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Hi Wrolf,
The deepest of the 5 or 6 OC scuba dives I have done in the last 3 years
was to 100 feet for a bottom time of 10 minutes. I did deep stops, never
got within 40 feet of my ceiling (ala EDGE), and spent nearly 30 minutes
at 15 feet. I *STILL* felt miserable that night and the next morning. It
was a very familiar misery - fatigue, stiffness, etc. I don't think it's
the N2 so much as I think it is the increased O2 on deco that we
mixed-gas types now tend to use that seems to make the symptoms go away.
Aloha,
Rich
On Wed, 3 Sep 1997 Wrolf.Courtney@do*.co* wrote:
>
>
> deepreef@bi*.bi*.ha*.or* wrote on 09/02/97:
> >Everytime I go deeper than 100 feet on air I feel like shit that night
> >and the next morning. I realized that I always felt that way before, but
> >just figured it was related to diving in general. I don't feel that way
> >at all with the helium - not even after the days where I do two deep
> >ones, and even on dives when the PN2 is greater than it is for air at
> 100-130. I don't think it's the presence of >helium as much as it is the
> elevated O2 on deco.
>
> I felt that I mostly licked my "feel like shit" problem by hanging below
> the ceiling
> shown on my Suunto Solution. Of course, that also slows down the rate that
> the Solution
> thinks I am off gassing at, so I wind up with both less deco stress by
> being below the
> ceiling, and more deco.
>
> More efficient deco gas seems to have the same effect.
>
> For DCIEM table 1S dives, I add a five minute safety stop to the deepest
> stop. Since
> table 1S only covers required stops at 10' and 20', I know that I cannot be
> significantly
> on gassing.
>
> I go by the assumption that "tiny bubbles" is real, but the empirical
> testing has all been
> done on Haldanean models. So hang deep to let them bubbles bubble out, and
> then do a full
> Buhlmann or DCIEM deco schedule.
>
>
> Wrolf
>
>
>
Richard Pyle
Ichthyology, Bishop Museum deepreef@bi*.bi*.ha*.or*
1525 Bernice St. PH: (808) 848-4115
Honolulu, HI 96817-0916 FAX: (808) 841-8968
"The views are those of the sender and not of Bishop Museum"
--
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