Buoyancy Control Systems

1. Measure your chest and waist over a thin shirt—most BCDs fit true to jacket size.

2. Check lift capacity—warm-water divers need 15–25 lb; cold-water drysuit divers often need 35 lb or more.

3. Confirm tank band height aligns with your center of gravity; a well-balanced BCD reduces trim weight.

4. Test range of motion—raise arms and simulate reaching valves. Straps should stay snug without pinching.

Need personal advice? Visit us in store or call (909) 621-4171 to speak with our dive specialists and lock in the right fit.

A BCD (Buoyancy Control Device) lets you add or release air to stay neutral underwater, positive on the surface, and negative during descents. It also secures your cylinder and provides attachment points for accessories.

A buoyancy compensator jacket wraps air cells around your torso, giving an upright surface position—great for training and photography. A back-inflate BCD keeps the bladder behind you, improving trim and reducing front bulk for experienced divers.

Add the weight of your tank, ballast, and exposure suit, then pick a BCD with lift capacity that exceeds that total by at least 10 lb (4.5 kg). Cold-water and technical setups usually need higher lift than tropical rigs.

Yes. Look for “travel” models that pack flat and weigh under 6 lb (2.7 kg). Remove the inflator hose and dump valves if you need extra space.

Rinse after every dive, store partially inflated, and schedule a professional inspection once a year—or sooner if you notice sticky valves or worn dump-cords