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which combination of gases used divers in sea
Much interest in the use of mixed breathing gases, across a spectrum of diving, has errupted in the past few years or so, mostly in mixtures of nitrogen and oxygen that differ from pure air, and especially those with higher oxygen content than air, termed enriched, which can be employed efficiently in shallow diving. Non-enriched mixtures of nitrogen/oxygen (nitrox), helium/oxygen (heliox), and helium/nitrogen/oxygen (trimix), of course, have long been employed commercially in deep and saturation diving. Recently, mixtures of hydrogen/oxygen (hydrox) have also been tested.


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