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Oooops... When I just re-read my message I see how it makes little sense.... The sentance I am quoting is dealing with recompression techniques.... not open water diving! So my question was simply verifying that all that this meant was that by using approx. 50/50 simply reduces narcosis because both fraction of gases are lowered as opposed to o2 lowering narcosis due to it having less narcotic effect (which the general consensus seems that O2 has the same if not more narcotic effect, even though toxicity would probably occurr before one could experience this!).... On Aug 12, 1996 09:15:07, '"Jeffrey B. Bentley" <ppfkjhb@sn*.be*.co*>' wrote: >> >> Page 195 of "Mixed Gas Diving" (Mount * Giilliam * et al) states "NITROX >> mixes of 50/50 (N2/O2) or 60/40 (N2/O2) are commonly used deeper than 60 >> fsw instead of AIR to lesson narcosis and safely keep the O2 partial >> pressures within tolerance ranges." Does this imply that O2 is less >> narcotic, or that evening out the Fg's keeps both gases below narcotic >> ranges? > > >Slow down big boy... > >High PPO2s are not good. High PPN2 is not good either. The >narcotic effect of O2 compared to N2 is nominal. Only a dumbass >would breath 50% or 60% below 60fsw or almost anywhere.. > >50% and 60% is too weak for accelerated deco and too strong >to be a good travel mix.. Read the whole book again. I have >read this puppy once and did not have these misconceptions.. > >Have you taken any nitrox training yet? I would put it on the >to-do list if not.. > >later, >Jeff
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