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Back when I only dived air, my min gas time was very close to my NDL time at most depths between 20-ish and 30-ish meters. These days, when I have basically standardized on EAN32, my NDL is roughly 1.5 times my min gas time.For those who are risk adverse.
Even where the dives are not limited by the limits of the NDL time, i.e. where available gas is the limiting factor. Using Nitrox increases the 'safety' buffer, if Nitrox is the breathing gas but the NDL for air is applied.
Not only that it makes life underwater a lot easier (monitor my gas, don't care about NDL), I get shorter SIs and/or increased bottom time on my 2nd and possibly 3rd dive of the day. Win-win. I love EAN32. And that's not considering the fact that I'm one of those who believe that I feel less fatigued after 2-3 long/deep (by NDL standards) dives on nitrox than I do after 2-3 long/deep dives on air.