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Net tonnage is used to calculate the port duties and should not be taken as less than 30 per cent of the ship's gross tonnage. [2] Net tonnage is not a measure of the weight of the ship or its cargo, and should not be confused with terms such as deadweight tonnage or displacement. Also, unlike the net register tonnage, the net tonnage is ...
Net register tonnage (NRT, nrt, n.r.t.) is a ship's cargo volume capacity expressed in "register tons", one of which equals to a volume of 100 cubic feet (2.83 m 3).It is calculated by subtracting non-revenue-earning spaces i.e. spaces not available for carrying cargo, for example engine rooms, fuel tanks and crew quarters, from the ship's gross register tonnage.
Since gross tonnage is a bijective function of ship volume, it has an inverse function, namely ship volume from gross tonnage, but the inverse cannot be expressed in terms of elementary functions. A root-finding algorithm may be used for obtaining an approximation to a ship's volume given its gross tonnage.
(Merchant ships display gross tonnage ; see tonnage), deadweight and the number of items it can carry i.e. TEU 20 ft equivalent units. Displacement is expressed in tonnes (metric unit). Displacement of a ship built for the US is in long tons, Warships are shown in displacement tons or tonnes. To preserve secrecy, nations sometimes misstate a ...
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.
Gross register tonnage (GRT, grt, g.r.t., gt), or gross registered tonnage, is a ship's total internal volume expressed in "register tons", each of which is equal to 100 cubic feet (2.83 m 3). Replaced by Gross Tonnage (GT), gross register tonnage uses the total permanently enclosed capacity of the vessel as its basis for volume.
A tonnage tax is a taxation mechanism that can be applied to shipping companies instead of ordinary corporate taxation. The tax is determined by the net tonnage of the entire fleet of vessels under operation or use by a company. It is on the basis of this variable that taxation is applied.
for net tonnage: 36,000 net tonnage (NT) dimensionless index: modern {{Twenty-foot equivalent units}} for twenty-foot equivalent units: 36,000 twenty-foot equivalent units (TEU) capacity: modern {{Net register tonnage}} for net register tonnage: 36,000 net register tons (NRT) volume: outdated {{Gross register tonnage}} for gross register ...