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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.
Net tonnage (NT, N.T. or nt) is a dimensionless index calculated from the total moulded volume of the ship's cargo spaces by using a mathematical formula. Defined in The International Convention on Tonnage Measurement of Ships that was adopted by the International Maritime Organization in 1969, the net tonnage replaced the earlier net register ...
Gross tonnage. Gross tonnage is calculated by measuring a ship's volume (from keel to funnel, to the outside of the hull framing) and applying a mathematical formula. Gross tonnage (GT, G.T. or gt) is a nonlinear measure of a ship's overall internal volume. Gross tonnage is different from gross register tonnage. [ 1 ]
Gross register tonnage. 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 ...
GT replaced Gross register tonnage (GRT) which is now an obsolete unit. Net tonnage – NT – Not expressible in units of mass or weight but is based on the cargo volume of the vessel in cubic meter with a formula applied. NT replaced Net register tonnage (NRT) which is now an obsolete unit.
Gross tonnage Status Main builder Operator ref Pioneering Spirit - Crane vessel: 382 m (1,253 ft) 124 m (407 ft) 10–15 m (33–49 ft) 403,342 In service Daewoo Shipbuilding & Marine Engineering: Allseas [1] Prelude FLNG - Floating production storage and offloading: 488 m (1,601 ft) 74 m (243 ft) 17 m (56 ft) 300,000 In service
To show net register tonnage in a consistent manner that is compliant with WP:MOSNUM. In particular it: standardizes capitalization and spelling (i.e. NRT, Nrt, nrt, N.R.T., n.r.t. and so forth), standardizes the link to the definition, links to net register tonnage on the first use in an article,
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.