claim: The Beguiled's script was written by a Canadian.
evidence: A buoyancy compensator also called a buoyancy control device , BC , BCD , stabilizer , stabilisor , stab jacket , wing or ABLJ depending on design , is a piece of diving equipment containing an inflatable bladder which is worn by divers to establish neutral buoyancy underwater and positive buoyancy on the surface , when needed .. diving equipment. diving equipment. neutral buoyancy. neutral buoyancy. buoyancy. buoyancy. The buoyancy is controlled by adjusting the volume of air in the bladder .. buoyancy. buoyancy. The bladder is filled with gas from the diver 's air tank via a low-pressure hose from the regulator first stage , directly from a small cylinder dedicated to this purpose , or from the diver 's mouth through the oral inflation valve .