Scuba diving

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About Scuba diving

  • Games On This Subject: Scuba Dive

Scuba diving is a form of underwater diving in which a diver uses a scuba set to breathe underwater. Unlike earlier diving, which relied either on breath-hold or on air pumped from the surface, scuba divers carry their own source of breathing gas, (usually compressed air), allowing them greater freedom of movement than with an air line. Both surface supplied and scuba diving allow divers to stay underwater significantly longer than with breath-holding techniques as used in free-diving. A scuba diver usually moves around underwater by using swimfins attached to the feet, but external propulsion can be provided by a diver propulsion vehicle, or a sled pulled from the surface. The first commercially successful scuba sets were the Aqualung twin hose open-circuit units developed by Emile Gagnan and Jacques-Yves Cousteau, in which compressed air carried in back mounted cylinders is inhaled through a demand regulator and then exhaled into the water adjacent to the tank. The single hose two stage scuba regulators of today trace their origins to Australia, where Ted Eldred developed the first example of this typeof regulator, known as the Porpoise, which was developed because patents

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