inspection Systems: The longest interval between two routine PSC inspections allowed under the NIR for each risk profile.
Maximus X42. Offshore Wind Installation and Cable Lay: Reference offshore wind installation tool name; included only for completeness.
Maximus Air Cargo X104. Project Cargo Forwarders and Heavy Transport: UAE-based operator of Ilyushin Il-76 freighters used for outsize project moves.
Maxine Footwear Co Ltd v Canadian Government Merchant Marine [1959] AC 589 X143. Landmark Maritime Law Cases and Doctrines: Privy Council held that the seaworthiness obligation under article III rule 1 Hague Rules is an overriding obligation.
Maxsurf X54. Naval Architecture Software and IACS Rules: Naval architecture software suite from Bentley Systems comprising Modeler, Resistance, Stability, Motions, and Structure modules.
Maxsurf Modeler X54. Naval Architecture Software and IACS Rules: Hull surface modeling module within the Maxsurf suite using NURBS surfaces.
Maxsurf Motions X54. Naval Architecture Software and IACS Rules: Seakeeping analysis module within Maxsurf based on strip theory and panel methods.
Maxsurf Resistance X54. Naval Architecture Software and IACS Rules: Resistance estimation module within Maxsurf implementing Holtrop, Hollenbach, and other methods.
Maxsurf Stability X54. Naval Architecture Software and IACS Rules: Intact and damage stability module within the Maxsurf suite.
Maxsurf Structure X54. Naval Architecture Software and IACS Rules: Ship structural design module within the Maxsurf suite.
Maxximum X65. ROVs, AUVs, USVs and Marine Robotics: Oceaneering work-class ROV historically used in deepwater drilling and construction support.
Maya class X11. Naval Vessels, Warship Systems and Naval Architecture: JMSDF Aegis DDG with cooperative engagement capability, lead ship DDG-179.
Maya-class destroyer X106. Naval Surface Combatants: JMSDF Aegis destroyer class of two ships JS Maya DDG-179 commissioned 2020 and JS Haguro DDG-180 commissioned 2021.
Maybe X128. Sail Training Ships and Tall Ship Associations: 1929 UK two masted gaff ketch, 32 m sparred length, sail training vessel often participating in STI Class B.
Mayday X80. Maritime Search and Rescue Coordination: Voice radiotelephone distress signal repeated three times.
Mayday Relay X80. Maritime Search and Rescue Coordination: Voice distress relay by a third party on behalf of the casualty.
Maydays F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Voice distress signal repeated three times on VHF channel 16.
Mayer Brown X114. Maritime Arbitration and Shipping Law Firms: International firm with an admiralty and aviation practice in London, New York, and Hong Kong.
Mayflower F1. Maritime History: 1620 English vessel that carried the Pilgrim Fathers to Plymouth.
Mayflower Autonomous Ship X65. ROVs, AUVs, USVs and Marine Robotics: ProMare and IBM unmanned trimaran USV that completed an unmanned Atlantic crossing in 2022.
Mayflower Terminal X164. Cruise Industry, Brands, Ship Classes, and Terminals: The Southampton cruise terminal also designated Berth 106, one of four cruise berths at the Port of Southampton.
Mayflower Wind X42. Offshore Wind Installation and Cable Lay: Former name of the SouthCoast Wind offshore project off Massachusetts.
Mazagon Dock X62. Naval Warships and Combat Systems: Indian shipbuilder constructing Scorpene-class submarines and destroyers in Mumbai.
Mazagon Dock Shipbuilders X58. Shipbuilding Yards and Construction: Indian state shipbuilder at Mumbai, building destroyers, frigates, and submarines.
Mazagon Dock Shipbuilders Limited (MDL) X91. Submarines and Submarine Cable Systems: Indian shipyard at Mumbai constructing Kalvari-class Scorpene submarines.
MB92 Barcelona X156. Superyacht Industry, Builders, and Yacht Charter Market: Refit yard at Barcelona, part of MB92 Group, with multiple dry docks for yachts up to about 215 meters.
MB92 Group X156. Superyacht Industry, Builders, and Yacht Charter Market: International refit group with yards at Barcelona and La Ciotat, the largest superyacht refit operator in the Mediterranean.
MB92 La Ciotat X156. Superyacht Industry, Builders, and Yacht Charter Market: Refit yard at La Ciotat, France, operating the 4,000 ton ship lift and dry dock for very large yachts.
MBARI Doc Ricketts X65. ROVs, AUVs, USVs and Marine Robotics: Successor science work-class ROV to Tiburon at MBARI rated to 4,000 m.
MBARI Tiburon X65. ROVs, AUVs, USVs and Marine Robotics: Research work-class ROV historically operated by the Monterey Bay Aquarium Research Institute.
MBARI Ventana X65. ROVs, AUVs, USVs and Marine Robotics: Long-serving MBARI inspection and science ROV with a single-mode fiber tether.
MBDA X91. Submarines and Submarine Cable Systems: European missile prime contractor providing submarine-launched cruise missiles for European navies.
MBES X73. Marine Hydrography, Charting and ENC: Multibeam Echo Sounder, the principal modern bathymetric survey instrument.
MBES (Multibeam Echosounder) X129. Hydrographic Offices, Survey Vessels and Marine Cartography: Acoustic sonar that ensonifies a fan of beams across the vessel track to produce a swath of depth measurements per ping.
MBL X6. Container, Intermodal and Trade Codes: Master bill of lading.
MBL (Minimum Breaking Load) X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: Certified minimum breaking strength of a rope, wire, or chain as supplied.
MBR cable house X122. Submarine Cable Laying, Repair Vessels and Operators: Marine Beach Manhole architecture used at the surf zone transition.
MC X90. Marine Engine Specific Model Enumeration: MAN B&W camshaft controlled mechanical two-stroke designation for the legacy non-electronic platform.
MC-C X90. Marine Engine Specific Model Enumeration: MAN B&W compact camshaft controlled mechanical two-stroke designation for shorter overall length than the MC.
MCA X13. Marine Salvage and Wreck Removal: UK Maritime and Coastguard Agency, responsible for SOSREP intervention.
MCA (Maritime and Coastguard Agency) X35. Yacht and Superyacht Industry: UK maritime regulator that originated the Large Yacht Code framework.
MCA Approved Doctor X36. Shipboard Medical, Telemedicine and Seafarer Health: UK Maritime and Coastguard Agency physician authorized to issue ENG 1 certificates.
MCA Catering Inspection X120. Marine Catering, Provisions and Ship Chandlers: UK Maritime and Coastguard Agency inspection of galley and crew accommodation under MLC.
MCA Engineer Y1/Y2/Y3/Y4 X35. Yacht and Superyacht Industry: Tiered MCA Marine Engineer Officer (Yacht) certificates of competency.
MCA MSN 1839 X36. Shipboard Medical, Telemedicine and Seafarer Health: Merchant Shipping Notice on seafarer medical certification standards.
MCA Surveyor X43. Marine Surveying and Warranty Surveying: A field surveyor of the United Kingdom Maritime and Coastguard Agency conducting flag state and port state inspections.
McAllister Towing X30. Tug Operations and Harbour Towage: US East Coast harbor towage operator.
McAlpine Locks and Dam X103. US Inland Waterway Towing and Barge: The Ohio River navigation structure at Louisville, Kentucky bypassing the Falls of the Ohio.
MCB X67. Marine Electrical Systems and Shore Power: Miniature circuit breaker used in marine lighting, navigation, and small load circuits.
MCC X61. Marine Lubricants and Cylinder Oils: Mean cylinder condition assessment based on scrape-down sampling, inspection, and feed-rate optimization.
MCCB X67. Marine Electrical Systems and Shore Power: Molded case circuit breaker used in marine distribution panels up to about 1,600 A.
McClellan-Kerr Arkansas River Navigation System X103. US Inland Waterway Towing and Barge: The US Army Corps of Engineers system of locks and dams extending navigation on the Arkansas River to Catoosa, Oklahoma.
McDermott X42. Offshore Wind Installation and Cable Lay: US offshore contractor with limited offshore wind involvement; reference for context.
McDermott DLV 2000 X60. Marine Salvage and Wreck Removal: McDermott derrick lay vessel with heavy lift capability for offshore decommissioning.
MCFC (Molten Carbonate Fuel Cell) X34. Decarbonization, Alternative Fuels and Carbon Pricing: High-temperature fuel cell suitable for combined heat and power; tested on cruise ships.
MCG X102. Seafarer Welfare and Maritime Charities: Maritime Charities Group, the UK funders' forum for maritime welfare research and grant programs.
MCI X70. Reefer Containers and Cold Chain Shipping: Common abbreviation for Maersk Container Industry, the Star Cool manufacturer based at Tinglev and Qingdao.
MCI-Daikin X70. Reefer Containers and Cold Chain Shipping: Industrial collaboration on reefer machinery between Maersk Container Industry and Daikin.
McKenzie Marine X137. Harbour Tugs, Towage Operators and Tug Builders: Smaller Canadian harbour tug operator on the St. Lawrence.
McLarens Marine X157. Marine Loss Adjusters, GA Practice, and Casualty Firms: Marine and transportation division of McLarens, an international independent loss adjusting group.
MCM X11. Naval Vessels, Warship Systems and Naval Architecture: Mine countermeasures vessel hull symbol.
MCM Mission Package X77. Naval Mine Warfare and Mine Countermeasures: The modular suite of sensors, vehicles, and effectors developed for the US Navy LCS to conduct mine countermeasures.
MCM-1 Avenger X77. Naval Mine Warfare and Mine Countermeasures: The lead ship of the US Navy Avenger-class mine countermeasures ships.
McMurdo X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: UK manufacturer of EPIRBs and AIS-SARTs (e.g., Smartfind G8, Smartfind S20).
McMurdo FastFind 220 X95. GMDSS Equipment and Survival Craft Communications: McMurdo personal locator beacon transmitting on 406 MHz Cospas-Sarsat with internal GPS.
McMurdo Group X95. GMDSS Equipment and Survival Craft Communications: United Kingdom manufacturer of GMDSS equipment historically based in Portsmouth, producing the SmartFind, FastFind, and NAV product lines.
McMurdo M10 X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: McMurdo AIS-SART search and rescue locator beacon.
McMurdo M5 X168. Bridge Electronics: Radar, ECDIS, GMDSS, and IBS: McMurdo AIS Class A transponder, part of the Orolia maritime portfolio.
McMurdo NAV6 Plus X95. GMDSS Equipment and Survival Craft Communications: McMurdo NAVTEX receiver operating on 518 kHz, 490 kHz, and 4209.5 kHz.
McMurdo R10 AIS MOB X95. GMDSS Equipment and Survival Craft Communications: McMurdo AIS man overboard device transmitting on AIS channels 87B and 88B.
McMurdo R5 GMDSS X95. GMDSS Equipment and Survival Craft Communications: McMurdo two way portable VHF radio in safety yellow for survival craft use.
McMurdo S20 MOB X95. GMDSS Equipment and Survival Craft Communications: McMurdo AIS man overboard device transmitting on AIS channels 87B and 88B.
McMurdo SmartFind X74. AIS Data, Vessel Tracking and Maritime Intelligence: AIS SART and AIS MOB product line from Orolia Maritime.
McMurdo SmartFind G8 EPIRB X95. GMDSS Equipment and Survival Craft Communications: McMurdo 406 MHz Cospas-Sarsat EPIRB with internal 66-channel GPS.
McMurdo SmartFind R5 AIS SART X95. GMDSS Equipment and Survival Craft Communications: McMurdo AIS Search and Rescue Transmitter operating on AIS channels 87B and 88B.
McMurdo SmartFind R5 SART X95. GMDSS Equipment and Survival Craft Communications: McMurdo 9 GHz X band radar Search and Rescue Transponder.
McMurdo SmartFind S5 PLB X95. GMDSS Equipment and Survival Craft Communications: McMurdo personal locator beacon transmitting on 406 MHz Cospas-Sarsat.
McMurdo Sound X97. Polar Expedition Cruise and IAATO Operations: Southern Ross Sea destination of long Ross Sea expedition itineraries and home to McMurdo Station and Scott Base.
McMurdo Station X133. Polar Research Vessels and Polar Code Regimes: USAP largest Antarctic station, Ross Island, supplied via fuel tanker and freighter convoy escorted by Polar Star.
MCMV X77. Naval Mine Warfare and Mine Countermeasures: An acronym for Mine Countermeasures Vessel covering both minehunters and minesweepers.
McQuilling Services X71. Shipbrokers and Brokerage Firms: New York-based tanker brokerage, consultancy, and operations services firm.
MCR X19. Engine Room Watchkeeping and UMS Operations: Maximum continuous rating, the highest power for continuous operation.
MCR (Micro Carbon Residue) X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Carbon residue test per ISO 10370, modern replacement for CCR.
MCR Maximum Continuous Rating X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Engine power at which it can be operated continuously without time limit, the reference output for design and survey purposes.
MCS (Monitoring, Control and Surveillance) D4. Fisheries, aquaculture, blue economy and marine resources: Enforcement framework for fisheries.
MCS Yachting X156. Superyacht Industry, Builders, and Yacht Charter Market: International brokerage and charter firm with offices in Monaco and elsewhere offering large yacht services.
MCT Brindisi X124. Dredging Industry and Reclamation Contractors: Italian container terminal expansion with Italian dredgers.
MCT1cm B1. Naval Architecture: Moment to change trim 1 cm.
MCTC X155. Marine Surveying Practice and Cargo Inspection: The Moment to Change Trim one centimeter, a hydrostatic table value used in draft survey trim corrections.
MD-902 X31. Helicopter Operations on Ships: McDonnell Douglas Explorer NOTAR single-engine helicopter, EMS and offshore use.
MD-SDoC Process X28. Ship Recycling and End-of-Life: Material Declaration plus Supplier's Declaration of Conformity in IHM development.
MDAT-GoG X22. Piracy, Maritime Security and Armed Protection: Maritime Domain Awareness for Trade Gulf of Guinea, French and UK navy facility based in Brest.
MDGF X6. Container, Intermodal and Trade Codes: Multimodal Dangerous Goods Form, IMO-recommended consolidated DG declaration for sea moves.
MDLT X52. Polar Code, Arctic and Antarctic Shipping: Mean Daily Low Temperature, the climatological statistic used by the Polar Code to define Polar Service Temperature.
MDM mine X77. Naval Mine Warfare and Mine Countermeasures: A Russian sea mine family of the modern era.
MDO X19. Engine Room Watchkeeping and UMS Operations: Marine diesel oil, distillate fuel per ISO 8217 DMB.
MDO (Marine Diesel Oil) X149. Marine Fuels, Bunkering, and Alternative Fuels: A distillate or distillate-residual blend marine fuel, generally corresponding to ISO 8217 DMB grade.
MDR X24. Cruise, Passenger Ship and Ferry Operations: Main Dining Room on cruise ships, typically open seating or fixed seating.
MDV 1200 X132. High-Speed Craft, Hydrofoils and Ferry Operators: Fincantieri monohull HSC of 95 m, including Aquastrada series for Tirrenia.
MDV 3000 X132. High-Speed Craft, Hydrofoils and Ferry Operators: Larger Fincantieri monohull HSC including Capricia and Capricorn for Caremar.
ME X90. Marine Engine Specific Model Enumeration: MAN B&W electronically controlled two-stroke designation with hydraulic-electronic fuel injection and exhaust valve actuation.
ME Surveying X43. Marine Surveying and Warranty Surveying: Marine and Energy Surveying, an independent warranty and consultancy practice serving the offshore renewables and oil and gas sectors.
ME-B X90. Marine Engine Specific Model Enumeration: MAN B&W simplified electronically controlled two-stroke designation aimed at smaller bore engines with reduced control complexity.
ME-C X90. Marine Engine Specific Model Enumeration: MAN B&W compact electronically controlled two-stroke designation indicating shorter engine length.
ME-GI X90. Marine Engine Specific Model Enumeration: MAN B&W gas injection dual-fuel two-stroke variant operating on high-pressure methane using a diesel combustion cycle.
ME-LGI X90. Marine Engine Specific Model Enumeration: MAN B&W liquid gas injection two-stroke platform for methanol, LPG, ethane, and ammonia.
ME-LGIA X90. Marine Engine Specific Model Enumeration: MAN B&W liquid gas injection two-stroke variant for ammonia fuel.
ME-LGIE X90. Marine Engine Specific Model Enumeration: MAN B&W liquid gas injection two-stroke variant for ethane fuel.
ME-LGIM X90. Marine Engine Specific Model Enumeration: MAN B&W liquid gas injection two-stroke variant for methanol fuel.
ME-LGIP X90. Marine Engine Specific Model Enumeration: MAN B&W liquid gas injection two-stroke variant for liquefied petroleum gas fuel.
MEA (Monoethanolamine) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Standard amine solvent for post-combustion CO2 capture.
Meal, Soybean X1. Cargo Science, Commodities and Cargo Care: Self-heating Group B; risk of mold.
Mean Draft of Means X5. Marine Surveying and Inspection: Final mean draft after first and second trim corrections.
Mean Effective Pressure mep X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Indicator-diagram-derived average cylinder pressure used to calculate indicated power per cylinder.
Mean High Water (MHW) D2. Hydrography, tides, waves, bathymetry and marine geology: Average of all high waters over a tidal datum epoch.
Mean High Water Springs (MHWS) D2. Hydrography, tides, waves, bathymetry and marine geology: Average level of all high waters at spring tides.
Mean Higher High Water (MHHW) D2. Hydrography, tides, waves, bathymetry and marine geology: Average of higher high waters over a tidal datum epoch.
Mean Low Water (MLW) D2. Hydrography, tides, waves, bathymetry and marine geology: Average of all low waters over a tidal datum epoch.
Mean Low Water Springs (MLWS) D2. Hydrography, tides, waves, bathymetry and marine geology: Average level of all low waters at spring tides.
Mean Lower Low Water (MLLW) D2. Hydrography, tides, waves, bathymetry and marine geology: Average of lower low waters, common datum in US waters.
Mean of Means X5. Marine Surveying and Inspection: Calculation step combining forward, aft, and midship drafts.
Mean of Means Draft X155. Marine Surveying Practice and Cargo Inspection: The corrected mean draft used in draft surveys, calculated from forward, aft, and midship readings to account for hog and sag.
Mean sea level X42. Offshore Wind Installation and Cable Lay: Datum used in offshore wind structural design and elevations.
Mean sea level (MSL) B3. Nautical Science: Average level of the sea surface.
Mean solar time X16. Nautical Science, Navigation and COLREGs: Time based on a fictitious mean Sun moving uniformly.
Mean time between failures X59. Offshore Wind O&M, CTVs and SOVs: MTBF, reliability metric averaging the operating time between consecutive failures of a component.
Mean Time to Detect X48. Maritime Cybersecurity: Average time between the onset of a malicious event and its detection.
Mean time to repair X59. Offshore Wind O&M, CTVs and SOVs: MTTR, average elapsed time to complete a corrective intervention and return a turbine to service.
Mean Time to Respond X48. Maritime Cybersecurity: Average time between detection of a cyber event and effective response.
Mean Wetted Surface X54. Naval Architecture Software and IACS Rules: Reference area used in resistance coefficient nondimensionalization.
Measurement Survey X5. Marine Surveying and Inspection: Tonnage measurement for issuance of tonnage certificates.
Measurement Ton X1. Cargo Science, Commodities and Cargo Care: 1 cubic meter (formerly 40 cubic feet).
Meat Slicer X120. Marine Catering, Provisions and Ship Chandlers: IMPA 174432 commercial slicer, Hobart and Bizerba common brands.
MEBA X102. Seafarer Welfare and Maritime Charities: Marine Engineers' Beneficial Association, US union representing licensed marine engineers and deck officers, founded 1875.
Mechanical X54. Naval Architecture Software and IACS Rules: Ansys structural mechanics application within Ansys Workbench.
Mechanical Completion X104. Project Cargo Forwarders and Heavy Transport: Milestone confirming a plant or module is fully assembled before commissioning.
Mechanical Efficiency etaM X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Ratio of brake power to indicated power, typically 0.88 to 0.93 for large two-stroke engines and 0.85 to 0.90 for medium-speed.
Mechanical minesweeping X77. Naval Mine Warfare and Mine Countermeasures: The use of paravanes, otter boards, and cutters to part the mooring cables of contact mines.
Mechanical Pilot Hoist X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Powered device formerly used to lift the pilot, banned by IMO under Resolution A.275(VIII) and subsequent amendments since 1986.
Mechanical seal X19. Engine Room Watchkeeping and UMS Operations: Spring loaded face seal on pump shafts.
Mechanical Ventilation X1. Cargo Science, Commodities and Cargo Care: Powered fans serving cargo holds.
Mecklenburger Metallguss (MMG) X38. Propellers, Stern Gear and Shaft Lines: German propeller foundry casting some of the world's largest bronze propellers, including 11 m diameter units.
MED X21. STCW Certificates, Crewing and Seafarer Welfare: Medical Care, STCW VI/4 paragraph 2.