Post by geriatrix on Sept 10, 2015 14:30:26 GMT
Deep sea diving is generally performed with the aid of a breathing apparatus. Scuba (an acronym for Self-Contained Underwater Breathing Apparatus) is a system that delivers air to the diver at the same pressure exerted by the surrounding water. Most scuba divers limit their descent to about 130 ft (40 m), though certain record setters have reached depths of 300 ft (91 m) or more. At depths beyond 130 ft, nitrogen narcosis may set in.
