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 ). 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 ".
5-473: SS Canadian Constructor was a 7,178 GRT refrigerated ship built in 1922 by Halifax Shipyards Ltd in Nova Scotia . The ship had 12 corrugated furnaces with a combined grate area of 264 square feet (25 m) heating her four 180 lb f /in single-ended boilers, which had a combined heating surface of 10,848 square feet (1,008 m). The boilers fed a 705 NHP triple expansion steam engine that
10-406: 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. However,
15-708: 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
20-491: Was built by Tidewater Shipbuilders Ltd of Trois-Rivières , Quebec. Her hull had a 13-ton fore peak tank and a 128-ton aft peak tank. The ship's first manager was Canadian National Steamships , which set up a one-ship company, Canadian Constructor Ltd, to own her. In 1939 she was sold to Ernels Shipping Co of London, who registered her in London as SS Argos Hill and her placed under the control of Counties Ship Management . She
25-551: Was damaged in an air attack on Convoy OA 178 in the English Channel on 4 July 1940. Argos Hill survived and remained in service until after the surrender of Germany , but was destroyed by fire on 7 August 1945 just a week before the surrender of Japan . Gross register tonnage 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. Gross register tonnage
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