I got PFO tested 12 years ago. JJ and I both played sports all our lives and
neither of us ever stopped conditioning after that. I even played
professional for a few years after college and have always stayed in shape.
When I started cave diving I went to working out every day, and then to
twice per day a few years ago.


I have gotten mild bends on air dives way back when, just pain hits that
went away fast and sub clinical stuff, like feeling real tired, which I
consider to be DCS and I have gotten slobitis when I let my body fat go up
and at the same time missed deep stops or flooded my dry suit, but the big
fact is that you have all seen my deco schedules and can see that on the big
ones, I have a no hit record. Also, on Doppler, I clear totally in 30
minutes following a dive -the most important thing we have found about
conditioning. Many of our divers , like John Rose for example, never get
above a grade one bubble reading - he is a competitive Masters Swimmer.

-----Original Message-----
From: Don Hoover [mailto:Don.Hoover@ds*.co*]
Sent: Thursday, November 02, 2000 7:59 AM
To: trey@ne*.co*; NPerry255@ao*.co*; techdiver@aquanaut.com
Cc: GUE_Lista
Subject: Recreational Tech. Diving


George, JJ:

Did you  maintained a physical conditioning (i.e. running/cycling journal,
strength training, mile of swimming ect.) log that could be correlated to
your decompression dives and Doppler examinations? Has Dr. Hamilton examined
this relationship.  The reason I am curious is that PADI will launch their
"Recreational Tech. Diver" program next year and I have friends who will be
training interested individuals.  I explained to them the other day how
important physical conditioning, proper physical examinations of students
(PFO examinations, stress test ect.), diet,  and understanding of
decompression diving and gas mixing will be to their students. Neither are
Tech divers now but work for a shop that is TDI certified and is training
them.  I asked them what happens to their liability if they have someone
stroke out because he/she had a PFO, only dives 5 times a
year(recreationally) and did not maintain proper physical condition.  They
had a blank look on their face.  I am very concerned about the sophomoric
divers who think this is just another form of recreational diving.


-----Original Message-----
From: trey@ne*.co* [mailto:trey@ne*.co*]
Sent: Thursday, November 02, 2000 6:01 AM
To: NPerry255@ao*.co*; techdiver@aquanaut.com
Cc: GUE_Lista
Subject: RE: DIR clarification


Nelson, we originally went to Hamilton Research for custom trimix tables.
Dr. Bill Hamilton is a physiologist and worked in oil company and other
environments where mixed gas tables were first employed. What he developed
for WKPP dives were initially very long schedules, which actually helped our
gear thinking since Bill Gavin wanted to speed up the dives as much as
possible to avoid the long decompressions first believed to be necessary. He
and I could add and survey 1000 feet of line every six minutes.

When Parker died I became the one who interacted with Dr. Bill and we used
me as the test subject for shortening the tables and changing the shape, the
depth of the stops, and the gasses used. I boosted the helium , again quite
by accident as I was also the survey guy, so I needed to be mathematically
clearer. Suddenly I could do a whole lot less deco - the fist thing that was
counter to conventional wisdom on helium. I could find no deco that worked
reliably for weak mixes or air. Gavin and I tweaked the tables repeatedly by
using software containing Bulhmann, but giving it false values for helium
and oxygen percentages, like telling it the helium was lower and the oxygen
higher than it was to get the right shape we believed was better - it was.

We changed from using 40% and O2 to inserting a 50% bottle to make the
intermediate stops more effective, and then started using the 190 bottle for
deep stops. This JJ and I converted to 19X35 after several iterations. Then
JJ started adding helium to the 120 bottle. I axed the intermediate stops
way back in concert with Hamilton's recommendations and we just smoothed it
out until we found the ideals using Doppler and me and JJ as a test case .
JJ and I would hang around by the water in our dry suits in case we had to
get back in, and get bubble checked until clear.

The deco development down to reasonable schedules and techniques that work
across the spectrum is one of our biggest contributions to tech diving, and
trust me we got nothing but badmouthed and were fought all the way on that
one. Notice now the Dr. Weinke and NAUI have now corroborated our results
using the chamber at Los Alamos and sophisticated tracking techniques.
Notice they also allow teaching of DIR.



-----Original Message-----
From: NPerry255@ao*.co* [mailto:NPerry255@ao*.co*]
Sent: Wednesday, November 01, 2000 9:27 PM
To: trey@ne*.co*; techdiver@aquanaut.com
Subject: Re: DIR clarification


    Thanks for the historical perspective (always wondered about
"Hogarth!");
it makes the posts more informative... Probably many List divers (inc. me)
don't personally aspire to the extreme pioneer exploration that WKPP does:
but your success and the knowledge gained -- and shared -- benefits the
whole
tech diving community.  Particularly important are the radical changes in
decompression theory AND application, which you & JJ have put to the test.
(On a small level, it was from the List that I learned to use 50% O2 (not
36%), pick a lower END (90') and incorporate proper deep stops (GUE Deco
Planner or RGBM).  Safe diving,
    Nelson


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