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A buoyancy compensator (BC), also called a buoyancy control device (BCD), stabilizer, stabilisor, stab jacket, wing or adjustable buoyancy life jacket (ABLJ), depending on design, is a type of diving equipment which is worn by divers to establish neutral buoyancy underwater and positive buoyancy at the surface, when needed.
A further requirement for scuba diving in most circumstances, is the ability to achieve significant positive buoyancy at any point of a dive. [3] [5] [6] When at the surface, this is a standard procedure to enhance safety and convenience, and underwater it is generally a response to an emergency.
Fenzy is a scuba diving and industrial breathing equipment design and manufacturing firm. It started in or before 1920 in France. Finally Honeywell bought them out.. In 1961 the company's founder and owner, Maurice Fenzy, invented a divers' adjustable buoyancy life jacket (ABLJ) (European terminology) or buoyancy compensator (BC) (North American terminology) [1] that became so well known that ...
The wide variety of types of buoyancy compensator, diving suits and types of scuba equipment means that it is important for each buddy to understand the other's equipment configuration in case one has to help or rescue the other. The buddy check is a last minute opportunity to become familiar with the dive buddy's equipment.
Rebreather diving, closed-circuit or semi-closed-circuit scuba; Freediving or breathhold diving, where the diver completes the dive on a single breath of air taken at the surface before the dive. Snorkelling allows breathing at the surface with the face submerged, and is used as an adjunct to free diving and scuba.
A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving.The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure and deliver it to the diver, but there are also other types of gas pressure regulator used for diving applications.