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TONNAGE, mar. law. The capacity of a ship or vessel.
     2. The act of congress of March 2, 1799, s. 64, 1 Story's L. U. S. 630, directs that to ascertain the tonnage of any ship or vessel, the surveyor, &c. shall, if the said ship or vessel be double decked, take the length thereof from the forepart of the main stem, to the afterpart of the stern post, above the upper deck, the breadth thereof, at the broadest part above the mainwales, half of which breadth shall be accounted the depth of such vessel, and then deduct from the length three-fifths of the breadth, multiply the remainder by the breadth and the product of the depth, and shall divide this last product by ninety-five, the quotients whereof shall be deemed the true contents or tonnage of such ship or vessel. And if such ship or vessel shall be single decked, the said, surveyor shall take the length and breadth as above directed, in respect to a double deck ship or vessel, and shall deduct from the length three-fifths of the breadth, and taking the depth from the underside of the deck plank to the ceiling of the hold, shall multiply and divide as aforesaid, and the quotient shall be deemed the tonnage of such ship or vessel.
     3. The duties paid on the tonnage of a ship or vessel are also called tonnage.
     4. These duties are altogether abolished in relation. to American vessels by the act of May 31, 1830, s. 1, 4 Story's Laws U. S. 2216. And by the second section of the same act, all tonnage duties on foreign vessels are abolished, provided the president of the, United States shall be satisfied that the discriminating or countervailing duties of such foreign nation, so far as they operate to the disadvantage. of the United States, have been abolished.
     5. The constitution of the United States provides, art. 1, s. 10, n. 2, that no state shall, without the consent of congress, lay any duty on tonnage.

References in periodicals archive ?
Table 13: Global Merchant Shipping Fleet (2005): Percentage Breakdown of Deadweight Tonnage (dwt) by Foreign and National Flag by Select Countries 11 Development of Major Open Registry Flags 11
The new tanker is 140 meters long and 16 meters wide and has a 7100 deadweight tonnage (DWT) capacity.
They are being designed to provide the optimal power and speed for a wide variety of ship types, such as small handysize bulk carriers of less than 30,000 deadweight tonnage (DWT), product tankers, general cargo vessels, reefers, feeder container ships, and small LPG carriers.
We predict that demand of the ships for civil use will reach 11 million tons in 2005; the production capacity of China's shipping industry will reach 9 million deadweight tonnage.
It has a deadweight tonnage of 1,280 LT, tankage for 232,355 gals.
The approximate capacity of a ship in barrels is determined by using an estimated 90% of a ship's deadweight tonnage, and multiplying that by a barrel per metric ton conversion factor specific to each type of petroleum product and crude oil, as liquid fuel densities vary by type and grade.
It deals with container vessels of equal to 45,000 deadweight tonnage (DWT) and is competent of handling approximately 500,000 TEU yearly.
Between the start of 2005 and the start of 2014, the EU controlled fleet expanded by more than 70 percent in terms of both gross and deadweight tonnage.
1m in draft, with deadweight tonnage of 51,100 dwt, the vessel will have 36.
The terminal will comprise 2 berths of 600 m length and 16m depth each, which will get and process the deadweight tonnage up to 100 KMT.
428 vessels with a total deadweight tonnage of approximately 245 million tons.
The port system will serve vessels with a deadweight tonnage (DWT) of up to 80,000.