Assertion: diver's buoyancy compensator | /r/HasProperty | sleeveless
Facets:
value: usually
type: DEGREE
Source sentences:
text: Buoyancy compensator, also known as Buoyancy Control Device, BCD or BC - is usually a back mounted or sleeveless jacket style device which includes an inflatable bladder used to adjust the buoyancy of the diver under water, and provide positive buoyancy at the surface.