18 relations: Cargo, Crew, Displacement (ship), Draft (hull), Fresh water, Gross register tonnage, Gross tonnage, Long ton, MARPOL 73/78, Net register tonnage, Net tonnage, Seawater, SOLAS Convention, Specific gravity, Summer draft, Tonne, Waterline, Weight.

## Cargo

In economics, cargo or freight are goods or produce being conveyed – generally for commercial gain – by water, air or land.

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## Crew

A crew is a body or a class of people who work at a common activity, generally in a structured or hierarchical organization.

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## Displacement (ship)

The displacement or displacement tonnage of a ship is its weight, expressed in long tons of water its hull displaces.

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## Draft (hull)

The draft or draught of a ship's hull is the vertical distance between the waterline and the bottom of the hull (keel), with the thickness of the hull included; in the case of not being included the draft outline would be obtained.

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## Fresh water

Fresh water (or freshwater) is any naturally occurring water except seawater and brackish water.

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## Gross register tonnage

Gross register tonnage (GRT, grt, g.r.t., gt) or gross registered tonnage, is a ship's total internal volume expressed in "register tons", each of which is equal to.

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## Gross tonnage

Gross tonnage (often abbreviated as GT, G.T. or gt) is a nonlinear measure of a ship's overall internal volume.

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## Long ton

Long ton, also known as the imperial ton or displacement ton,Dictionary.com - "a unit for measuring the displacement of a vessel, equal to a long ton of 2240 pounds (1016 kg) or 35 cu.

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## MARPOL 73/78

The International Convention for the Prevention of Pollution from Ships, 1973 as modified by the Protocol of 1978 (MARPOL 73/78, MARPOL is short for marine pollution and 73/78 short for the years 1973 and 1978) is one of the most important international marine environmental conventions.

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## Net register tonnage

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.

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## Net tonnage

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 mathematical formula.

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## Seawater

Seawater, or salt water, is water from a sea or ocean.

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## SOLAS Convention

The International Convention for the Safety of Life at Sea (SOLAS) is an international maritime treaty which sets minimum safety standards in the construction, equipment and operation of merchant ships.

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## Specific gravity

Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

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## Summer draft

Summer draft is a naval term for the worst-case loaded draft a ship can have.

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## Tonne

The tonne (Non-SI unit, symbol: t), commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000 kilograms;.

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## Waterline

The waterline is the line where the hull of a ship meets the surface of the water.

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## Weight

In science and engineering, the weight of an object is related to the amount of force acting on the object, either due to gravity or to a reaction force that holds it in place.

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## Redirects here:

Dead weight ton, Dead weight tonnage, Deadweight Tonnage, Deadweight ton, Deadweight tons.