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Maritime Research Institute Netherlands
The Maritime Research Institute Netherlands (MARIN, Dutch: Maritiem Research Instituut Nederland) is an independent maritime research institute in Wageningen, the Netherlands, founded in 1932 as the Nederlandsch Scheepsbouwkundig Proefstation.
Maritime Safety Information
Maritime Safety Information (MSI) is the coordinated network of broadcasts carrying navigational and meteorological warnings, forecasts, and urgent safety messages that ships must be able to receive at sea under the GMDSS.
Maritime transport
Maritime transport, also called sea transport, is the movement of goods and passengers by sea in merchant ships, which carried 24.11 billion tonnes of freight in 2024, up 3.9 percent from 2023.
Maritime Union of Australia
The Maritime Union of Australia (MUA) is a trade union for waterside workers, seafarers, and port workers, formed in 1993 and amalgamated with the CFMEU in 2018.
Mark 48 torpedo
The Mark 48 (MK-48) is a submarine-launched heavyweight torpedo used by all classes of U.S. Navy submarines, first fielded in 1972 and also operated by Australia.
MARPOL 73/78
MARPOL 73/78, also known as the MARPOL Convention, is the International Convention for the Prevention of Pollution from Ships, adopted in 1973 and in force since 1983.
Mary Celeste
Mary Celeste was an American merchant brigantine found adrift and deserted off the Azores in December 1872 with all ten aboard, including Captain Briggs, his wife, and daughter, never accounted for.
Mary Rose
The Mary Rose was a warship built for Henry VIII between 1510 and 1511 that sank in the Solent in 1545 and was raised in 1982.
Massachusetts Maritime Academy
Massachusetts Maritime Academy (MMA) is a public maritime college in Buzzards Bay, Massachusetts. Founded in 1891, it trains merchant marine and military officers and sails the training ship Patriot State.
Mast (sailing)
A mast is the vertical spar on a sailing vessel that carries the sails, held upright by standing rigging and built from timber, aluminum, or carbon fiber.
Matson, Inc.
Matson, Inc., also known as Matson Lines, is an American ocean transportation and logistics company headquartered in Honolulu, Hawaii, founded in 1882 and serving Hawaii, Alaska, and Guam.
Mayflower
The Mayflower was an English merchant sailing ship that carried 102 passengers from Plymouth, England, to Cape Cod in 1620, producing Plymouth Colony and the Mayflower Compact.
Mazagon Dock Shipbuilders
Mazagon Dock Shipbuilders is an Indian state-owned shipyard in Mumbai that builds warships and submarines for the Indian Navy, tracing its origins to a dry dock built in 1774.
McClung-class landing ship medium
The McClung-class landing ship medium is a planned class of US Navy amphibious ships to move Marine littoral regiments in the Pacific, named for Maj. Megan McClung, killed in Iraq in 2006.
Medieval ships
Medieval ships, also called ships of the Middle Ages, were the wooden sailing and oared vessels of Europe, the Mediterranean, and Asia between roughly the fifth and fifteenth centuries.
Mediterranean Shipping Company
Mediterranean Shipping Company (MSC) is a Swiss container shipping and logistics company headquartered in Geneva, founded in 1970 by Captain Gianluigi Aponte with a single ship, and the world's largest container carrier.
Mein Schiff Relax
Mein Schiff Relax is a cruise ship operated by TUI Cruises, the first InTUItion-class vessel, delivered by Fincantieri in 2025 and the fleet's largest ship.
MEKO 200
The MEKO 200 is a family of modular frigates designed by Blohm+Voss of Hamburg, built from 1985 for Turkey, Portugal, Greece, Australia, and New Zealand.
MEKO A-200 DEU-class frigate
The MEKO A-200 DEU-class frigate is a planned class of anti-submarine frigates for the German Navy, built by ThyssenKrupp Marine Systems after the F126 program was canceled in 2026.
Merchant Marine Act of 1920
The Merchant Marine Act of 1920, also known as the Jones Act, is a US federal law reserving shipping between US ports for American-built, -owned, and -crewed vessels.
Merchant navy
The merchant navy, called the merchant marine in the United States, is a country's commercial shipping fleet, the ships and seafarers carrying cargo and passengers for trade rather than military activity.
Merchant Navy (United Kingdom)
The Merchant Navy, also called the British Merchant Service, is the United Kingdom's merchant shipping industry and its civilian seafarers, distinct from the Royal Navy.
Merchant ship
A merchant ship, also called a merchant vessel or merchantman, is a commercial vessel for goods or passengers that carries around 80% of international trade by volume.
Mercy-class hospital ship
The Mercy class is a pair of United States Navy hospital ships, USNS Mercy and USNS Comfort, converted from oil tankers into 1,000-bed floating hospitals in the 1980s.
Message in a bottle
A message in a bottle, also called a drift bottle, is a written message sealed in a bottle and set adrift in the hope a stranger will find it.
Messageries Maritimes
Messageries Maritimes was a French shipping company founded in Marseille in 1851 that carried mail, passengers, and cargo across the French colonial empire until its 1977 merger.
Meteor (hydrofoil)
The Meteor (Метеор) is a Soviet river passenger hydrofoil designed by Rostislav Alekseyev, built from 1961 into the 1990s, that carried over 100 passengers at 65 km/h.
Miami and Erie Canal
The Miami and Erie Canal was a canal in western Ohio, authorized in 1825 and completed in 1845, linking the Ohio River at Cincinnati with Lake Erie at Toledo.
Micky Arison (מיקי אריסון)
Micky Arison (מיקי אריסון), born in 1949, is an Israeli-born American business executive who was CEO of Carnival Corporation from 1979 to 2013 and owns the NBA's Miami HEAT.
Midget submarine
A midget submarine, also called a mini submarine, is a very small submarine carrying about four crew, used to attack enemy warships or for covert missions.