Abstract: The present invention provides an aircraft buoyancy system (14) for providing positive buoyancy to an aircraft (15) to keep it afloat at the surface of a body of water (16) after crashing, ditching or landing into a body of water (16). The aircraft buoyancy system (14) comprises at least one inflatable body (1) which, when inflated, increases the buoyancy of the aircraft (14), and a gas generation system (4) to inflate the at least one inflatable body (1). The aircraft buoyancy system (14) also comprises a sensor and activation system (3) to activate the gas generation system (4). Upon activation of the sensor and activation system (3) the gas generation system (4) causes a gas to flow to the at least one inflatable body (1), causing the aircraft (15) to float and remain at the surface of a body of water (16).

Abstract: The present invention provides a buoyancy system for moving an object in a body of water. The system includes at least one inflatable body which, when inflated, increases the buoyancy of the object, and an inflation apparatus to inflate the at least one inflatable body. The system also includes an activation system to activate the inflation apparatus. Upon activation of the activation system the inflation apparatus causes a gas to flow to the at least one inflatable body, causing the object to move.