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Ship stability is an area of naval architecture and ship design that deals with how a ship behaves at sea, both in still water and in waves, whether intact or damaged. Stability calculations focus on centers of gravity , centers of buoyancy , the metacenters of vessels, and on how these interact.
Simpson's rules are used to calculate the volume of lifeboats, [6] and by surveyors to calculate the volume of sludge in a ship's oil tanks. For instance, in the latter, Simpson's 3rd rule is used to find the volume between two co-ordinates. To calculate the entire area / volume, Simpson's first rule is used. [7]
In the diagram above, the two Bs show the centres of buoyancy of a ship in the upright and heeled conditions. The metacentre, M, is considered to be fixed relative to the ship for small angles of heel; however, at larger angles the metacentre can no longer be considered fixed, and its actual location must be found to calculate the ship's stability.
CargoMax is a stability and load management software application for marine and offshore industries. It is developed and sold by Herbert-ABS Software Solutions, LLC. First released in 1979, [1] CargoMax was one of the first computerized systems for planning and evaluating ship loading; it is currently one of the most-used software applications for this purpose. [2]
The Code for Intact Stability was first issued in 1993 under IMO resolution A.749(18)). [1] In 2008, the Code was updated by the IMO. [1] In December 2019, amendments to the Code were adopted that entered into force on 1 January 2020. [5]
The Code details procedures for safe and secure stowage and timber securing systems. It also includes guidance for ship securing manuals and checklists for safe operations. [1] Because of the increased weight of timber cargoes on a deck, the Code requires the ship's stability to be calculated according to a set list of criteria and guidance. [4]
Used mainly to determine the minimum water depth for safe passage of a vessel and to calculate the vessels displacement (obtained from ships stability tables) so as to determine the mass of cargo on board. Draft, Air – Air Draft/Draught is the distance from the water line to the highest point on a ship (including antennas) while it is loaded ...
The stability conditions of watercraft are the various standard loading configurations to which a ship, boat, or offshore platform may be subjected. They are recognized by classification societies such as Det Norske Veritas , Lloyd's Register and American Bureau of Shipping (ABS).