This is not a measurement of weight as we traditionally think of it. It is a measurement of the amount of vessel space: a ton is 100 cubic feet. A ship's gross tonnage is all the cubic feet in its enclosed spaces: cargo holds, engine room, and deck house divided by 100. See net tonnage.

Applies to vessels, not to cargo. Determined by dividing by 100 the contents, in cubic feet, of the vessel's closed-in spaces. A vessel ton is 100 cubic feet.

Abbreviation: GRT The measure of the overall size of a vessel determined in accordance with the provisions of the international convention on measurement of vessels usually expressed in register ton.

The sum of container, breakbulk and bulk tonnage.

The entire internal cubic capacity of the ship expressed in tons of 100 cubic feet to the ton, except certain spaces which are exempted, such as: (1) peak and other tanks for water ballast; (2) spaces above the uppermost continuous deck, such as: open forecastle, bridge and poop, certain light and air spaces, domes of skylights, condenser, anchor gear, steering gear, wheel house, galley and cabins for passengers.

The capacity of the vessel calculated by approved formula. The gross tonnage is a figure representative of the volume of the enclosed space in cubic metres (1969 Tonnage Convention).

Applies to vessels, not to cargo, (0.2+0.02 log10V) where V is the volume in cubic meters of all enclosed spaces on the vessel.

A measure of the capacity of the ship in which 1 ton is equivalent to 100 cubic feet.

the total of all enclosed spaces within a ship, expressed in tons each of which is equivalent to 100 cubic feet.

Total carrying capacity of a vessel in units of 100 cubic feet.

Applies to the total volume, in vessell tons, of a vessels closed-in spaces. Determined by dividing the contents by 100, in cubic feet. (A vessel ton is 100 cubic feet.)