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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.
Tonnage is a measure of the capacity of a ship, and is commonly used to assess fees on commercial shipping.The term derives from the taxation paid on tuns or casks of wine. In modern maritime usage, "tonnage" specifically refers to a calculation of the volume or cargo volume of a ship.
This is a list of ports of the United States, ranked by tonnage. [1] Ports in the United States handle a wide variety of goods that are critical to the global economy, including petroleum, grain, steel, automobiles, and containerized goods. See the articles on individual ports for more information, including history, geography, and statistics.
By 2019, tonnage tax rules were applied in many countries, including Japan, South Korea and 22 EU countries. [1] In 2023, the tonnage tax applies to 23 European countries and 86% of the world fleet. All the leaders in the maritime container shipping sector are affected: MSC, Maersk, Hapag-Lloyd, CMA-CGM, Cosco (China) and One (Japan).
(Merchant ships display gross tonnage ; see tonnage), deadweight and the number of items it can carry i.e. TEU 20 ft equivalent units. Displacement is expressed in tonnes (metric unit). Displacement of a ship built for the US is in long tons, Warships are shown in displacement tons or tonnes. To preserve secrecy, nations sometimes misstate a ...
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.