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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 ...
A group of up to four scuba divers works together. One of them is the safety diver, who stays close to the down-line and acts as buddy for the other divers. The safety diver watches for hazards such as curious sharks, handles the lines running through the trapeze, and relays signals between divers.