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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 ...
Another one of the key scuba diving safety rules. As you ascend you are ridding your body of nitrogen in your tissues and bloodstream. If you ascend too quickly, you risk the bends or decompression sickness. You should not ascend more than 30 feet per minute.