m_1mm

m	Metre
M/T	Metric tons (2,250 lbs.). 2. abbreviation for empty
M/V	merchant vessel
Mafi Trailer	German brand name of a roll trailer used for RoRo purposes.
Magnetic north	The direction to which a compass points. Magnetic north differs from true north because the magnetic fields of the planet are not exactly in line with the north and south poles. Observed differences between magnetic and true north is known as magnetic variation.
MAIB	Marine Accident Investigation Branch
Maiden Trip	First voyage of a vessel or aircraft after delivery from new-building to her owner(s).
MAIIF	Marine Accident Investigators' International Forum
Main-	Prefix refering a component of the mainmast... maintop, mainchains, main backstay, etc.
Main Carriage	The primary stage in the movement of cargo from the point of origin to the intended final destination.
Main Deck	The uppermost complete deck.
main deck	The principal deck of a ship. In ships with multiple decks, the deck beneath the spar deck.
main mast	The tallest (possibly only) mast on a boat.
main sheet	The line used to control the mainsail.
main topsail	A topsail on the main mast.
mainchains	Heavy steel plates fastened to a ship's sides that anchor the rigging for the mainmast.
Main-line Operator	A carrier employing vessel(s) in the main or principal routes in a trade but not participating within a consortium.
mainmast	The principal mast of a sailing ship.
Mainmast	Centermost, and generally highest, mast.
mainmast	Aboard the three-masted Concordia, the middle of the three
Mainsail	The sail set on the mainmast.
Mainsail	The main sail that is suspended from the main mast.
Mainsheet	the line that controls the boom
Maintenance Chain	A sequence of events in a goods flow which preserves and/or restores the value of a specific good. This may include repairs.
Make fast	To secure a line
Make way	Moving through the water.
Manifest	Document, which lists the specifications of goods, loaded in a means of transport or equipment for transportation purposes.
MANNING SCALES	The minimum number of officers and crew members that can be engaged on a ship to be considered as sufficient hands with practical ability to meet every possible eventuality at sea.
Manufacturers Plate	A plate indicating the name and address of the container manufacturer and particulars of the container.
Manufacturing Process	The producing of goods or wares by manual labour or machinery, often on a large scale and with division of labour.
Manufacturing Resource Planning	A method for the effective planning of a manufacturing company, being a direct out-growth and extension of MRP-I.
Marconi	An alternative name for bermudan
Marina	A place where boats can find fuel, water and other services. Marinas also contain slips where boats can stay for a period of time.
Marina:	A normally enclosed area safe from flooding or inclement weather.
Marine Insurance Policy	An insurance policy protecting the insured against loss or damage to his goods occurred during ocean transport.
Mariner:	In general, a person employed in a sea-going vessel. In some cases, applied to a seaman who works on deck.
Marisat	maritime satellite system
MARITIME ADMINISTRATION (MARAD )	Oversees subsidy programs to the United States Merchant Marine. Assigns routes to subsidized liners.
MARITIME LIEN	A claim which attaches to the res, i.e., the ship,. freight, or cargo.
MARITIME SUBSIDY BOARD (MSB)	A branch within the Maritime Administration which deals with Operating Differential Subsidy and Construction Differential Subsidy.
Mark	An object used as a reference point while navigating
Market Analysis	Systematic investigation of the growth and the composition of a market.
Marketing	The process of organising and directing all the company activities which relate to determining the market demand and converting the customers buying power into an effective demand for a service and bringing that service to the customer.
Marline spike	A pointed tapering iron or wooden spike used for opening strands of rope
Marlinespike	A pointed tool used to separate the strands of a rope or wire.
MARLINSPIKE	A tool for opening the strands of a rope while splicing.
MARLINSPIKE	A tool for opening the strands of a rope while splicing.
MARPOL 73/78	The International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978.
Marpol 73/78	International Convention for the Prevention of Pollution from Ships,IMO
Marry the Gunner's Daughter:	Old Navy nickname for a flogging, particularly when across a gun.
Mast	Any vertical pole on the boat that sails are attached to. If a boat has more than one mast, they can be identified by name.
Mast step	A recess or fitting in a vessel's keel into which the base of the mast is positioned
Master	The person in charge of a vessel. The captain.
master	The captain of a merchant ship.
Master Data	The set of data that is needed to establish sufficient reference material to support the maximum use of pre-coded, pre-agreed information enabling more efficient transaction messaging.
Master Production Schedule	A realistic, detailed, manufacturing plan for which all possible demands upon the manufacturing facilities (such as available personnel, working hours, (management) policy and goals) have been considered and are visualised. The MPS is a statement of what
Master's Mates	Warrant officers assisting the master.
Masthead	The top of a mast.
MASTHEAD LIGHT	A white light positioned over the fore and aft centerline of the vessel.
Masthead sloop	A sloop whose headstay reaches the mast head
Masts	Vertical spars that carry the yards. From the bow, they are the Foremast, Mainmast, and Mizzenmast. Each was composed of a lower mast, a topmast, and a t'gallant mast
mate	A deck officer ranking below the master on a merchant ship.
Material Requirements Planning	An inventory and purchasing planning system that integrates product components, lead times and deadlines.
Materials Handling	The activities of loading, unloading, placing and manipulating material and of in-process movement.
Materials Management	The planning and control of the activities related to the materials flow from the suppliers up to the end of the conversion/production process.
Mate's Receipt	A document signed by the chief officer of a vessel acknowledging the receipt of a certain consignment on board of that vessel. On this document, remarks can be made as to the order and condition of the consignment.
Mayday	An internationally recognized distress signal used on a radio to indicate a life-threatening situation. Mayday calls have priority over any other radio transmission and should be used only if there is an immediate threat to life or vessel. More urgent than a pan pan or securite call.
MAYDAY	Spoken international distress signal, repeated three times
Mb	megabyte
MCA	Marine Coastguard Agency
MCC	mission control centre
MDO	marine deisel oil
Meander:	A bend in the middle and lower course of a River.
Means of Transport	Type of vehicle used for the transport of goods (e.g. aircraft, barge, truck, vessel or train).
Measurement Ton	A ton of one cubic metre water.
Mechanics Lien	The legal enforceable claim, which a person who has performed work or provided materials is, permitted to make against title to the property or as a preferential person in the event the estate or business is liquidated.
MEDEVAC	medical evacuation Evacuation of a person for medical reasons
Medical First Aid Guide	Instructions to be consulted in case of accidents involving dangerous goods.
MEDICO	Medical advice usually by radio.
MEO	medium earth orbit (satellite configuration)
MEPC	Marine Environment Protection Committee, IMO
Mercator projection	A form of map
Merchant	For cargo carried under the terms and conditions of the Carrier's Bill of Lading and of a tariff, it means any trader or persons (e.g. Shipper, Consignee) and including anyone acting on their behalf, owning or entitled to possession of the goods.
Merchant Haulage	Inland transport of cargo in containers arranged by the Merchant.
Meridian	A longitude line. Meridians are imaginary circles that run through both poles.
MERSAR	Merchant Ship Search and Rescue Manual
Mess	Men grouped for feeding purposes. The "Officer's Mess" was the wardroom. Groups of eight or so seamen were grouped as a "mess," and one designated the "mess cook." At mealtimes, the mess cook would fetch the food for his mess.
Messenger	A small line used to pull a heavier line or cable. The messenger line is usually easier to throw, lead through holes or otherwise manipulate than the line that it will be used to pull.
Meta-centric Height	The distance between the centre of gravity of a vessel and a fictitious point. If the metra- centric height is zero or negative, the vessel will heel or capsize.
Meter class	a measurement rule for for rating boats
MF	medium frequency MHz megahertz
MFN	Most Favored Nation.
MGN	Marine Guidance Note
MGO	Marine Gas Oil
MIB	Marine Index Bureau.
MICROBRIDGE	A system of through rates and service offered by a carrier for cargo shipments from any inland U.S. location to a port, by sea to a foreign port and finally overland to foreign inland destination.
Middle Ground:	Shoal area between two navigational channels.
Midship	In the middle portion of the boat
Midshipman	The lowest rank of officer aboard ship. Service as midshipman for a number of years was required before applying for a commission.
Millibar	A unit of barometric pressure
MINILAND BRIDGE	The process of taking inland cargo bound for export to the coast by rail and loading it directly to the ship.
Minimum Charge	The lowest amount which applies to the transport of a consignment, irrespective of weight or volume.
Minimum Inventory	The planned minimum allowable inventory for an independent demand item.
Minor Unit	Unit of recorded value (i.e. as recorded by banks) which is a division of the respective unit of currency.
MIRAID	Maritime Institute for Research and Industrial Development.
MIS	management information system
Mixed Consignment	A consignment of different commodities, articles or goods, packed or tied together or contained in separate packages.
MIXED SHIPMENT	A shipment consisting of more than one commodity, articles described under more than one class or commodity rate item in a tariff.
Mizzen	the shorter mast behind the main mast on a ketch or yawl
Mizzen-	Prefix refering a component of the mizzenmast... mizzenchains, mizzen backstay, etc.
mizzen mast	A smaller aft mast on a ketch or yawl rigged boat.
mizzen sail	The sail on the aft mast of a ketch or yawl rigged sailboat.
mizzen staysail	A small sail that is sometimes placed forward of the mizzen mast.
Mizzenmast	Aftmost mast, often the smallest of the three.
MNI	Member of The Nautical Institute
Mode of Transport	Method of transport used for the conveyance of goods, (e.g. by rail, by road, by sea).
Model	A representation of a process or system that attempts to relate the most important variables in the system in such a way that analysis of the model leads to insights into the system.
MODU	Mobile Offshore Drilling Unit.
Module	A separate and distinct unit of hardware or software that may be used as a component in a system.
Monohull	A boat that has only one hull, as opposed to multihull boats such as catamarans or trimarans.
Moor:	To secure a ship in position by two or more anchors and cables. 2. To attach a vessel to a buoy, or buoys. 3. To secure a vessel by attaching ropes to positions ashore.
Mooring	Any arrangement of anchors and rodes that are permanently set
Mooring	A place where a boat can be moored. Usually a buoy marks the location of a firmly set anchor.
mooring bitt	A strong pair of iron, steel or wooden posts on a ship's deck, around which ropes or cables are wound and held fast.
mooring buoy	A buoy marking the location of a mooring. Usually attached to an anchor by a small pendant.
MOORING LINE	A cable or line to tie up a ship.
Mooring line	A line used to secure a boat to an anchor, dock, or mooring.
Mooring pins:	Spikes that are driven into the bank to allow mooring were no mooring rings or bollard's are available.
MOP	mobile offshore production
Morse code	A code that uses dots and dashes to communicate by radio or signal lights.
Motor	1) An engine.2) The act of using an engine to move a boat.
motor sailer	A boat designed to use its motor for significant amounts of time and use the sails less often than a normal sailboat.
Motor:	The name given to a boat towing a 'Butty'.
MOU	memorandum of understanding (often refers to PSC)
Mount	1) An attachment point for another object.2) The act of putting an object on its mount.
Movement	The act or process of changing the position of an object and or people.
Movement Inventory	The inventory during a production process caused by the time required to move goods from one place to another.
MRCC	maritime rescue coordination centre
MSB	Maritime Subsidy Board.
MSC	Marine Safety Committee, IMO
MSI	maritime safety information
MSN	merchant shipping notice 'M- Notice',UK
MTC	Maritime Transport Committee, OECD
Multi Purpose Vessel	Vessel designed for the carriage of different types of cargo: general, bulk, heavy and/or containerised cargo.
Multihull	Any boat with more than one hull, such as a catamaran or trimaran.
Multimodal Transport	The carriage of goods (containers) by at least two different modes of transport.
Multimodal Transport Operator/Carrier	The person on whose behalf the transport document or any document evidencing a contract of multimodal carriage of goods is issued and who is responsible for the carriage of goods pursuant to the contract of carriage.
Multiple Sourcing	Selecting of and working with more than two equivalent suppliers for a certain product.
MULTIPURPOSE SHIP	Any ship capable of carrying different types of cargo which require different methods of handling. There are several types of ships falling into this category, for example, ships which can carry roll on/roll off cargo together with containers.
mushroom anchor	A type of anchor with a heavy, inverted mushroom-shaped head. Mushroom anchors are used to anchor in mud and other soft ground.