What are the limitations or problems of using nitrox?
There are a few limitations when using nitrox, however, these are not, IMHO, justifications for banning the use of nitrox. 1. Concrete maximum operating depth (MOD) and risk of acute/CNS oxygen toxicity (see questions [8 – 10]). However, the risk of acute oxygen toxicity with nitrox is no greater than that with air. The difference is the changed priority between nitrogen and oxygen. On air, nitrogen narcosis is generally the governing factor in choosing a maximum depth for most sport divers. There are two advantages to having nitrogen narcosis as your governing factor; the first is that it gradually increases with depth and up to a point you can take action to reduce it (ie ascend), the second is that if deep water blackout occurs the victim’s regulator tends to stay in place. However, if you continue down to depths in excess of 200 fsw (66 msw) on air you carry a significant risk of an acute O2 attack. On nitrox, the risk of an acute O2 attack may be the same or higher than the risk f
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