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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.
What is recreational scuba diving? Recreational scuba diving is defined as pleasure diving to a depth of up to 130 feet without decompression stops. Recreational scuba diving has become very popular in the past 20 years. There are almost 9 million certified divers in the United States alone.