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> There's no real need in open water for > nitrox, except for commercial or teaching > exposures. Oh really....so I should be doing my 4-hour 60-foot reef dives on air then? > The mixtures you're taking about > aren't enough for deco. I missed which nitrox mixtures were being talked about, but I use everything from air to nitrox-50 to breathe during decompression from 300-450' trimix dives in open water. I mostly prefer Nitrox-32 for a variety of reasons. Which mixtures aren't enough for deco? > The problem is that those who teach it > don't bother to tell the whole story, or > require the kind of examinations that would > shed some light on one's ability to tolerate > the stuff, or screen their students, or teach > the right partial pressures to dive nitrox, or > fully understand the counterindications for > using nitrox. Hmmm... contraindications for nitrox? What might they be? Predisposition to O2 toxicity? How would one go about determining his/her level of predisposition? Kinda tough, since variation within individuals seems to equal (more or less) variation between individuals. What examinations are you referring to? What's the whole story? Aloha, Rich Richard Pyle deepreef@bi*.bi*.ha*.or* ******************************************************************* "WHATEVER happens to you when you willingly go underwater is COMPLETELY and ENTIRELY your own responsibility! If you cannot accept this responsibility, stay out of the water!" *******************************************************************
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