SCUBA Diving Equipment Slang

Here are some of the different ways to talk about your scuba diving gear or scuba diving kit.

BC, BCD, jacket, wing BCD is an abbreviation for buoyancy control device, a common piece of diving equipment. It’s basically an air bladder divers use to adjust their buoyancy. The two most common types of BCs are:

  • Jacket – a vest with an air bladder inside that inflates around your torso.

  • Back inflate – the air bladder is behind you and inflates around either side of the tank.

Many divers attach their scuba cylinder to their BCD, but this isn’t the only way to go. Some divers use a harness or backplate and others dive with a tank (or tanks) beside them (sidemount).