Contemporary buoyancy compensator designs have an array of special features that can turn an ordinary buoyancy compensator into an extremely helpful adjunct to the diver's gear.

Buddy Commando jacket

Many designs today will provide straps and padding for integrating the tank with the buoyancy compensator. Some will even have integrated regulators and hose assemblies. The specific size and shape will determine, among other things, where the tank rides on the back. A low-slung tank can be a literal pain in the butt.

Some will make the tank ride higher. That keeps pressure off the base of the spine and makes for a more comfortable dive with less chance of bruising. Backpackers will be familiar with the principle that having the pack higher on the back up to a point makes for an easier haul.

More on Scuba - How to Choose a Buoyancy Compensator – Part II

Buoyancy compensator devices are used to aid the scuba diver to maintain neutral buoyancy.

Buoyancy compensator

'Positive buoyancy' causes the diver to rise, 'negative buoyancy' results in sinking.

Thanks to modern materials science and great product design, buoyancy compensators are better than ever. They come in a variety of styles, sizes and materials - not to mention price range - and have a dozen different built-in helpful devices.

Buoyancy compensators come in three basic styles: wings, jackets or vests.

Wing buoyancy compensators are thinner, lighter-weight wrap-ons that have bladders to trap air filled usually from the main tank. They are easy to travel with and provide good lift.

More on Scuba - How To Choose a Buoyancy Compensator - Part I