Scuba diving involves swimming underwater using a Self Contained Underwater Breathing Apparatus (SCUBA). Using a cylinder of compressed air to breathe, scuba divers can stay underwater much longer than would be possible by just holding your breath.
Scuba Diving is a non-competitive recreational, underwater activity enjoyed by many people in outdoor bodies of water such as the open sea, inland reservoirs, fresh water gravel pits and specially provided training areas.
Before you set out by yourself, you must receive instruction from a certified trainer. Initial training normally takes place in sheltered water such as a swimming pool.