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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).
Today, bulk carriers make up 21 percent of the world's merchant fleets, [2] and they range in size from single-hold mini-bulk carriers to mammoth ore ships able to carry 400,000 metric tons of deadweight (DWT). A number of specialized designs exist: some can unload their own cargo, some depend on port facilities for unloading, and some even ...
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 (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. [1] Draft or draught (d) or (T) – The vertical distance from the bottom of the keel to the waterline. Used mainly to determine the minimum water depth ...
A Panamax cargo ship would typically have a DWT of 65,000–80,000 tonnes, but its maximum cargo would be about 52,500 tonnes during a transit due to draft limitations in the canal. [7] New Panamax ships can carry 120,000 DWT. [8] Panamax container ships can carry 5,000 twenty-foot equivalent units (TEU), with 13,000 TEU for New Panamax vessels.
Modern handymax and supramax designs are typically 52,000 58,000 t DWT in size, have five cargo holds and four cranes of around 30 tonnes working load, making it easier to use in ports with limited infrastructure. The average speed depends on size and age. The cost of building a handymax is driven by the laws of supply and demand.
Oceangoing chemical tankers range from 5,000 tonnes deadweight (DWT) to 35,000 DWT in size, which is smaller than the average size of other tanker types due to the specialized nature of their cargo and the size restrictions of the port terminals where they call to load and discharge.
DWT may stand for: Discrete wavelet transform , a mathematical procedure in numerical analysis and functional analysis Driving While Texting , Is the act of composing, sending, or reading text messages, email, or making other similar use of the internet on a mobile device, while operating a motor vehicle, such as an automobile, truck or train.
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