Scuba Diving for Beginners : Varieties of Air for Scuba Diving

Scuba Diving for Beginners : Varieties of Air for Scuba Diving


Hi, I’m Cole from Expert Village, and I’m
going to be talking about the different types of air divers breathe. Standard air with most
kinds of for most divers and most dive operations is basically the same air you breathe everyday,
only dried and filtered. Roughly twenty-one percent oxygen, seventy-nine percent nitrogen.
Different kinds of air would also include enriched air, or nitrox diving, which is anything
higher than twenty-one percent oxygen up to forty percent oxygen. And beyond enriched
air there is also trimix gases, which supplement some of the nitrogen with helium and what
that does is basically counteract the effects of nitrogen narcosis.

5 thoughts on “Scuba Diving for Beginners : Varieties of Air for Scuba Diving

  1. Any mixture becomes toxic eventually but the upper limit is generally regarded as a partial pressure of O2 of 1.6 bar. Pure oxygen can therefore only be used to a depth of 6 metres, not 66. Beyond 6m you will need air, nitrox, heliox or trimix where the ppO2 can be kept at the 'working' limit of 1.4 bar ppO2.

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