Open Circuit

The open circuit scuba system releases exhaled air to the environment, making bubbles! Open circuit scuba is a 1943 invention by the Frenchmen Émile Gagnan and Jacques-Yves Cousteau.

The essential subsystems of an open circuit scuba set are

  • Diving cylinders or “tank”
  • A regulator mechanism to control gas pressure
  • A demand valve with mouthpiece, full-face mask, or helmet, with supply hose, control flow and deliver gas to the diver
  • An exhaust valve system to dispose of used gas (BUBBLES)
  • A harness or other method to attach the set to the diver or “BCD”

Bubbles or Not Diving introduces you to new underwater activities, and can even help you make a career move to become a PADI Professional.

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