Marine Surveyors Lexicon

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Gross Tonnage (Admeasure)


A vessel's approximate volume.

Under the Convention Measurement System, it means the total volume of all enclosed spaces modified by a coefficient.

Under the Standard and Dual Measurement Systems, it means the total volume of all enclosed spaces less certain exempt spaces.

Under the Simplified Measurement Systems, it means the product of a vessel's length, depth, and breadth modified by a coefficient.