The only reason I do it that way is that it is extremely easy with a
rebreather.  If I was still diving OC, I'd not waste my time with helium
shallower than about 150 or so.

Aloha,
Rich

On Thu, 19 Aug 1999, Chris Werner wrote:

> 
> ----- Original Message -----
> From: Richard Pyle <deepreef@bi*.or*>
> > If you really wanted to be conservative, then you might drop maximum Pnarc
> > to 4.0 atm, and require helium on all dives deeper than 100 fsw.  I might
> > be in favor of that, as it is more or less the route I have taken on my
> > own dives.
> >
> 
> Richie, I hate to have to do this but, I agree with you. The limit should be
> somewhere around this value. This is what we are practicing and it is good
> to see others that are actually diving, adopting this same type of SOP. No
> matter how you came about it. It is better for narcosis and for deco. While
> I don't use air at all, an EAD of 100' is my absolute limit on narcosis. It
> appears as those who do little or no deep/cave diving are the ones who are
> consistently pushing the limits. Those of us who are consistently diving
> every week have already figured this one out. It is a shame that those who
> give the advice have not come to the same conclusions.
> 
> Chris
> 
> 
> 

Richard Pyle
Ichthyology, Bishop Museum                deepreef@bi*.or*
1525 Bernice St.                          PH: (808) 848-4115
Honolulu, HI 96817-2704                   FAX: (808) 847-8252

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