Tonnage refers to the volume and there are a few types of tonnage that you will come across frequently.

GROSS TONNAGE

Gross Tonnage is indicative of the total volume of the of a ship and may be often used in reference to the size of the ship.

Gross Tonnage

 

NET TONNAGE

Net tonnage is indicative of the of the cargo and passenger spaces in a ship which produces the revenue.

Net Tonnage

LIGHTSHIP WEIGHT

Lightship weight/light weight: Is the weight of the hull steel, machinery and outfit.

DEAD WEIGHT

Dead Weight: The carrying capacity of the ship namely the total weight of cargo + fuel + fresh water + ballast + Crew & effects.

It is also = Load displacement upto the minimum permitted freeboard – lightweight

The weight of the cargo that can be carried is called as Cargo Deadweight.

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