Alternate air source

Alternate air source

A device a diver can use in place of the primary regulator, in order to make an ascent while still breathing normally.

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Part of Speech: noun
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Industry/Domain: Sports
Category: Scuba diving
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Related terms

alternate air source

Fire safety; Prevention & protection

A secondary air supply source system that involves an alternate second-stage regulator provided by either a separate dedicated second-stage or a multipurpose second-stage ...

alternate air source

Sports; Scuba diving

A device a diver can use in place of the primary regulator, in order to make an ascent while still breathing normally.

immersion hypothermia

Sports; Scuba diving

The lowering of body temperature when a diver is fully immersed in cold water without proper thermal protection.

hookah

Sports; Scuba diving

A surface-supplied compressed air apparatus, for use in shallow diving in calm waters. The air is delivered to one or more divers through a long hose.

rebreather

Sports; Scuba diving

A closed-circuit system which filters exhaled air, then recirculates it for rebreathing by the diver; requires special training and maintenance.

high pressure nervous syndrome (HPNS)

Sports; Scuba diving

A condition which results from breathing Helium under high pressures. Early symptoms of HPNS are sometimes seen as shallow as 300FSW but more commonly over 600FSW. The severity ...