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  2. Net tonnage - Wikipedia

    en.wikipedia.org/wiki/Net_tonnage

    The net tonnage calculation is based on a number of factors, one of which is the moulded draft d.The choice of the value to use for d can be complicated. For ships subject to the International Convention on Load Lines, the Summer Load Line draft is used, with the exception of cases where that is a timber load line.

  3. Tonnage - Wikipedia

    en.wikipedia.org/wiki/Tonnage

    Net register tonnage (NRT) is the volume of cargo the vessel can carry—that is, the gross register tonnage less the volume of spaces that do not hold cargo (e.g., engine compartment, helm station, and crew spaces, again with differences depending on which port or country does the calculations).

  4. Net register tonnage - Wikipedia

    en.wikipedia.org/wiki/Net_register_tonnage

    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.

  5. Gross tonnage - Wikipedia

    en.wikipedia.org/wiki/Gross_tonnage

    Gross tonnage, along with net tonnage, was defined by the International Convention on Tonnage Measurement of Ships, 1969, adopted by the International Maritime Organization (IMO) in 1969, and came into force on 18 July 1982. These two measurements replaced gross register tonnage (GRT) and net register tonnage (NRT). Gross tonnage is calculated ...

  6. Ton - Wikipedia

    en.wikipedia.org/wiki/Ton

    Gross tonnage and net tonnage are volumetric measures of the cargo-carrying capacity of a ship. The Panama Canal/Universal Measurement System (PC/UMS) is based on net tonnage , modified for Panama Canal billing purposes.

  7. Ship measurements - Wikipedia

    en.wikipedia.org/wiki/Ship_measurements

    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.

  8. Gross register tonnage - Wikipedia

    en.wikipedia.org/wiki/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 for volume.

  9. Tonnage tax - Wikipedia

    en.wikipedia.org/wiki/Tonnage_tax

    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.