Glossary

Maritime glossary, terms beginning with M (page 7)

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

Showing 250 of 2781 terms (page 7 of 12).

Merchant Marine Academy of Aspropyrgos X55. Marine Simulators, Training and Maritime Academies: Greek public academy near Athens training deck and engine officers.
Merchant Marine Academy of Hydra X55. Marine Simulators, Training and Maritime Academies: Greek academy on the island of Hydra training deck officers.
Merchant Marine Academy of Macedonia X55. Marine Simulators, Training and Maritime Academies: Greek academy in Nea Mihaniona training deck and engine officers.
Merchant Marine Act of 1920 X98. Ship Registries and Flag States: US statute known as the Jones Act, restricting US domestic coastal trade.
Merchant Marine Personnel Advisory Committee (MERPAC) F3. Seafaring Life, Education, Professions and Institutions: USCG advisory committee.
Merchant Navy F1. Maritime History: Collective civilian shipping fleet of a nation, particularly the British Merchant Navy.
Merchant Navy Officers' Pension Fund X102. Seafarer Welfare and Maritime Charities: UK pension scheme serving merchant navy officers, with welfare connections to MNWB.
Merchant Navy Training Board (MNTB) X102. Seafarer Welfare and Maritime Charities: UK training body within the UK Chamber of Shipping that oversees cadet sponsorship.
Merchant Navy Welfare Board (MNWB) X102. Seafarer Welfare and Maritime Charities: UK umbrella charity coordinating port welfare in the United Kingdom.
Merchant Seamen's Memorial X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Tower Hill, London, memorial maintained by Trinity House and the Commonwealth War Graves Commission.
Merchant Shipping Act X98. Ship Registries and Flag States: General label for national statutes governing ship registration, manning, and safety in many Commonwealth jurisdictions.
Merchant Shipping Act 1854 X39. Pre-1900 Maritime History: British statute codifying the regulation of merchant shipping under the Board of Trade.
Merchant Shipping Act 1876 X39. Pre-1900 Maritime History: British statute that introduced the load line championed by Samuel Plimsoll.
Merchant Shipping Act 1894 X39. Pre-1900 Maritime History: Consolidating British statute that remained the principal merchant shipping law for most of the twentieth century.
Merchant Shipping Act 1995 (UK) X143. Landmark Maritime Law Cases and Doctrines: Consolidating statute of UK maritime law.
Merck Quantofix X88. Marine Surface Preparation and Coatings Application: Test paper system manufactured by Macherey-Nagel and historically Merck for semi-quantitative detection of dissolved ions including iron.
Mercuria X149. Marine Fuels, Bunkering, and Alternative Fuels: A Swiss-based global commodity trader active in marine bunker trading and physical supply.
Mercuria Energy Trading X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: Swiss commodity house and bunker trader, parent of Minerva Bunkering after 2018 restructuring.
Mercuria Marine Fuels X72. Bunkering Hubs and Bunker Suppliers: Marine fuels desk of Mercuria Energy Group active in ARA, Singapore, Fujairah, and Panama.
Mercurial barometer X16. Nautical Science, Navigation and COLREGs: Barometer using a column of mercury.
Mercury X28. Ship Recycling and End-of-Life: Heavy metal listed in IHM Table A, found in switches, lamps, and thermometers.
Mercury (Marine) D3. Marine environmental science, pollution and conservation: Heavy metal pollutant addressed under the Minamata Convention.
Mercury Compounds Solid NOS X75. IMDG Code, Classes, Packing and Segregation: UN 2025, Class 6.1.
Mercury Fulminate Wetted X75. IMDG Code, Classes, Packing and Segregation: UN 0135, Class 1.1A primary explosive.
Mercury Inventory X50. Ship Recycling, Demolition and Hong Kong Convention: The IHM Part I record of mercury in level switches, fluorescent tubes, and legacy thermometers aboard.
Mercury Switch Removal X28. Ship Recycling and End-of-Life: Targeted removal program for hazardous mercury-containing components.
Mercury thermometer X45. Marine Paints, Coatings and Antifouling: Older instrument once used for steel temperature measurement, now replaced by digital probes.
Mercury-Containing Equipment X118. Ship Recycling Yards, Beaches and Regulation: Switches, level gauges, and thermometers listed in IHM Part I requiring controlled removal.
MERCY (USNS Mercy) E1. Maritime security, geopolitics and risk: Hospital ship, illustrative of auxiliary classes (defense overlap).
Mercy Ships Welfare Adjacency X154. Maritime Welfare, Seafarer Charities, and MLC Rights: Hospital-ship charity occasionally cooperating with mainstream seafarer welfare bodies.
Merger Tracking System (MTS) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Industry shorthand for shipping AIS analytics used by cable insurers to track aggressive anchor scope behavior.
MERI Kolkata X121. Maritime Education, Academies and Universities: See Marine Engineering and Research Institute.
Meriaura Group X137. Harbour Tugs, Towage Operators and Tug Builders: Finnish marine operator with small tug fleet.
Meridian F5. The Reference Layer: Glossary, Units, Signals and Information Sources: Great circle through both geographic poles.
Meridian altitude B3. Nautical Science: Altitude of body on observer's meridian.
Meridian passage X16. Nautical Science, Navigation and COLREGs: Instant when a body crosses the observer's meridian.
Meridian passage (LAN) B3. Nautical Science: Transit of body across observer's meridian.
Meridional Heat Transport D5. Coastal processes, sea-level, cryosphere and ocean observation science: North-south transport of heat by ocean and atmosphere.
Meridional Overturning Circulation D1. Physical and chemical oceanography and marine meteorology: Zonally integrated north-south circulation in an ocean basin.
Merits Hearing X51. Maritime Arbitration, Law and BIMCO Clauses: The oral hearing at which evidence and submissions on substantive issues are made to the tribunal.
Merlin X31. Helicopter Operations on Ships: AW101 military variant used by Royal Navy and other services.
Merlin Rocket F4. Recreational Boating, Yachting and Sport: Development-class British dinghy.
Merluza Hubbsi X87. Fishing Vessels and Fisheries Management: Spanish trade name for Argentine hake (Merluccius hubbsi).
Mermaid F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Cross-cultural maritime mythological figure.
Mermaid Maritime X82. Saturation Diving and Offshore Diving Operations: Bangkok-listed subsea services contractor.
Mermaid Subsea Services X82. Saturation Diving and Offshore Diving Operations: Group encompassing Mermaid's diving and inspection operations.
Merritt-Brown gear X38. Propellers, Stern Gear and Shaft Lines: Historic naval reduction gear designs informing modern double-reduction marine gearboxes.
MERS Clause X53. Marine Insurance, P&I and Hull Clauses: A clause referring to mutual emergency response systems for ports and terminals.
MERS-CoV X36. Shipboard Medical, Telemedicine and Seafarer Health: Middle East Respiratory Syndrome coronavirus; relevant to Gulf-region port calls.
MERS-CoV Guidance X41. Cruise Ship Public Health and VSP/USPH: CDC advisory occasionally cited for cruise vessels calling at ports in the Arabian Peninsula.
MERSAR X80. Maritime Search and Rescue Coordination: Merchant Ship Search and Rescue Manual, the predecessor to IAMSAR.
MERSAR / IAMSAR E3. Technology, digitalization and smart shipping: SAR coordination publications.
Mersey Maritime Training Group X121. Maritime Education, Academies and Universities: Liverpool regional industry training co-operative.
Mersey Mission to Seafarers X102. Seafarer Welfare and Maritime Charities: Independent port chaplaincy serving the ports of Liverpool, Birkenhead, and the Manchester Ship Canal.
Mersey Tidal Power X57. Ocean Energy Beyond Wind: UK study led by the Liverpool City Region for a tidal range scheme in the Mersey estuary.
Merseyside Maritime Museum F2. Maritime Culture, Heritage, Archaeology, Art and Museums: Liverpool institution covering port and emigration history.
Mersin International Port X138. Global Container Terminal Operators and Port Equipment: Turkish southern facility owned by PSA International 50 percent and IFM Investors 50 percent since 2007.
Mertcable X122. Submarine Cable Laying, Repair Vessels and Operators: See SubCom legacy product, repeater housing line.
Mertcan Yachts X125. Superyacht Industry, Builders and Brokers: Turkish smaller scale builder.
Mertec X122. Submarine Cable Laying, Repair Vessels and Operators: Brazilian-based cable ship operator, vessel CS Brusa originally chartered.
MES X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Mobile Earth Station; in Inmarsat terminology, a shipborne satellite terminal.
MES drill X170. SOLAS 1974 Convention: Chapter-by-Chapter Glossary: Crew familiarization with marine evacuation system required by SOLAS III/19, with full deployment at intervals not exceeding two years.
MES Maizuru X62. Naval Warships and Combat Systems: Mitsui shipyard at Maizuru building escort ships for the JMSDF.
MES-MAN B&W X90. Marine Engine Specific Model Enumeration: Mitsui E&S production line of licensed MAN B&W two-stroke marine engines.
MESCO X169. Container Terminal Cranes, Yard Equipment, and Lashing: Mitsui Engineering and Shipbuilding Co., Japanese maker of STS cranes, RTGs, and unloaders, predecessor in port cranes to Mitsui E&S Machinery.
MESH (Mapping European Seabed Habitats) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Research project providing seabed habitat maps used in MSP and cable EIA processes.
Mesh Adaption X54. Naval Architecture Software and IACS Rules: Automatic refinement based on flow gradients in STAR-CCM+ and Fluent CFD runs.
Mesh Filter X126. Marine Oil Spill Response and OPRC Regimes: Net assembly used in shoreline tar-ball recovery.
Mesh Network (satellite) X68. Maritime Satcom and Telecommunications: Configuration in which terminals communicate directly via satellite without routing all traffic through a hub.
Mesh Size Regulation D4. Fisheries, aquaculture, blue economy and marine resources: Minimum mesh size rules to allow juvenile escape.
MESMA AIP X91. Submarines and Submarine Cable Systems: French air-independent propulsion system originally developed by DCNS, now Naval Group.
Mesne Profits X51. Maritime Arbitration, Law and BIMCO Clauses: Damages recoverable for wrongful detention or use of property between events such as conversion and recovery.
Mesoderm X10. Marine Biology, Fisheries and Oceanography: Embryological tissue layer; in jellyfish lineages is jelly-like mesoglea.
Mesopelagic zone X10. Marine Biology, Fisheries and Oceanography: Twilight ocean layer from about 200 to 1,000 m depth.
Mesoscale Eddy D1. Physical and chemical oceanography and marine meteorology: Coherent rotating ocean feature with scales of tens to hundreds of kilometers.
Mesotech X65. ROVs, AUVs, USVs and Marine Robotics: Kongsberg Mesotech brand of mechanical scanning and multibeam imaging sonars used on ROVs.
Mesotech 1071 X65. ROVs, AUVs, USVs and Marine Robotics: Kongsberg Mesotech mechanical scanning sonar widely fitted to work-class ROVs.
Mesothelioma Risk X28. Ship Recycling and End-of-Life: Long-latency cancer associated with asbestos exposure in recycling workers.
Mess Room Stores X120. Marine Catering, Provisions and Ship Chandlers: Crockery, cutlery, and glassware under IMPA section 17, replenished routinely by chandlers.
Messenger X3. Ship Handling, Seamanship and Deck Vocabulary: Light line used to haul a heavier line.
MET X21. STCW Certificates, Crewing and Seafarer Welfare: Maritime Education and Training.
MET University Simulator Centre X144. Bridge Simulators, Engine Room Simulators, and Maritime Training Equipment: World Maritime University Malmo Sweden does not operate a bridge simulator but partners with Chalmers Lindholmen.
MET-MA Turbocharger X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Mitsubishi Heavy Industries axial-flow turbocharger first-generation for large two-stroke engines.
MET-MB Turbocharger X174. Marine Engine Maintenance, Overhaul, and Condition Monitoring: Mitsubishi MET second-generation axial turbocharger with hybrid bearings and improved efficiency.
Meta Object X73. Marine Hydrography, Charting and ENC: An S-57 object class describing metadata about a coverage area, such as M_CSCL, M_QUAL, M_COVR.
Metacenter (M) B1. Naval Architecture: Intersection of buoyancy verticals at small heel.
Metacentre (M) X9. Cargo Securing, Lashing and Stability Vocabulary: Point through which buoyancy force acts for small heel angles.
Metacentric Height X54. Naval Architecture Software and IACS Rules: GM, primary measure of initial transverse stability computed in NAPA, GHS, and Maxsurf.
Metacentric Height (GM) X9. Cargo Securing, Lashing and Stability Vocabulary: See GM.
Metacentric radius (BM) B1. Naval Architecture: I_T/V, transverse moment of waterplane area over volume.
Metal Drum X75. IMDG Code, Classes, Packing and Segregation: Packaging codes 1A1, 1A2, 1B1, 1B2 with packing group performance markings.
Metal Foil Strain Gauge X96. Hull Integrity Monitoring and Strain Gauges: Strain gauge using a patterned metal foil grid on a polymer backing.
Metal Hydrides Water Reactive NOS X75. IMDG Code, Classes, Packing and Segregation: UN 1409, Class 4.3.
Metal Shark X137. Harbour Tugs, Towage Operators and Tug Builders: Louisiana builder of pilot boats and small workboats including harbour tugs.
Metal Spray X88. Marine Surface Preparation and Coatings Application: Application of zinc, aluminum, or zinc-aluminum coating by arc or flame spray per AWS C2.18 and ISO 2063.
Metallic Concentrates X1. Cargo Science, Commodities and Cargo Care: Lead, zinc, copper, nickel; Group A with strict TML control.
Metallizing X45. Marine Paints, Coatings and Antifouling: Thermal spray of zinc or aluminum on steel to provide long-life corrosion protection.
Metallurgical Investigation X157. Marine Loss Adjusters, GA Practice, and Casualty Firms: Laboratory analysis of fractures, corrosion, or fatigue in ship structures and machinery used in casualty investigation.
MeteoGroup MeteoConsult X78. Voyage Optimization and Vessel Performance Software: A weather services business, including marine routing products, that was rebranded under DTN following its acquisition.
Meteorlogix X78. Voyage Optimization and Vessel Performance Software: A historical weather information provider whose marine assets were integrated into the lineage of DTN Maritime products.
Meteorological tide X16. Nautical Science, Navigation and COLREGs: Departure of actual tide from predicted due to weather effects.
Meteotsunami D2. Hydrography, tides, waves, bathymetry and marine geology: Tsunami-like wave generated by atmospheric pressure disturbances.
Methacrylic Acid X93. IBC Code and Chemical Tanker Operations: Carboxylic monomer requiring polymerization inhibitor and Type 2 ship carriage with Category Y status under Annex II.
Methane (CH4) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Principal LNG component; potent GHG with GWP-100 of 28 to 30 under AR6.
Methane Carrier X20. LNG Operations and Custody Transfer: Generic term for LNG carrier.
Methane Compressed X75. IMDG Code, Classes, Packing and Segregation: UN 1971, Class 2.1 flammable gas.
Methane Hydrate D2. Hydrography, tides, waves, bathymetry and marine geology: Ice-like solid containing methane in a water lattice, common on continental slopes.
Methane Inerting X28. Ship Recycling and End-of-Life: Use of inert gas to render cargo tanks safe in gas carrier recycling.
Methane Number X20. LNG Operations and Custody Transfer: Knock-resistance measure of fuel gas; LNG typically above 70.
Methane number (MN) X149. Marine Fuels, Bunkering, and Alternative Fuels: A metric for the knock resistance of gaseous fuels, broadly analogous to octane number, with LNG values typically 70 to 90.
Methane Princess X134. LNG and LPG Carrier Operators and Containment Systems: First commercial LNG carrier of 27,400 m3 delivered 1964 by Vickers-Armstrong for Conch International Methane.
Methane Refrigerated Liquid X75. IMDG Code, Classes, Packing and Segregation: UN 1972, see LNG entry.
Methane Slip D6. Decarbonization, emissions and alternative fuels: Unburned methane emissions from dual-fuel LNG engines.
Methane Slip (Reg 13 Annex VI) X171. MARPOL 73/78: Annex-by-Annex Detailed Glossary: Unburned methane emitted from dual-fuel and gas engines, not currently capped by Annex VI but addressed under SEEMP and CII operational measures.
Methanex X111. Methanol, Ammonia and Alternative Marine Fuels: Vancouver-based methanol producer and a founding member of the Methanol Institute, owner of methanol-fueled tonnage through Waterfront Shipping.
Methanex Marine X111. Methanol, Ammonia and Alternative Marine Fuels: Marine arm associated with Methanex coordinating methanol-fueled tanker operations and bunker initiatives.
Methanex Spill Response X60. Marine Salvage and Wreck Removal: Industry response framework relevant to methanol cargo salvage planning.
Methanex Waterfront X72. Bunkering Hubs and Bunker Suppliers: Methanex Corporation marine logistics operation supplying methanol bunker grade product to its own and chartered tankers.
Methanol X1. Cargo Science, Commodities and Cargo Care: IBC Category Y; flammable; common chemical tanker cargo.
Methanol (CH3OH) X34. Decarbonization, Alternative Fuels and Carbon Pricing: Liquid fuel with low flashpoint; gray, blue, bio, and e-pathways exist.
Methanol (polar fuel) X27. Polar Code, Ice Navigation and Polar Operations: Alternative low-carbon fuel under consideration for polar service.
Methanol Auto-Ignition Temperature X111. Methanol, Ammonia and Alternative Marine Fuels: Approximately 470 degrees Celsius for methanol.
Methanol Barge X103. US Inland Waterway Towing and Barge: An inland tank barge carrying methanol.
Methanol bunker X47. Marine Fuel Quality and ISO 8217: Methanol (CH3OH) supplied as marine fuel for dual-fuel engines, with quality covered by IMPCA reference and informed by ISO TC 28 work in progress.
Methanol Bunker Vessel X111. Methanol, Ammonia and Alternative Marine Fuels: Dedicated ship configured for ship-to-ship transfer of methanol as marine fuel, such as the Mari Tellus.
Methanol Bunkering D6. Decarbonization, emissions and alternative fuels: Supply of methanol as marine fuel.
Methanol Density X111. Methanol, Ammonia and Alternative Marine Fuels: 791 kg/m3 at typical storage conditions, about half the density of HFO at 1,000 kg/m3.
Methanol Dual-fuel X69. EGCS Scrubbers, SCR and Marine Air Emissions: Engine technology offering an alternative low-SOx compliance pathway.
Methanol dual-fuel (X-DF-M) X90. Marine Engine Specific Model Enumeration: WinGD low-speed two-stroke methanol dual-fuel platform offered on the X62DF-M and X92DF-M.
Methanol Flash Point X111. Methanol, Ammonia and Alternative Marine Fuels: 11 degrees Celsius, classifying methanol as a low-flashpoint fuel under the IGF Code.
Methanol Fuel D6. Decarbonization, emissions and alternative fuels: Methanol (CH3OH) used as a marine fuel with potential for renewable production.
Methanol Fuel System Decommissioning X50. Ship Recycling, Demolition and Hong Kong Convention: The procedure for purging methanol fuel systems on dual-fuel ships before recycling.
Methanol IMPCA grade A X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Reference specification used for marine methanol bunkering.
Methanol Injection X14. Offshore Oil and Gas Marine Operations: Alternative hydrate inhibitor.
Methanol Institute X34. Decarbonization, Alternative Fuels and Carbon Pricing: Industry body publishing safe handling and bunkering guidance for methanol.
Methanol LHV X111. Methanol, Ammonia and Alternative Marine Fuels: Lower heating value of 19.9 MJ/kg for methanol, roughly half that of HFO.
Methanol Tank Requirement X111. Methanol, Ammonia and Alternative Marine Fuels: Approximately twice the volume of HFO is required to store an equivalent amount of energy as methanol.
Methanol Toxicity X111. Methanol, Ammonia and Alternative Marine Fuels: Toxic to humans by ingestion, inhalation, and skin absorption, but biodegradable in the marine environment.
Methanol Tug X30. Tug Operations and Harbour Towage: Tug burning methanol fuel; Boluda announced such a tug for 2024.
Methanol-fueled feeder (Stena Germanica) B5. Ship Types and Individual Vessels: First methanol-converted ferry.
Methanol-ready X124. Dredging Industry and Reclamation Contractors: Newbuild specification for dual-fuel dredgers, adopted by Van Oord Vox Apolonia and DEME River Thames.
Methocel X42. Offshore Wind Installation and Cable Lay: Reference grout admixture brand.
Method 1 (Fender Selection) X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: PIANC 2002 WG33 deterministic approach using design ship parameters and factors to size fenders.
Method 1, VGM X76. Stevedoring, Lashing and Cargo Securing: Weighing of the entire packed container at a certified scale.
Method 2 (Fender Selection) X173. Mooring, Anchoring, OCIMF MEG4, and Equipment Numeral: PIANC 2002 WG33 probabilistic approach using statistical distributions of berthing parameters.
Method 2, VGM X76. Stevedoring, Lashing and Cargo Securing: Adding the weights of all contents, packaging, dunnage, and tare to obtain the VGM.
Method Statement Heavy Lift X104. Project Cargo Forwarders and Heavy Transport: Step-by-step written procedure for a planned lift or transport.
Methodology for Marine Spatial Planning (UNESCO IOC) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Manual outlining a stepwise framework for developing marine spatial plans.
Methyl Acetate X75. IMDG Code, Classes, Packing and Segregation: UN 1231, Class 3 flammable liquid Packing Group II.
Methyl Acrylate Inhibited X93. IBC Code and Chemical Tanker Operations: Acrylate monomer assigned UN 1919, Type 2 ship, Category Y, requiring inhibitor and valid Inhibitor Certificate.
Methyl Alcohol X75. IMDG Code, Classes, Packing and Segregation: Synonym for methanol, see UN 1230.
Methyl Bromide X1. Cargo Science, Commodities and Cargo Care: Fumigant under IMSBC and IMO MSC.1/Circ.1264.
Methyl Chloride X75. IMDG Code, Classes, Packing and Segregation: UN 1063, Class 2.1 flammable liquefied gas.
Methyl Ethyl Ketone X75. IMDG Code, Classes, Packing and Segregation: MEK, UN 1193, Class 3 flammable liquid Packing Group II.
Methyl Isocyanate X75. IMDG Code, Classes, Packing and Segregation: UN 2480, Class 6.1 with Class 3 subsidiary risk, Packing Group I.
Methyl Methacrylate Monomer X93. IBC Code and Chemical Tanker Operations: Acrylate monomer assigned UN 1247, Type 2 ship, Category Y, inhibited with MEHQ at shipper-stated concentration.
Methyl Methacrylate Monomer Stabilized X75. IMDG Code, Classes, Packing and Segregation: UN 1247, Class 3 flammable liquid Packing Group II.
Methyl Tert Butyl Ether X75. IMDG Code, Classes, Packing and Segregation: MTBE, UN 2398, Class 3 Packing Group II.
Methylal X93. IBC Code and Chemical Tanker Operations: Acetal CH2(OCH3)2 assigned UN 1234, carried under the IBC Code subject to Chapter 15 requirements.
Methylamine Anhydrous X75. IMDG Code, Classes, Packing and Segregation: UN 1061, Class 2.1 flammable gas.
Methylamine Aqueous Solution X75. IMDG Code, Classes, Packing and Segregation: UN 1235, Class 3 with Class 8 subsidiary risk.
Methylmercury D3. Marine environmental science, pollution and conservation: Organic mercury form that biomagnifies in marine food webs.
MetOcean X42. Offshore Wind Installation and Cable Lay: Combined meteorological and oceanographic data set underlying offshore wind structural and operational design.
Metocean data X59. Offshore Wind O&M, CTVs and SOVs: Combined meteorological and oceanographic dataset used in O&M planning, including wind, wave, current, and visibility statistics.
Metoclopramide X36. Shipboard Medical, Telemedicine and Seafarer Health: Antiemetic in IMGS Annex IV.
MetOp Satellites D5. Coastal processes, sea-level, cryosphere and ocean observation science: EUMETSAT polar-orbiting satellites carrying ASCAT and others.
Metric Tonne Pricing X50. Ship Recycling, Demolition and Hong Kong Convention: The metric basis for steel scrap and equipment salvage pricing, distinct from the LDT pricing of the ship as a whole.
Metronidazole X36. Shipboard Medical, Telemedicine and Seafarer Health: Antibiotic active against anaerobes and protozoa.
METSTRADE Awards (DAME) X119. Maritime Conferences, Trade Shows and Awards: Design Awards METSTRADE since 1991.
Mewis Duct X38. Propellers, Stern Gear and Shaft Lines: Pre-swirl wake-equalizing duct developed by Friedrich Mewis and Becker Marine Systems, widely retrofitted on tankers and bulkers.
MEWS X102. Seafarer Welfare and Maritime Charities: Maritime Education and Welfare Society, a generic naming pattern adopted by some national welfare bodies.
Mexican Avocado Reefer X136. Reefer Vessels and Cool Chain Operators: Year-round reefer container trade from Manzanillo and Lazaro Cardenas to the United States and Asia, dominated by Michoacan producers.
Mexican Hydrographic Service X73. Marine Hydrography, Charting and ENC: Operated by the Secretaria de Marina (SEMAR) of Mexico.
Mexican Navy SAR X80. Maritime Search and Rescue Coordination: Secretaria de Marina of Mexico coordinating maritime SAR in Mexican waters.
Mexican Pacific Salvage X141. Marine Salvage Industry and Wreck Removal Contractors: SMIT's Manzanillo-based Pacific Mexico response station.
Mexico (national tall ship policy) X128. Sail Training Ships and Tall Ship Associations: Mexican Navy operates Cuauhtemoc as the national sail training barque and primary international ambassador ship.
Mexico Heroica Escuela Naval Militar X121. Maritime Education, Academies and Universities: Veracruz, naval officer college.
Mexico Plant Closure X83. ISO Container Manufacturing and Leasing: 2024 closure of the MCI San Antonio dry container plant, leaving CIMC and CXIC as the dominant builders.
Mexico PSC X66. Port State Control and Regional MOUs: Member of Acuerdo de Vina del Mar.
Mexilhao Cooperativa X126. Marine Oil Spill Response and OPRC Regimes: Brazilian sandy beach mussel monitoring program.
Mexisa X71. Shipbrokers and Brokerage Firms: Mexico City-based shipbroker active in bulkers, tankers, and project cargo.
Meyer Turku X58. Shipbuilding Yards and Construction: Finnish shipbuilder at Turku, the Meyer group's cruise yard for large luxury cruise ships.
Meyer Werft X29. Ship Sale and Purchase, Management Contracts and Valuation: German shipbuilder at Papenburg, cruise specialist.
Meyer Werft Papenburg X113. Drydock and Ship Repair Yards: German Meyer Group cruise ship newbuild yard on the Ems River with limited repair work.
MeyGen X57. Ocean Energy Beyond Wind: Tidal stream array in the Inner Sound of the Pentland Firth, Scotland, originally led by Atlantis Resources and now operated by SAE Renewables.
Mezzanine Loan X49. Ship Finance, Leasing and Maritime Capital Markets: Subordinated debt ranking between senior bank loans and equity.
MF DSC X23. AIS, GMDSS, IALA Buoyage and Aids to Navigation: Medium Frequency Digital Selective Calling on 2187.5 kHz.
MF Hydra X111. Methanol, Ammonia and Alternative Marine Fuels: Norled hydrogen PEM fuel cell ferry operating in Norway from 2023 as the first commercial hydrogen-fueled ferry.
MF/HF DSC Distress Watch X95. GMDSS Equipment and Survival Craft Communications: Continuous automatic monitoring of MF and HF DSC distress frequencies required of GMDSS equipped vessels operating in sea areas A2, A3, and A4.
MF/HF radio X16. Nautical Science, Navigation and COLREGs: Medium and high-frequency radio used in GMDSS Sea Areas A2 and A3.
MFA X21. STCW Certificates, Crewing and Seafarer Welfare: Medical First Aid, STCW VI/4 paragraph 1.
MFA Multi-Factor Authentication X25. Maritime Cybersecurity, OT and IT: Authentication using two or more independent factors.
MFAG X36. Shipboard Medical, Telemedicine and Seafarer Health: Medical First Aid Guide for Use in Accidents Involving Dangerous Goods; IMO publication supplementing IMDG Code.
MFAG 2024 edition X36. Shipboard Medical, Telemedicine and Seafarer Health: Current edition of the Medical First Aid Guide published by IMO.
MFAG Table Number X36. Shipboard Medical, Telemedicine and Seafarer Health: Numerical reference (e.g., 700, 725, 740) linking each UN cargo entry in IMDG Code to a treatment schedule.
MFAG Tables X172. IMDG Code: Classes, Divisions, Segregation, and Key UN Numbers: Numbered tables 100s through 700s covering chemical agent treatments, antidotes, observation periods, and contact information.
MFB X102. Seafarer Welfare and Maritime Charities: Merchant's Federation Board reference used historically for maritime workers' welfare federations.
MFB Solicitors X51. Maritime Arbitration, Law and BIMCO Clauses: A London boutique shipping law firm with an admiralty and casualty practice.
MFM Bunker Procedure X115. Marine Bunker and Cargo Surveying: Mass flow meter bunker delivery procedure issued by MPA Singapore as standard SS 660 and implemented since 2017.
MFM bunkering X2. Marine Bunker Fuels, Lubricants and Bunkering Operations: Bunker delivery using Coriolis mass flow meters under Singapore TR48 procedures.
MFM Singapore X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: The MPA-enforced mass flow meter delivery regime under Singapore Standard SS 648:2019 for distillates and SS 660:2020 for biofuel blends.
MFM Vendor Approval X72. Bunkering Hubs and Bunker Suppliers: Approval procedure under MPA Singapore listing acceptable Coriolis mass flow meter brands and models for bunker custody transfer.
MFN X6. Container, Intermodal and Trade Codes: Most Favoured Nation tariff rate.
MFR X11. Naval Vessels, Warship Systems and Naval Architecture: Multi-Function Radar, generic Western term.
MGC X56. LNG/LPG Carriers and IGC Code: Mid-size Gas Carrier of approximately 22,000 to 40,000 cubic meters, common in LPG and ammonia trades.
MGN 280 X125. Superyacht Industry, Builders and Brokers: MCA Marine Guidance Note 280, the original Large Yacht Code now superseded.
MGN 411 X125. Superyacht Industry, Builders and Brokers: MCA helicopter landing area on yachts guidance.
MGN 420 X156. Superyacht Industry, Builders, and Yacht Charter Market: UK Marine Guidance Note on the Code of Practice for safe operation of small commercial sailing and motor vessels of up to 24 meters.
MGN 458 X116. Global Bunker Anchorages, Hubs and Supply Infrastructure: UK Marine Guidance Note covering fuel oil quality and bunker delivery documentation.
MGN 471 X125. Superyacht Industry, Builders and Brokers: MCA Marine Guidance Note on the Maritime Labour Convention application to yachts.
MGO X19. Engine Room Watchkeeping and UMS Operations: Marine gas oil, distillate fuel per ISO 8217 DMA.
MGO (Marine Gas Oil) D6. Decarbonization, emissions and alternative fuels: Distillate marine fuel meeting ISO 8217 grades DMA/DMZ.
MGPS X100. Marine Cathodic Protection and Anodes: Marine Growth Prevention System, a copper-aluminum electrochemical package fitted in sea chests and cooling lines to suppress fouling and corrosion.
MGX X147. Ship Recycling, Hong Kong Convention, and Recycling Yards: Cash buyer brand operating in the South Asian ship recycling market.
MH-53E Sea Dragon X77. Naval Mine Warfare and Mine Countermeasures: A Sikorsky heavy-lift helicopter operated by the US Navy in the airborne mine countermeasures role with towed sweep and sonar systems.
MH-60 Jayhawk X80. Maritime Search and Rescue Coordination: Sikorsky medium range SAR helicopter operated by the US Coast Guard.
MH-60R X62. Naval Warships and Combat Systems: Sikorsky multi-mission maritime helicopter operated by the US Navy and allied services.
MH-60R Seahawk X106. Naval Surface Combatants: Sikorsky multi-mission anti-submarine warfare helicopter, primary US Navy ASW rotorcraft.
MH-60S X62. Naval Warships and Combat Systems: Sikorsky utility variant operated for vertical replenishment, search and rescue, and mine countermeasures.
MH-60S Knighthawk X77. Naval Mine Warfare and Mine Countermeasures: A Sikorsky helicopter that hosts the ALMDS, AMNS, and OASIS sensor systems in the US Navy AMCM role.
MH-60T X130. National Coast Guards and Cutter Fleets: USCG Jayhawk medium-range helicopter.
MH-60T Jayhawk X31. Helicopter Operations on Ships: US Coast Guard medium-range SAR helicopter, derivative of Sikorsky S-70.
MH-65 Dolphin X31. Helicopter Operations on Ships: US Coast Guard short-range SAR helicopter, derivative of Eurocopter AS365.
MH-65E X130. National Coast Guards and Cutter Fleets: Latest Dolphin variant featuring digital glass cockpit upgrade in service since 2017.
MHC X15. Ports, Terminals and Stevedoring: see harbour mobile crane.
MHC (Mobile Harbor Crane) X94. Port Machinery and Quay Equipment Makers: Wheeled rubber-tired harbor crane used at multipurpose berths for containers, bulk, and project cargo.
MHF X65. ROVs, AUVs, USVs and Marine Robotics: Oceaneering Multi-purpose Heavy Fleet work-class ROV.
MHI Ammonia Cracker X140. Ammonia as Marine Fuel and Hydrogen Shipping: Mitsubishi Heavy Industries pilot at Yokohama producing 1 tpd H2 from NH3 feedstock.
MHI Mihara X62. Naval Warships and Combat Systems: Mitsubishi Heavy Industries facility involved in machinery and systems for naval programs.
MHI Power X59. Offshore Wind O&M, CTVs and SOVs: Mitsubishi Heavy Industries power business providing service support for legacy MHI Vestas turbines.
MHI Vestas X42. Offshore Wind Installation and Cable Lay: Former joint venture between Mitsubishi Heavy Industries and Vestas, now fully integrated into Vestas Offshore Wind.
Mi-Jack X46. Container Terminal Operations: A US-headquartered manufacturer of rubber-tyred gantries widely used in North American intermodal rail terminals.
Mi-Jack Products X94. Port Machinery and Quay Equipment Makers: US manufacturer of rubber-tired gantry cranes for intermodal rail terminals based in Hazel Crest, Illinois.
Mi-Jack twistlock X76. Stevedoring, Lashing and Cargo Securing: Twistlock pattern associated with Mi-Jack Products of Illinois, a maker of intermodal cranes and related gear.
MIA (Marine Industry Audit) X150. Tanker Vetting: OCIMF SIRE, CDI, RightShip, and TMSA: A class-society or independent audit format used to verify operator management system maturity beyond TMSA.
MIA Arbitration X114. Maritime Arbitration and Shipping Law Firms: Maritime Industry Authority arbitration in the Philippines.
Miami X24. Cruise, Passenger Ship and Ferry Operations: Largest cruise port in the world by passenger throughput, PortMiami.
Miami International (MIA) X156. Superyacht Industry, Builders, and Yacht Charter Market: Major US air gateway adjacent to large yacht marinas at Miami Beach Marina, Island Gardens Deep Harbour, and Yacht Haven Grande.
Miami International Boat Show X35. Yacht and Superyacht Industry: Annual February boat show in Miami.
Miami Pilots X159. Marine Pilotage, Pilot Districts, and Pilots' Associations: Biscayne Bay Pilots Association serving Port Miami and the Government Cut entrance under Florida state commission.
Miami Yacht Show X125. Superyacht Industry, Builders and Brokers: Held each February alongside the Discover Boating Miami International Boat Show.
MIArb X114. Maritime Arbitration and Shipping Law Firms: Member of the Chartered Institute of Arbitrators, qualifying many maritime arbitrators.
MIArbS X114. Maritime Arbitration and Shipping Law Firms: Maritime Industry Arbitration Society referenced in literature.
MIC X45. Marine Paints, Coatings and Antifouling: Microbially Influenced Corrosion, attacking steel in ballast and cargo tanks where coatings have failed.
MIC (Maintenance Information Centre) X37. Marine Spatial Planning, Subsea Cables and Submarine Pipelines: Coordination point for regional cable maintenance consortia such as the Atlantic Cable Maintenance and Repair Agreement.
MICA-VL X11. Naval Vessels, Warship Systems and Naval Architecture: MBDA vertical launch surface-to-air missile.
Micaceous iron oxide X165. Marine Coatings, Antifouling, and Hull Husbandry: Lamellar Fe2O3 pigment used in epoxy and polyurethane intermediate coats for ultraviolet and corrosion resistance.
Michael Monsoor (USS) DDG-1001 X106. Naval Surface Combatants: Second Zumwalt-class destroyer, commissioned 2019.
Michell pad X38. Propellers, Stern Gear and Shaft Lines: Tilting-pad thrust bearing element invented by Anthony Michell, the principal pad geometry in marine thrust blocks.
Michell's integral B1. Naval Architecture: Linear theory of wave-making resistance for thin ships.