A Buoyancy Compensator (BC) is a vital piece of diving equipment that helps divers maintain neutral buoyancy underwater. It allows divers to control their ascent and descent by adjusting the amount of air in the device. When a diver wants to rise, they add air to the BC, and when they want to sink, they release air. The BC is typically worn like a vest and is often integrated with other gear, such as a regulator and tank. Proper use of a buoyancy compensator enhances safety and comfort, making it easier for divers to explore underwater environments without expending excessive energy.