Centre of buoyancy

Centre of Buoyancy. The point through which the entire upward thrust of an aeroplane, glider, gyroplane, balloon or airship, or the hull or floats of a seaplane may be assumed to act.

The seaplane tends to use its centre of buoyancy (COB) as a pivot point wherever it may be. Centre of buoyancy moves laterally, as well as forward and aft. Each object in water has a point of centre of buoyancy.