44 of 69Sharm el Sheikh 2007
Buoyancy Control Device (BCD, the vest-like thing) with air tank and regulator + pressure gauge. The BCD is an inflatable vest. Together with the weight belt, the wetsuit and your natural buoyancy, you use it to control your ascending and descending. Mostly, though, you use your lungs as a control device and use the BCD for neutral trim.