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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).
DWT GT/GRT In service Status Notes Image Reference Valemax (68 ships) 360–362 m (1,181–1,188 ft) 380,000–400,000 DWT: 200,000 GT: 2011– In service As of 2018, there are five different ship designs that are referred to as Valemax ships. [14] Berge Stahl: 342 m (1,122 ft) 364,767 DWT: 175,720 GT: 1986–2021 Broken up
The ship's hydrostatic tables show the corresponding volume displaced. [4] To calculate the weight of the displaced water, it is necessary to know its density. Seawater (1,025 kg/m 3) is more dense than fresh water (1,000 kg/m 3); [5] so a ship will ride higher in salt water than in fresh. The density of water also varies with temperature.
Lightweight displacement – LWD – The weight or mass of the ship excluding cargo, fuel, ballast, stores, passengers, and crew, but with water in the boilers to steaming level. 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 ...
Deadweight loss, a loss of economic efficiency that can occur when equilibrium for a good or service is not Pareto optimal; Deadweight tonnage, a ship's carrying capacity, which includes cargo, fuel, crew, etc. Dead weight or dressed weight, the weight of an animal carcass after removal of skin, head, feet, visceral organs, etc.
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.
The typical deadweight of a Suezmax ship is about 160,000 tons; the typical beam (width) is about 48 m (157.5 ft). Also of note is the maximum head room—" air draft "—limitation of 68 m (223.1 ft), resulting from the 70-metre (230 ft) height above water of the Suez Canal Bridge .
The world's total oil tankers deadweight tonnage has increased from 326.1 million DWT in 1970 to 960.0 million DWT in 2005. [61] The combined deadweight tonnage of oil tankers and bulk carriers, represents 72.9% of the world's fleet. [62]