No piece of dive gear needs to multi-task more than a Buoyancy Compensator. It has to secure tank, hoses and accessories. It must support weight pouches and cargo pockets and still maintain a streamlined profile. It has to enable you to safely control your ascents and descents, and afford relatively comfortable surface flotation. That’s a tall order. Clearly, no one BC can hit all the marks for all divers in all diving conditions. But if you can identify where you spend most of your wet-time, it’s not so hard to find a BC with your name on it.