M (Mike)

I am Stopped ; I have a doctor on board

M

Meter or Measure

M/T (MT)

Motor Tanker

M/V (MV)

Motor Vessel

Management Company

A company (often third party) assuming responsibility for the operation and administration of a vessel, i.e. crewing, technical operations and maintenance.

Manifest

List of all cargo on board (Cargo Manifest). Term used also for passenger list on cruise vessels, passenger ferries, etc

MARAD

Maritime Administration (USA) - authority under the US department for Trade. Handles subsidies etc. to American shipyards and shipping companies.

Marine Riser

Large diametre casing, consisting of many pipe sections coupled together, normally with floating elements on the outside. Installed between the Marine BOP and the drilling rig.

MARINTEK

Norsk Marinteknisk Forskningsinstitutt A/S (Trondheim) - Norwegian maritime research institution.

Maritime inquiry

An inquiry conducted by maritime and legal authorities following an accident or near-accident at sea, resulting in a maritime declaration.The purpose of such hearings is to uncover the cause of accident or mishap. The inquiry is primarily conducted between members of the crew, but may also involve bystanders who may shed light on the events. The maritime inquiry serves three purposes according to Norwegian maritime law: -Enables maritime authorities to consider amending or improving existing rules and regulations in order to prevent similar accidents. -Determines whether or not someone should be prosecuted for criminal neglect or breach of rules. -Uncovers liabilities in connection with insurance claims.

MARPOL

The International Convention for Prevention of Pollution from Ships (London) - 1973 (as modified by the Protocol of 1978)

MAX

Maximum

MB

Molded Breath - the breath of the hull at the widest part, measured between the outer surfaces of the frames.

MBT

Motor Blocks Turning

MCT

Marine Custody Transfer

MCTM

Marine Custody Transfer Measurement - the measurement activity involving a marine custody transfer (MCT)

MD

Mean Draft - the average of the drafts measured at the bow and the stern. ; Molded Depth - the depth measured between the top of the keel, or lower surface of the frame at the center line, and the top of the upper deck beam at the gunwale.

MDO

Marine Diesel Oil

MED

Mediterranean Sea

MED

Mediterranean Sea

MEIF

Mandatory Excess Insurance Facility - Norwegian-Swedish-Greek proposal to solve the COFR-question.

MEP

Marine Environmental Protection (U.S.)

MEPC

Maritime Environment Protection Committee (IMO, London)

Merger

The joining of two or more (shipowning) companies.Merger - the joining of two or more (shipowning) companies.

MERCOSUR

Regional political trade organisation comprising Brazil, Argentina, Paraguay and Uruguay.

MERPAC

Merchant Marine Personnel Advisory Committee

MF

Meter Factor

MFO

Marine Fuel Oil

MHWN

Mean High Water Neaps

MHWS

Mean High Water Springs

MIN

Minimum

MIN/MAX

Minimum/Maximum - refers to fixed cargo size - e.g.: "10,000 tonnes min./max.".

MIO

Marine Inspections Office

MITS

Maritim information technology.

MMC

Merchant Mariners’ Credentials

MMPD

Maximum Most Probable Discharge (U.S., related to oil spill)

MMS

Minerals Management Service (U.S.)

MODU

Mobile Offshore Drilling Unit

MOL

More Or Less - refers to a cargo size option - say, "10,000 tonnes, 5 per cent more or less" - usually clarifying whose option to select the final cargo size

MOLCHOP

More Or Less Charterer's Option

MOLCO

More Or Less Charterer's Option

MOLOO

More or less owner's option - a margin which the shipowner has for the amount of cargo a vessel should carry. I.e. "30,000 tons 5 per cent moloo" means that the vessel can load between 28,500 and 31,500 tons.

Monkey Board

Platform in the drilling tower where the Derrick Man is handling the drill stem.

Monopod

Type of rig where the foundation consists of a cylindric stem from the seabed to the surface.

Motion Compensator

Equalizes level variations during drilling from floating rigs or cranes.

MOU

Memorandum Of Understanding

Mousehole

Hole in the Derrick platform where the next section of drill stem is placed awaiting being coupled to the drill stem.

MPA

Marine Preservation Association (supports MSRC)

MPMS

Manual of Petroleum Measurement Standards (API)

MPSV

Multipurpose Service Vessel

MR

Mates Receipt

MRR

Maritime Regulatory Reform

MS

Motor Ship

MSC

Maritime Safety Committee (IMO, London)

MSDS

Material Safety Data Sheet

MSIS

Marine Safety Information System

MSO

Marine Safety Office (USCG)

MSRC

Marine Spill Response Corp., The. (OSRO)

MT (M/T)

Metric Tonne - a tonne of 2,204 pounds or 1,000 kilograms, equivalent to 0.9842 long tons.

MTC

Maritime Transport Committee (OECD)

Mud Line

The sea bed, the borderline between the water and solid sediments.

Mud Pit

Tank containing the drill mud.

Mud Weight

The weight of the drill mud in pounds per gallon. Light mud: 8 pounds/gln; heavy mud: 14 pounds/gln.

MUI

Maritime Union of Indian Officers

Multipurpose ship

General cargo ship which can also carry containers.