The treaty defined standard displacement as a ship complete, fully manned, equipped, and ready for sea. The figure included armament, ammunition, crew provisions, fresh water, stores, and working equipment. It excluded fuel and reserve boiler feed water, two variable loads that could obscure comparisons between navies. Treaty tons were long tons of 2,240 pounds, about 1,016 kilograms, so the definition governed both what was counted and the unit used.
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What standard displacement meant under the treaty
Treaty standard displacement counted a fully equipped ship and its stores while excluding fuel and reserve boiler feed water.