Manifest – A list of the goods being transported by a carrier.


Maquiladora – A foreign plant operating under an in-bond program whereby components may be shipped into Mexico duty-free for assembly and subsequent reexport. Maquiladora plants are also known as Twin Plants.


Maritime Administration (MARAD) – A U.S. government agency, while not actively involved in vessel operation, that administers laws for maintenance of merchant marine for the purposes of defense and commerce.


Mark – (See Consignee Mark, Markings, Port Marks)


Markings – The physical markings on a product indicating the country of origin where the article was produced.


Mate’s Receipt – Receipt of cargo by the vessel, signed by the mate (similar to a dock receipt).


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. Cargo is assessed a certain rate for every 40 cubic feet or one cubic meter it occupies.


MERCOSUR – A trade alliance between Argentina, Brazil, Paraguay and Uruguay, with Chile and Bolivia as associate members.


Min. B/L – Minimum Bill of Lading.


MM – Mercantile Marine.


M/R – Mate’s Receipt.


M/T – Metric Ton (2204 Ibs).


mt. – Empty.


M/V or MV – Motor Vessel.


MW – Minimum Weight Factor.