Terms & Glossaries of Shipping and Trading

NT (Net Tonnage)

The replacement, since 1994, for “Net Register Tonnage.” Theoretically the cargo capacity of the ship. Sometimes used to charge fees or taxes on a vessel. The formula is(0.2+0.02 log 10 (Vc)) Vc (4d/3D) 2 , for passenger ships the following formula is added: 1.25 (GT+10000)/10000 (N1+(N2/10)), where Vc is the volume of cargo holds, D is the distance between ship’s bottom and the uppermost deck, d is the draught, N1 is the number of cabin passengers, and N2 is the number of deck passengers.) “Ton” is figured as a 100 cubic foot ton. An approximate conversion ratio is 1NT = 1.7GT and 1GT = 1.5DWT.