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>Posted on 14 Aug 1996 at 01:47:20 by JHEIMANN.US.ORACLE.COM

>I have been thinking about some deep diving in Lake Tahoe, which
>is at an altitude of approx. 6000'.  I know that decompression profiles are
>significantly changed by the reduced atmospheric pressure.  What I have been

>wondering is how depth limits based on PO2s are affected.  At first thought, I
>would think that one could breathe a given mix at a deeper depth than at sea
>level, since the absolute pressure at any given depth is less than at sea
>level.


This smacks of a troll :-).

It's straightforward to express the partial pressure of O2
as a function of depth so I don't see what the problem is ?

You will however have to convince yourself that CNS cumulative
effects are not changed unfavorably due to the reduced predive
gas pressures.

Regards,
John

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