Scuba divers carry their own source of breathing gas, usually compressed air, affording them greater independence and movement than surface-supplied divers, and more time underwater than free divers. Lambertsen in a patent submitted in 1952. The name "scuba", an acronym for " Self-Contained Underwater Breathing Apparatus", was coined by Christian J. Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface air supply, and therefore has a limited but variable endurance. Recreational scuba diver The undersea kelp forest of Ana Capa off of the coast of Oxnard, California Diver looking at a shipwreck in the Caribbean Sea. Swimming underwater, breathing gas carried by the diver
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