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Gross tonnage is calculated based on "the moulded volume of all enclosed spaces of the ship" and is used to determine things such as a ship's manning regulations, safety rules, registration fees, and port dues, whereas the older gross register tonnage is a measure of the volume of only certain enclosed spaces.
OOCL G-class container ship Container ship: 399.9 m (1,312 ft) 61.3 m (201 ft) 235,341: In service COSCO Shipyard Group: OOCL: ONE Innovation: ONE I-class container ship Container ship: 399.9 m (1,312 ft) 61.4 m (201 ft) 235,311: In service Japan Marine United Corporation: Ocean Network Express: Nissei Maru: Globtik Tokyo class Supertanker
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.
A shipping ton, freight ton, measurement ton or ocean ton is a measure of volume used for shipments of freight in large vehicles, trains or ships. In the USA, it is equivalent to 40 cubic feet (1.1 m 3) while in the UK it is 42 cubic feet (1.2 m 3). [1] [2] It should not be confused with other types of ton which also measure
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.
Compensated Gross Tonnage (CGT) is an indicator of the amount of work that is necessary to build a given ship and is calculated by multiplying the tonnage of a ship by a coefficient, which is determined according to type and size of a particular ship.
Global-class ships were originally planned to measure 201,000 gross tonnage (GT), [8] but were increased to 208,000 GT in the final design. [10] They are 342 metres (1,122 ft 1 in) in length, with a beam of 46.4 metres (152 ft 3 in) and a draft of 9.5 metres (31 ft 2 in). [ 10 ]
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.