Added by on 2012-09-01

A video explaining what is a Buoyancy Control Device (BCD) or a Buoyancy Compensator used in Scuba Diving. How the BCD works and the identification of the features.

Buoyancy Control Device-BCD regulates the level of buoyance required by the diver during the dive or after on the surface.

The tank backpack holds your tank on your back with one or two straps holding the dive tank in place and upright. This allows you to regulate the buoyancy under water or after the dive on the surface. The inflation/deflation hose location is going to be running over your left shoulder and resting at mid chest height.

Releases or Dump Valves:  Allows air to escape during or after your dive.

Overpressure Relief Valve:  Prevents the BCD from being overinflated, which can cause the bladder to rupture.  Located over the right shoulder area.

Weights:  You can have a weight belt but more common today are two large integrated pockets on each side that the diver can fill with their chosen amount of weight to be neutrally buoyant. Try to use soft weights before the harder lead weights to prevent damage to your BC.  Located on the right and left lower side of the vest, pockets.

Jacket Style BCD:  Another option, which is the most common, is a vest that the bladder goes around so the diver would be more upright at the surface.

Back Inflated BCD:  A back inflate BCD is more suitable for technical diving.

Hybrid Style BCD:  A back inflator that has clips to pull the inflated section around the right and left side of your ribs to assist in the upright. Or if you choose, you can unclip the sides and have more of a back inflated BC.

Master Scuba Dive Trainer Marcus Gee leaves your with a couple of points to remember:

  • Be a good dive buddy, stay close together.
  • Please respect and protect the aquatic environment, it is the only ocean we have.


Diving, Scuba Diving


BC, Buoyancy Compensator, Buoyancy Control Device, diving, Marcus Gee, Scuba BCD, scuba diving

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