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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 ...
Underwater diving. Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. Immersion in water and exposure to high ambient pressure has physiological effects that limit the depths and duration possible in ambient pressure diving.