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Standard displacement, also known as "Washington displacement", is a specific term defined by the Washington Naval Treaty of 1922. [ 11] ". It is the displacement of the ship complete, fully manned, engined, and equipped ready for sea, including all armament and ammunition, equipment, outfit, provisions and fresh water for crew, miscellaneous ...
Dimensional weight, also known as volumetric weight, is a pricing technique for commercial freight transport (including courier and postal services ), which uses an estimated weight that is calculated from the length, width and height of a package. The shipping fee is based upon the dimensional weight or the actual weight, whichever is greater.
Net tonnage ( 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. Defined in The International Convention on Tonnage Measurement of Ships that was adopted by the International Maritime Organization in 1969, the net tonnage replaced the earlier net register ...
For small angles, M can also be considered to be fixed, while B moves as the ship heels. The metacentric height ( GM) is a measurement of the initial static stability of a floating body [ 1]. It is calculated as the distance between the centre of gravity of a ship and its metacentre. A larger metacentric height implies greater initial stability ...
Gross tonnage. Gross tonnage is calculated by measuring a ship's volume (from keel to funnel, to the outside of the hull framing) and applying a mathematical formula. Gross tonnage ( GT, G.T. or gt) is a nonlinear measure of a ship's overall internal volume. Gross tonnage is different from gross register tonnage. [ 1]
Graphical representation of the dimensions used to describe a ship. Length between perpendiculars (often abbreviated as p/p, p.p., pp, LPP, LBP or Length BPP) is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the sternpost, or main stern perpendicular member.
Freight rate. A freight rate (historically and in ship chartering simply freight[ 1]) is a price at which a certain cargo is delivered from one point to another. The price depends on the form of the cargo, the mode of transport ( truck, ship, train, aircraft ), the weight of the cargo, and the distance to the delivery destination.
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 100 cubic feet (2.83 m 3).It is calculated by subtracting non-revenue-earning spaces i.e. spaces not available for carrying cargo, for example engine rooms, fuel tanks and crew quarters, from the ship's gross register tonnage.