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Standard displacement, also known as "Washington displacement", is a specific term defined by the Washington Naval Treaty of 1922. [11] "It is the displacement of the ship complete, fully manned, engined, and equipped ready for sea, including all armament and ammunition, equipment, outfit, provisions and fresh water for crew, miscellaneous ...
Lightship or Light Displacement [ edit ] The vessel is complete and ready for service in every respect, including permanent ballast , spare parts, lubricating oil, and working stores but is without fuel, cargo, drinking or washing water, officers, crew, passengers, their effects, temporary ballast or any other variable load.
Loadline displacement – The weight or mass of the ship loaded to the load line or plimsoll mark. Deadweight tonnage (DWT) is a measure of how much weight a ship can carry. [ 1 ] [ 2 ] [ 3 ] It is the sum of the weights of cargo, fuel, fresh water, ballast water , provisions, passengers, and crew.
Lightship Finngrundet, now a museum ship in Stockholm.The day markers can be seen on the masts. Fehmarnbelt Lightship, now a museum ship in Lübeck Bürgermeister O´Swald II was the world's largest manned lightship, the last lightship at position Elbe 1.
The acceptable deviation of lightship displacement should be between 1 and 2% of the lightship displacement of the lead ship, depending on the length of the ship. [2]
Inclining test – Test to determine stability, lightship weight, and center of gravity of a ship; Kronan (ship) – Swedish Navy ship of the 1670s; Mary Rose – English Tudor warship (1511–1545) Niobe (schooner) – Training schooner of the Reichsmarine; Pamir (ship) – German sailing ship
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, "tonnage" specifically refers to a calculation of the volume or cargo volume of a ship.
Deadweight tonnage is a measure of a vessel's weight carrying capacity, not including the empty weight of the ship. It is distinct from the displacement (weight of water displaced), which includes the ship's own weight, or the volumetric measures of gross tonnage or net tonnage (and the legacy measures gross register tonnage and net register tonnage).