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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 ...
Most scuba diving, particularly recreational scuba, uses a breathing gas supply mouthpiece which is gripped by the diver's teeth, and which can be dislodged relatively easily by impact. This is generally easily rectified unless the diver is incapacitated, and the associated skills are part of entry-level training.