Originally posted by simon66
[B
What i refer to is the equivalent air depths
i.e a dive to a max depth of 40 metres on a Ean 32 mix at a ppo2 of 1.6 for a max time of 45 minutes would give you an equivalent air depth of 33 metres .
simon . [/B]
I do understand that you are talking about the equivalent airdeapth, but there is a problem when you max out the values like you have in your example.
45 minutes on a pp02 1.6 ? do you realy like that ? I am not going to start a holywar on anything and calculate things,
but as I remember it 1,4 is the recomended (and some even recomend lower values than that) pp02 value where 1,6 is the absolute maximum value. Add the absolute maximum time at that deapth and you will understand that it migh not be so smart to risk CNS toxicity or burnt out lungs. shure it shouldnt happen you are within the limits, but still same thing happens with DCS. you shouldnt get it you are within the limits but oups you got it anyhow.
We where talking about the nitrogen narcosis and as I stated, I would be able to make an educated guess why ppl are less narked (se my last posting) when diving nitrox. But I also stated that there are other things that increase the risks with that dive.
I might be out of bounds here but it feels that you choose between getting nitrogen narked or getting nitrogen narked AND CNS toxicity and/or burntout lungs
The choice is whether you will get drunk and do something stupid that might kost you your life (deep on air ) or you will get less drunk and tie a shotgun to your head then risk shooting it off (same real depth on nitrox)
Hope you understand what I am trying to tell you
if you now have nitrox and wants to go down deep, then why not make heliox out of it instead ? (of course get the right training first)
point stands you dont get down deep on nitrox, you buy time with nitrox but not depth.