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Mike, one more thing --- There is nothing safe about doing any of this. We do it while minimizing the risks but it surely aint safe. Safe and diving just dont go together. regards, jds At 11:38 PM 8/16/1999 -0400, Mike Rodriguez wrote: >At 07:50 PM 8/16/99 -0400, Joel Silverstein wrote: > >Hello Joel, > >>That's not it -- they just dont understand that its not needed. They dont >>understand partial pressures, they dont understand that you dont need a >>hypoxix mix for a 250 fsw dive, > >[SNIP] > >Am I missing something here? A normoxic mix at 250 fsw has a >PO2 of 1.8 AtA. At 19.2% O2, the PO2 is 1.6 AtA and at 16.9% >it's 1.4 AtA. To dive safely at 250 fsw, a hypoxic mix at no >more than 16.9% O2 should be used. > >Now, 16.9% O2 is perfectly breathable all the way from the surface >to the bottom, of course, and reaches a normoxic PO2 just a few >feet below the surface so a travel mix is not needed and doesn't >makes sense on this dive, but the mix *does* have to be hypoxic >to be safe. > >-Mike Rodriguez ><mikey@ma*.co*> > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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