A measure of the overall internal volume of a vessel, calculated according to the International Convention on Tonnage Measurement of Ships (1969). Gross tonnage (GT) is a dimensionless index derived from the total volume of all enclosed spaces and is used for regulatory, safety, and fee calculations.
Also known as: GT.
Category: Cargo & Trade
On The Maritime
The desks where this concept is measured.
In the Glossary
Gross TonnageGT
A dimensionless measure of a ship’s total internal volume, used for regulation, manning and port-due calculations.
Read the full explanation in the GlossaryRelated terms
More in Cargo & Trade
FEUForty-foot Equivalent Unit, a measure of container capacity equal to two TEU, based on the standard 40-foot intermodal container.FOBFree On Board, an Incoterm under which the seller delivers the goods on board the vessel nominated by the buyer at the named port of shipment.Freight RateThe price charged by a carrier for the transportation of cargo from origin to destination, expressed per tonne, per container (TEU/FEU), or as a lump sum.IncotermsInternational Commercial Terms published by the International Chamber of Commerce (ICC) that define the responsibilities, costs, and risks between buyers and sellers in international trade transactions.LashingThe process of securing cargo aboard a vessel using chains, wires, ropes, turnbuckles, and other fittings to prevent movement during the voyage.Lay DaysThe range of dates within which a vessel must arrive at the loading port and present notice of readiness to the charterer.
Back to DictionaryEntry updated May 2026