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Scuba diving is a form of underwater diving where the diver uses a self-contained underwater breathing apparatus (scuba) which is completely independent of surface supply, to breathe underwater.[1] Scuba divers carry their own source of breathing gas, usually compressed air,[2] allowing them greater independence and freedom of movement than ...
The modern term scuba was originally the acronym SCUBA, which is short for self-contained underwater breathing apparatus. In contemporary usage, scuba as a common noun relates to the practice of recreational diving aided by a two-stage regulator attached to a gas canister (usually air or enriched-air nitrox) affixed to a vest.