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Date: Mon, 28 Oct 1996 11:00:30 -0700 (MST)
To: techdiver@terra.net
From: "Christopher M. Parrett" <chris@ab*.co*>
Subject: Re: Deep Stops
At 09:01 PM 10/26/96 -1000, you wrote:
>
>This is what I meant by the "Signal to noise" thing.  Chris said "when 
>following the model" when he was talking about the longer shallower 
>stops.  I've had many long conversations with him about deep stops, and 
>he understands them. Hence, your senseless bashing is just noise.  NOBODY, 
>not even you, advocates deep stops as strongly as I do.  I was doing them 
>ten years ago.  I don't know why they work - I know that the evidence 
>points to bubbles, but I'm not about to fall into the same trap that 
>weenies who religeously follow their compartment models did by assuming we 
>"know" something that we do not.  Yes, deep stops should be "required" 
>stops, just as "safety stops" from no-D dives should be considered 
>"required" stops.  It's probably the same underlying principle for both.

No doubt about it from our standpoint.
BUBBLES are the Issue!
The problem is in getting a "Model" to generate them as part of the model,
and NOT as a arbitrary insertion.
Just adding the deep stops is simple.
I am after a model that predicts the neccesity of the stops being there to
begin with.

>
>Chris, a more constructive suggestion is that yes, compartment models can 
>very easily give better shapes to deco profiles.  All you have to do is 
>lower the M-values of the faster compartments. Yes, this will shorten 
>"no-D" time, but as you well-know, there really is no such thing as a 
>"no-D" dive.  What it will do for many traditional no-D profiles is add 
>some short shallow stops, which look suspisciously like "Safety stops".
>

Agreed.
THERE IS NO SUCH THING AS A NO DECOMPRESSION DIVE!!!

We started working on some new numbers over the weekend with the RGBM side
of Abyss.
Bruce Weinke has sent us some new data that will have a "potentialy"
significant impact on the repetitive side of our diving.
Should have some interesting results in the next week or so.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Christopher M. Parrett, President
Abysmal Diving Inc. 6595 Odell Place, Suite G. Boulder CO, 80301 USA

Makers of ABYSS, Advanced Dive Planning Software.

Phone: (303) 530-7248  Fax:   (303) 530-2808

File Transfer Site:  ftp://ftp.abysmal.com/pub/abysmal
World Wide Web Site: http://WWW.ABYSMAL.COM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Rule #1   If We Don't Take Care Of The Customer.....Somebody Else Will.
"Its not so much what we do, but how we do it that really matters."

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