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Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1] The word scuba is an acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent ...
Scuba may also refer to: Scuba diving , swimming underwater while breathing from a gas supply carried by the diver, Scuba, an in-memory database developed by Facebook
Many of the terms are in general use by English speaking divers from many parts of the world, both amateur and professional, and using any of the modes of diving. Others are more specialised, variable by location, mode, or professional environment.
Scuba diving tourism is a growth industry, and it is necessary to consider environmental sustainability, as the expanding impact of divers can adversely affect the marine environment in several ways, and the impact also depends on the specific environment. Tropical coral reefs are more easily damaged by poor diving skills than some temperate ...
Scuba diver of the late 1960s. The history of scuba diving is closely linked with the history of the equipment.By the turn of the twentieth century, two basic architectures for underwater breathing apparatus had been pioneered; open-circuit surface supplied equipment where the diver's exhaled gas is vented directly into the water, and closed-circuit breathing apparatus where the diver's carbon ...
Rebreather diving, closed-circuit or semi-closed-circuit scuba; Freediving or breathhold diving, where the diver completes the dive on a single breath of air taken at the surface before the dive. Snorkelling allows breathing at the surface with the face submerged, and is used as an adjunct to free diving and scuba.
Main article: Underwater habitat An underwater structure inside which divers can carry out dry welding or which is fitted out with life support facilities. Haldanean Haldanian See: Decompression theory#Critical ratio hypothesis Decompression models based on the principles described by John Scott Haldane. half+200 half+15 See: Half + 15 bar An alternative scuba reserve gas management strategy ...
Open-circuit-demand scuba is a 1943 invention by the Frenchmen Émile Gagnan and Jacques-Yves Cousteau, but in the English language Lambertsen's acronym has become common usage and the name Aqua-Lung (often spelled "aqualung"), coined by Cousteau for use in English-speaking countries, [4] has fallen into secondary use.