tonnage measurement of ships

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• Tonnage — Not to be confused with Ton. Tonnage is a measure of the size or cargo carrying capacity of a ship. The term derives from the taxation paid on tuns or casks of wine, and was later used in reference to the weight of a ship s cargo; however, in… …   Wikipedia

• Net tonnage — is calculated by measuring a ship s internal volume and applying mathematical formulae. Net tonnage (often abbreviated as NT, N.T. or nt) is a dimensionless index calculated from the total moulded volume of the ship s cargo spaces by using a… …   Wikipedia

• 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 in 1969, and came into force on July 18, 1982. These two measurements… …   Wikipedia

• Net register tonnage — See also: Ton#Units of volume 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 m3). It is calculated by reducing non revenue… …   Wikipedia

• Builder's Old Measurement — (BOM) is the method of calculating the size or cargo capacity of a ship used in England from approximately 1720 to 1849. The BOM estimated the tonnage of a ship based on length and maximum beam. The formula is: Tonnage = frac {({Length} Beam}… …   Wikipedia

• Gross Register Tonnage — NOTOC . [The corresponding mass depends on what the volume is filled with, for example, 1 GRT of water weighs around 2,800 kg.] This calculation of gross register tonnage is complex; a hold can, for instance, be assessed for grain (accounting for …   Wikipedia

• tonnage — ton‧nage [ˈtʌnɪdʒ] noun [countable, uncountable] 1. the total number of tons that something weighs: • The aim is to obtain the maximum saleable tonnage at reasonable cost. 2. TRANSPORT the size of a ship or the amount of goods it can carry,… …   Financial and business terms

• international tonnage certificate — A certificate issued by a government department in accordance with the International Convention of Tonnage Measurement of Ships stating the gross and net tonnages …   Dictionary of automotive terms

• tonnage — /tun ij/, n. 1. the capacity of a merchant vessel, expressed either in units of weight, as deadweight tons, or of volume, as gross tons. 2. ships collectively considered with reference to their carrying capacity or together with their cargoes. 3 …   Universalium

• 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. The standard CGT… …   Wikipedia

• History of research ships — The research ship had origins in the early voyages of exploration. By the time of James Cook s Endeavour , the essentials of what today we would call a research ship are clearly apparent. In 1766, the Royal Society hired Cook to travel to the… …   Wikipedia