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Le port en lourd est aussi un outil servant à classer les navires marchands ( cargos, pétroliers …) : on l'abrège souvent en tpl (« tonnes de port en lourd »), ou avec l'abréviation anglaise DWT (« deadweight tons »). On parle par exemple d'un « vraquier de 70 000 tpl ». Par abus de langage, on parle souvent d'un « navire de 70 000 ...
Tonnage. Le tonnage ou jauge d'un navire est la capacité de transport d'un navire de commerce évaluée par son volume intérieur (capacité cubique). Le tonnage résulte d'un calcul complexe, qui estime le volume intérieur. Le tonnage est exprimé en tonneaux (le tonneau est équivalent à 2,83 m3) pour les petits bateaux et en unités UMS ...
Feb 1, 2019 · 01 Feb, 2019. Le tonnage de port en lourd (DWT) fait référence à la capacité de charge d'un navire. Le tonnage de port en lourd peut être calculé en prenant le poids d'un navire qui n'est pas chargé de cargaison et en soustrayant ce chiffre du poids du navire chargé au point où il est immergé à la profondeur maximale de sécurité.
- Current Maritime Units
- Historical Maritime Units
- See Also
- Bibliography
Tonnage measurements are governed by an IMO Convention (International Convention on Tonnage Measurement of Ships, 1969 (London-Rules)), which initially applied to all ships built after July 1982, and to older ships from July 1994.A commonly defined measurement system is important, since a ship's registration fee, harbour dues, safety and manning ru...
Traditional casks
Historically in England, tunnage was the medieval import duty on tuns of wine. A tun was a large size of casks used for wine), used in the wine trade. The number of tuns that a ship could carry was used as a measure of the size of the ship. The wine trade to England originated in France, which is where the tuns were made. A French standard tun cask size was established about 1450.: 9 The 15th century Bordeaux wine tun was between 240 and 252 imperial gallons (1,090 and 1,150 L; 288 and 303 US...
Purpose of measuring tonnage
Tonnage measurement was important for an increasing number of reasons through history. In England in the Middle Ages, ships were often impressed by the crown for military use. To do this in an efficient and speedy manner, a measurement of size was needed. The payment to the owner of the requisitioned ship was based on the tonnage. Port dues and various licences were based on tonnage, and it was a useful measure for a ship builder who needed to build a vessel that met the new owner's requireme...
Method of measuring
In the middle ages, the normal way of discovering the tonnage of a ship was to load her with wine and see how many tuns could be fitted in. There is an instance of the owner of a new ship, in 1459, being challenged that his safe-conduct was for a 400 ton vessel, whilst he had already loaded more than 600 tons. The excuse was accepted that he had no idea of her tonnage until she was loaded. In another case, in 1456, a dispute over the actual tonnage of a ship had to be resolved by having coope...
The Oxford Companion To Ships & The Sea, by I. C. B. Dear and Peter Kemp. Oxford University Press, 1979. ISBN 0-19-860616-8Ship Design and Construction, Volume II; Thomas Lamb, Editor. Society of Naval Architects and Marine Engineers, 2004. ISBN 99909-0-620-3Lane, Frederic C. (1964). "Tonnages, Medieval and Modern". The Economic History Review. 17 (2): 213–233. ISSN 0013-0117. JSTOR 2593003.Deadweight tonnage (DWT) is a fundamental measurement in maritime transportation, representing the total weight a vessel can carry, including cargo, fuel, provisions, and crew, expressed in metric tons. Understanding DWT is crucial for shipowners, charterers, and port authorities alike, as it determines a vessel’s capacity and operational ...
Other articles where deadweight tonnage is discussed: tonnage: Deadweight tonnage is a measurement of total contents of a ship including cargo, fuel, crew, passengers, food, and water aside from boiler water. It is expressed in long tons of 2,240 pounds (1,016.0469088 kilograms).
