A buoyancy compensator (also known as a buoyancy control device, BCD, or BC) has two basic functions in scuba diving. It allows a diver to control his buoyancy, and therefore his depth, during a dive, and it attaches the tank to the diver.
While all buoyancy compensators share these common functions, they accomplish the functions in a startling variety of ways. From the differences between vest-style and back-inflating buoyancy compensators, to the various kinds of accessory pockets, scuba divers should have a clear understanding of the different styles of BCs before purchase. Here are twelve common features of BCs to consider.
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- Inflation StyleCressi Start and Aqualung Libra Buoyancy Compensators
- LiftPhotos of the Cressi Back Jac and Cressi Aqua Pro 5
- Integrated Weight SystemsPhotos of the Cressi Aqua Pro 5, Oceanic Aeris and ScubaPro Equator Buoyancy Compensators.
- Trim Weight PocketsPhotos of the Cressi Aqua Ride and Aqualung Zuma Buoyancy Compensators
- Dump Valves
- Integrated Alternate Air SourcePhotos of Integrated Alternate Air Source Regulators for Buoyancy Compensators
- D RingsScubaPro Geo and Cressi Aqua Ride Lady Buoyancy Compensators
- Light Weight and Easy to PackPhotos of the ScubaPro Geo, Cressi Flex in the Sea, and Aqualung Zuma Buoyancy Compensators
- Back Plate and WingHollis Wing and Back Plate
- Accessory PocketsScubaPro and Aqualung Buoyancy Compensator Pockets
- Chest Straps
- Women's Styles
- Graphic Index
- Text Index

