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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.
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).
The 2008 version of the Code details guidelines on Second Generation Intact Stability for ships, specifically criteria for dynamic stability and damage assessment. [7] The Code is split into two parts. Part A contains mandatory criteria. Part B contains additional guidelines and recommendations. [4]
Ship stability – Ship response to disturbance from an upright condition; Ship motion test – Scale model a hydrodynamic test to predict full size behaviour; Six degrees of freedom – Types of movement possible for a rigid body in three-dimensional space; Flight dynamics – Study of the performance, stability, and control of flying vehicles
Ship stability diagram showing centre of gravity (G), centre of buoyancy (B), and metacentre (M) with ship upright and heeled over to one side. As long as the load of a ship remains stable, G is fixed (relative to the ship). For small angles, M can also be considered to be fixed, while B moves as the ship heels.
Military Sealift Command ships as of January 2022 [1]. This is a list of Military Sealift Command ships.The fleet includes about 130 ships in eight programs: Fleet Oiler (PM1), Special Mission (PM2), Strategic Sealift (PM3), Tow, Salvage, Tender, and Hospital Ship (PM4), Sealift (PM5), Combat Logistics Force (PM6), Expeditionary Mobile Base, Amphibious Command Ship, and Cable Layer (PM7) and ...
Simpson's rules are a set of rules used in ship stability and naval architecture, to calculate the areas and volumes of irregular figures. [1] This is an application of Simpson's rule for finding the values of an integral, here interpreted as the area under a curve. Simpson's First Rule
A full list of United States Navy LSTs. The Landing Ship, Tanks (LSTs) built for the United States Navy during and immediately after World War II were only given an LST-number hull designation, but on 1 July 1955, county or Louisiana-parish names were assigned to those ships which remained in service. More recent LSTs were named on launching.