Tonnage
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Tonnage is a measure of the capacity of a ship, and is commonly used to assess fees on commercial shipping. The term derives from the taxation paid on tuns or casks of wine. In modern maritime usage,
Traditional English wine cask units
Tonne
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The tonne is a unit of mass equal to 1,000 kilograms. It is also referred to as a metric ton in the United States to distinguish it from the non-metric units of the short ton and the long ton. One ton
Tonnage
…a vessel, where one register ton is equal to a volume of 100 cubic feet (2.83 m3); a volume that, if filled with fresh water, would weigh around 2.83 tonnes. The definition and calculation of the internal volume is complex; for instance, a ship's hold may be assessed for bulk grain (accounting for all the…
A one-tonne (1000-kilogram) concrete block in Leeds, UK