Diving rebreathers have applications for primary and emergency gas supply.

The same technology on a submersible or surface installation is more likely to be referred to as a life-support system.ĭiving rebreather technology may be used where breathing gas supply is limited, or where the breathing gas is specially enriched or contains expensive components, such as helium diluent. A semi-closed rebreather carried by the diver may also be known as a gas extender. A diving rebreather is generally understood to be a portable unit carried by the user, and is therefore a type of self-contained underwater breathing apparatus (scuba). The purpose is to extend the breathing endurance of a limited gas supply, and, for covert military use by frogmen or observation of underwater life, to eliminate the bubbles produced by an open circuit system. This differs from open-circuit breathing apparatus, where the exhaled gas is discharged directly into the environment. Oxygen is added to replenish the amount metabolised by the diver. A fully closed circuit electronic rebreather ( AP Diving Inspiration)ĬCUBA (closed circuit underwater breathing apparatus) CCR (closed circuit rebreather), SCR (semi-closed rebreather)Ī Diving rebreather is an underwater breathing apparatus that absorbs the carbon dioxide of a diver's exhaled breath to permit the rebreathing (recycling) of the substantially unused oxygen content, and unused inert content when present, of each breath.

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