Greg, for the real long dives the stories on the web page contain the exact
deco stops, and yes, I do them in my head. For a standard dive, there should
be a few available. For a template, Jarrod had his guys work up a software
program, and those guys show up at dives and check everyone and their
schedules to be sure the program is pretty much on track.

 I believe there is a "minimum" deco that must be done, and a "maximum" deco
for each depth. What you see on my dives with Jarrod is the max. If you go
to GUE web site and then to the WKPP dive reports, you will see some of the
"minimum" decos done by me with other partners on short dives, and you will
see the middle ground decos for the longer range setup dives that are done.
There are also archives of our dives and logs,and you can run Jarrod's
software to compare that to those actual dives.

 If you have any questions or want a sample dive, let me know and I will put
it out on here.

 As far as the constant attacks, well this has gone on for years and as you
can see never involves any facts of any kind, and does not even involve
diving now. I have finally turned that over to those whose business it is to
deal with such things, as it has gotten out of hand.

-----Original Message-----
From: Porter, Greg [mailto:Gregory.Porter@AR*.Bo*.co*]
Sent: Thursday, November 02, 2000 1:16 PM
To: 'trey@ne*.co*'
Subject: RE: DIR clarification


George,

The short version is this - I can see the gas configuration WKPP uses at
http://www.wkpp.org/gases.htm , but not the deco times.  Are your deco time
findings available also ?  I've heard (from Ed Pellar, for one) that rather
remarkably you do them in your head.  I see that JJ offers deco software at
GUE so perhaps that's where I should look.  Your input appreciated.

Longer version.  I think the advances pioneered by you and other central
figures at WKPP are tremendous and remarkable.  Standardizing configuration
is a great breakthrough for efficiency and safety.  As time passes the
strengths of DIR will continue to be recognized and embraced.  Detractors
will allways be present, but will diminish as popular opinion swings toward
truth.  The fact that the world was indeed round didn't stop a few with
personal agendas from railing against changing from the flat theory - even
in the face of facts.  So I'm just one voice from a semi-newbie saying
thanks and hoping you'll keep up the effort to share your experiences -
there are a lot of us who recognize it's value and appreciate the
opportunity to learn from it.

Best regards,
Greg Porter

> ----------
> From: 	trey@ne*.co*[SMTP:trey@netdor.com]
> Sent: 	Thursday, November 02, 2000 4:00 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
>
> --
> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
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>

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