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| Term | Meaning |
| Manifest | A list of all cargoes that pertain to a specific shipment, grouping of shipments, or piece of equipment. Ocean carriers will prepare a manifest will prepare a manifest per container, etc. |
| Marine Insurance | Broadly, insurance covering loss or damage of goods at sea. Marine insurance typically compensates the owner of merchandise for losses sustained from fire, shipwreck, etc., but excludes losses that can be recovered from the carrier. |
| Measurement ton | Forty cubic feet; used in water transportation ratemaking. |
| Modal split | The relative use that companies make of transportation modes; the statistics include ton-miles, passenger-miles, and revenue. |