Bott, you boob, I agree with you 100% on this. I feel better after the dive
if I keep my PPO2 bottom mix 1.2 max.

That ANDI calls nitrox "safeair" is too funny. I know, lets add cyanide to
whiskey and call it "safebooze".

   Jim
 -------------------------------------------------------------------
 Learn About Trimix at http://www.cisatlantic.com/trimix/

> From: Bill Bott <aquadart@ix*.ne*.co*>
> Date: Fri, 21 Jul 2000 17:00:44 -0400
> To: "Shimell, David (shimell)" <shimell@se*.co*>, Manos Manoli
> <manos@ma*.co*.cy*>, Tech Diver <techdiver@aquanaut.com>
> Subject: RE: Table Vs Abyss
> 
> For about the last 4 years now I have been using 21/25 (O2/He) as bottom
> mix for dives from 130' (40 mtrs) down to 170' -180' (52 -55 mtrs).  The
> Idea of using such a high O2 is a through back to the old school of nitrox
> where we were taught a 1.5ata PPO2 for a bottom mix.  I think (I hope)by
> now we know that is a bad idea even in the best of conditions.  Most of the
> people I know now are recommending 1.4ata or less, depending on who you
> talk to.  I am in the "or less" camp!!!  PPO2s of 1.3ata are high enough
> for a bottom mix and less is better still (within reason).


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