Registration and tonnage = ship’s nationality and country of registration based on the flag to fly and the tonnage. – Gross Registered Tonnage (GRT) = ship’s total cubic capacity in terms of 100 cubic feet per ton. – Net Registered Tonnage (NRT) = measured by subtracting the space occupied by machinery and crew space from GRT. – Grain Capacity = the total capacity of the ship’s cargo spaces and include hatchways, and the opening of the ship’s deck for lowering cargo. – Bale Capacity = the total amount of underdeck capacity available for packed cargo. – Dead Weight Tonnage(DWT) =represents the vessel’s carrying capacity expressed in weight ton.The cargo carrying capacity would be the DWT minus the space occupied by bunkers, stores, water, and provisions. – Loadline = marks on the vessel to indicate the limit up to which the vessel can be loaded without endangering its safety.
– Length Overall (LOA) = the greatest length of the ship, from fore to aft. This length is important when docking the vessel. – Beam =the greatest breadth of the ship, from port to starboard. – Draught =the distance from the bottom of the keel to the waterline. – Freeboard = the distance from the waterline to the top of the deck plating at the side of the deck amidships. – Displacement =the weight of the ship and all that it contains – cargo, fuel, water, stores, crew and effects. A ship can have different displacements at different draughts. – Lightweight =The weight of a ship when empty of stores, fuel, water, crew or their affects.
