This article is about a historic measure of a ship's internal volume, since superseded. It is not to be confused with deadweight tonnage or displacement (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 m3). Replaced by Gross Tonnage (GT), gross register tonnage uses the total permanently enclosed capacity of the vessel as its basis for volume. Typically this is used for dockage fees, canal transit fees, and similar purposes where it is appropriate to charge based on the size of the entire vessel. Internationally, GRT may be abbreviated as BRT for the German "Bruttoregistertonne".
Net register tonnage subtracts the volume of spaces not available for carrying cargo, such as engine rooms, fuel tanks and crew quarters, from gross register tonnage.[1][2]
Gross register tonnage is not a measure of the ship's weight or displacement and should not be confused with terms such as deadweight tonnage or displacement.
Gross register tonnage was defined by the Moorsom Commission in 1849. Gross and net register tonnages were replaced by gross tonnage and net tonnage, respectively, when the International Maritime Organization (IMO) adopted The International Convention on Tonnage Measurement of Ships on 23 June 1969. The new tonnage regulations entered into force for all new ships on 18 July 1982, but existing vessels were given a migration period of 12 years to ensure that ships were given reasonable economic safeguards, since port and other dues are charged according to ship's tonnage.
Since 18 July 1994 the gross and net tonnages, dimensionless indices calculated from the total moulded volume of the ship and its cargo spaces by mathematical formulae, have been the only official measures of the ship's tonnage.[3] However, the gross and net register tonnages are still widely used in describing older ships.
^Stopford, Martin (2009), Maritime Economics, Taylor & Francis, p. 752, ISBN9780415275576, retrieved 2011-10-17
^(PDF). National Institute of Standards and Technology. Archived from the original (PDF) on 19 October 2011. Retrieved 17 October 2011.
^International Convention on Tonnage Measurement of Ships 2013-12-02 at the Wayback Machine. International Maritime Organization (IMO). Retrieved 2011-10-17.
May 17, 2023
gross, register, tonnage, this, article, about, historic, measure, ship, internal, volume, since, superseded, confused, with, deadweight, tonnage, displacement, ship, gross, registered, tonnage, ship, total, internal, volume, expressed, register, tons, each, w. This article is about a historic measure of a ship s internal volume since superseded It is not to be confused with deadweight tonnage or displacement 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 m3 Replaced by Gross Tonnage GT gross register tonnage uses the total permanently enclosed capacity of the vessel as its basis for volume Typically this is used for dockage fees canal transit fees and similar purposes where it is appropriate to charge based on the size of the entire vessel Internationally GRT may be abbreviated as BRT for the German Bruttoregistertonne Net register tonnage subtracts the volume of spaces not available for carrying cargo such as engine rooms fuel tanks and crew quarters from gross register tonnage 1 2 Gross register tonnage is not a measure of the ship s weight or displacement and should not be confused with terms such as deadweight tonnage or displacement History EditFurther information Gross tonnage and Net tonnage Gross register tonnage was defined by the Moorsom Commission in 1849 Gross and net register tonnages were replaced by gross tonnage and net tonnage respectively when the International Maritime Organization IMO adopted The International Convention on Tonnage Measurement of Ships on 23 June 1969 The new tonnage regulations entered into force for all new ships on 18 July 1982 but existing vessels were given a migration period of 12 years to ensure that ships were given reasonable economic safeguards since port and other dues are charged according to ship s tonnage Since 18 July 1994 the gross and net tonnages dimensionless indices calculated from the total moulded volume of the ship and its cargo spaces by mathematical formulae have been the only official measures of the ship s tonnage 3 However the gross and net register tonnages are still widely used in describing older ships See also Edit Transport portalTon volume TonnageReferences Edit Stopford Martin 2009 Maritime Economics Taylor amp Francis p 752 ISBN 9780415275576 retrieved 2011 10 17 Units and Systems of Measurement Their Origin Development and Present Status PDF National Institute of Standards and Technology Archived from the original PDF on 19 October 2011 Retrieved 17 October 2011 International Convention on Tonnage Measurement of Ships Archived 2013 12 02 at the Wayback Machine International Maritime Organization IMO Retrieved 2011 10 17 Retrieved from https en wikipedia org w index php title Gross register tonnage amp oldid 1139880045, wikipedia, wiki, book, books, library,
