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-----Original Message-----
From: Jan Werbiñski [mailto:janwer@fo*.co*] 
Sent: Monday, July 14, 2003 12:44 PM
To: techdiver@aquanaut.com
Subject: Re: What ppO2 for bottom mix?

----- Original Message -----
From: "Gary Hagland" <haglandg@to*.co*>
To: <techdiver@aquanaut.com>
Sent: Monday, July 14, 2003 4:00 PM
Subject: Re: What ppO2 for bottom mix?


> Jan,
> Oxtox is a crap shoot.  With the studies that have been done, the only
> constant seems to be its unpredictability.  However, last year in Florida,
> divers convulsed and died at PO2 1.48 and 1.28.  To be honest, don't know
> if there were extenuating circumstances, but it should give us reason to
> question our assumptions that 1.4 is absolutely safe.  Also, I think we
> should acknowledge that the deeper you go, the less chance of a successful
> recovery from one of these incidents.
> Gary

My experience is small so I can be wrong.
I think it's better to set max ppO2 dependend on dive. For a relax dive 1,4
is safe, even 1,5 or 1,6 for a _short_ time (no heavy work of course) can be
OK. For CCR when you have the same ppO2 it's different and 1,3 is probably
the safe limit.

I'm looking for answer why some people say arbitrary something like "always
use standard GUE mix and max ppO2 1,2 or you're stroke" and they claim its
fundamental.


Jan Werbiński       O0oo....._[:]) bul, bul, bul
Strona domowa http://www.janwer.com/ [ http://pa54.zgora.sdi.tpnet.pl/jw/ ]
Nasza sieć http://www.fredry.net/ [ http://pa54.zgora.sdi.tpnet.pl/ ]


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