M.M
Mercantile marine.
M/T
Metric Ton (2204 lbs.).
M/V or M.V
Motor vessel.
Manifest
A list of the goods being transported by a carrier.
Marine Insurance
An insurance which will compensate the owner of goods transported overseas in the event of loss which cannot be legally recovered from the carrier.
Marking
Every article of foreign origin, or its container, imported into the United States shall be permanently marked in a conspicuous place in a manner which would indicate to the ultimate purchaser the English name of the country of origin of the article.
Measurement Ton
The measurement ton (also known as the cargo ton or freight ton) is a space measurement, usually 40 cubic feet or one cubic meter. The cargo is assessed a certain rate for every 40 cubic feet or 1 cubic meter it occupies.
Min. B/L
Minimum bill of lading.
MT
Empty.
MW
Minimum weight factor.