Ton

Ton has two meaings.

1. A unit of volume equal to 13.5 cubic meters. It is derived from the volume of a ton (mass) of liquid hydrogen, the fuel used by starships.
2. Ton (or tonne) is a unit of mass equal to one thousand kilograms.

Where it is important to distinguish between the two the former is refered to as a dTon (for displacement Ton) and the latter as an sTon (for standard Ton).

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