buoyancy compensator

American

noun

Scuba Diving.

an inflatable vest used to control one's buoyancy underwater or to rest at the surface, usually having a connecting hose for inflation or deflation by mouth and a CO 2 cartridge for rapid, emergency inflation.

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So you and your buddy run through the steps: Does your buoyancy compensator work?

From Forbes • Oct. 22, 2014

Scuba equipment has not changed much since the buoyancy compensator was developed a few years ago.

From Time Magazine Archive

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