Assertion: diver's buoyancy | /r/HasProperty | concentrated in front of the diver
Facets:
value: primarily
type: DEGREE
Source sentences:
text: They were developed in the 1960s and have been largely superseded by wing and vest type BCs, primarily because the buoyancy is concentrated in front of the diver when full, and behind the neck when partially filled, producing a tendency to shift the diver's center of buoyancy towards the head with inflation, which adversely affects the diver's trim underwater.