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.