Dave, as you know I don't like high PP02's in the bottom mix. I like 1.2 max
or less. There is a difference between the working part of the dive when
your lungs are working out and when at rest in deco. My personal experience
is that I can feel it during and after a dive if my bottom mix is much over
1.3. I feel much better during and after a dive if I do my high PP02 portion
of the dive during the deco rather than at the bottom.

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

> From: "David B. Widen" <dwiden@TW*.co*>
> Date: Tue, 10 Oct 2000 21:05:35 -0400
> To: Jim Cobb <cobber@ci*.co*>, stuart.morrison@sw*.co*.uk*,
> dmdalton@qu*.ne*
> Cc: dwiden@ho*.co*, donburke56@ne*.ne*, Bakalite@ba*.co*,
> techdiver@aquanaut.com
> Subject: RE: rec trimix
> 
> Jim
> 
> I do not understand the position you have on the Nitrox and not being safety
> for recreational dives but it is fine as a deco gas????
> 
> It is okay to jack up the PO2 with Trimix but not with N2 only???
> 
> Please explain.
> 
> David
> 
> -----Original Message-----
> From: Jim Cobb [mailto:cobber@ci*.co*]
> Sent: Tuesday, October 10, 2000 2:04 PM
> To: stuart.morrison@sw*.co*.uk*; dmdalton@qu*.ne*
> Cc: dwiden@ho*.co*; donburke56@ne*.ne*; Bakalite@ba*.co*;
> techdiver@aquanaut.com
> Subject: Re: rec trimix
> 
> 
> I tend to put divers into 2 groups. One I call the "80 & bolt" crowd, this
> is where you take an aluminum 80, fill it with air, slap it onto your back,
> jump in the water and when you run out of air bolt to the surface. Hundreds
> of dive operations around the world use this technique as it is idiot proof
> and almost impossible to get bent.
> 
> Beyond that is technical diving. This is where a diver gets to the point
> that you can't simply head to the surface when if you run out of air or have
> other problems. When you do this you need to have special equipment,
> procedures and experience. It is very expensive.
> 
> Nitrox diving is a sort of quasi-tech diving where folks are trying to do
> what tech divers do without paying the piper. But what people don't realize
> that the decision to use high PP02's is exacting a price. The price is that
> you are increasing the likelihood of your getting killed or damaging your
> lungs for the sake a few minutes of bottom time.
> 
> And what is the point of that? About the only thing I can say good about
> nitrox training is that it teaches you the fundamentals of mixing gas. Other
> than that you might as well do trimix at the same time and at least do
> something to make your dive safer, not less safe.
> 
> Jim
> -------------------------------------------------------------------
> Learn About Trimix at http://www.cisatlantic.com/trimix/
> 
>> From: stuart.morrison@sw*.co*.uk*
>> Date: Tue, 10 Oct 2000 15:10:39 +0000
>> To: cobber@ci*.co*, dmdalton@qu*.ne*
>> Cc: dwiden@ho*.co*, donburke56@ne*.ne*, Bakalite@ba*.co*,
>> techdiver@aquanaut.com
>> Subject: RE: rec trimix
>> 
>> Jim,
>> 
>>> if you need to spend more time down
>>> there then you need
>>> to do it right with doubles and a deco plan
>> 
>> at last someone talking sense, trimix on single bottles, recreational
>> trimix certs, no-deco gas diving tables... what next - fat tourists in
>> lycra skins trying to work out gas dives on the wheel, wearing Zeagle
>> BCD's and black snorkles and trying to find somewhere to stuff their
>> Spare Air? We are talking about a community that cannot change a finstrap
>> without taking a training course first. It's a noble aim to "save" rec
>> divers from narcosis, but this is not the answer, it's a quick fix, it is
>> not a solution. If you dive gas then dive it properly, this is beyond the
>> realm of recreational diving.
>> 
>> 
>> 
>> Visit our web site at www.scott-wilson.com
>> 
>> Privilege and Confidentiality Notice.
>> This e-mail and any attachments to it are intended only for the party
>> to whom they are addressed.  They may contain privileged and/or
>> confidential information.  If you have received this transmission in
>> error, please notify the sender immediately and delete any digital
>> copies and destroy any paper copies.
>> Thank you.
>> 
>> 
>> Scott Wilson Scotland Ltd
>> Registered in Scotland No. 48951,
>> Registered Office: 6 Park Circus, Glasgow, G3 6AX. UK.
>> 
>> 
>> ________________________________________________________________________
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> 
> 


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