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1) The weight of water displaced by a floating vessel, thus, a boat's weight. Not to be confused with admeasurement tonnages.
2) Displacement (W): The weight of the ship and all the material on board measured in long tons (2,240 pounds) or metric tons (1,000 kgs or 2,204 lbs.). Displacement is directly related to displacement volume. In salt water one ton of displacement equals 35 cubic feet of volume; in fresh water one ton equals 36 cubic feet. In SI units in salt water one ton is equivalent to one cubic meter, in fresh water 1.025 cubic meters.