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Underwater diving is the practice of descending below the water's surface to conduct underwater activities. In ambient pressure diving, the diver is exposed to the pressure of the surrounding water, and uses breathing apparatus for scuba diving or surface supplied diving, or when freediving, will breath-hold. The saturation diving technique reduces the risk of decompression sickness after long duration deep dives.
A Navy diver submerged 2,000 feet, setting a record using the new Atmospheric Diving System (ADS) suit, off the coast of La Jolla, Calif., Aug. 1.. 609.6 m. SCUBA diving is defined as diving underwater with a self-contained Breathing Apparatus.