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From: <bigvon@be*.ne*>
Date: Sat, 15 May 1999 23:13:17 +0000
To: Case <diveman@cy*.co*>
CC: techdiver@aquanaut.com
Subject: Re: Abyss Explorer Nitrox
Aren't bottom timers an "electronic" device?

Case wrote:

> Guys....we're forgetting THE MOST important reason why I'd rather dive
> tables than a computer ..... electronic devices can and will fail
> underwater!  I believe the question was posed as "What is the difference
> between following a deco schedule produced from a set of
> (computer-generated) tables, and following a deco schedule produced by a
> computer on your wrist?"  That's easy....if your 500 MHz Pentium III
> running Z Plan fails while calculating your dive information, chances
> are, you're not underwater in a life threatening situation.... When (not
> IF...but WHEN) your CockRing, or NiTEK (I hate that name!), or any deco
> computer fails in the middle of the dive, you're left with either backup
> tables and a timer, or pulling deco out your butt....
>
> since electronics do fail underwater, why not just skip that whole step
> and rely instead on the computer between your ears and a set of good
> tables....?
>
> -Case
> diveman@cy*.co*
>
> Frank Riffel wrote:
> >
> > "Taylor, John" wrote:
> >
> > > Dear List,
> > >
> > > Please enlighten me:
> > >
> > > What is the difference between following a deco schedule produced from a
set
> > > of (computer-generated) tables, and following a deco schedule produced by
a
> > > computer on your wrist? (Apart from algorithm differences and that the
> > > computer produces a schedule for the dive you actually did)
> >
> > Basicaly none. But you cannot account for deco related issues that are not
> > addressed by the implemented algorithm. I mean which schedule would you
> > follow if you got into strong current and had to expend some work? A table
> > would give you at the chance to select the next deeper/longer schedule a
> > computer won't.
> >
> > My impression is that a computer is nothing worth without a proper planing,
but
> > then where is the advantage? You have to select the right gases, make a gas
> > volume planing, make the deco calculations and tables in any way -- or do
you
> > want to dive without having a contingency table?
> >
> > A thing I worry about is that computers will make divers more slopy. They
allow
> > users to shift away from the "Plan your dive, dive your plan!" paradigm.
> > Also computers give more information than required. Hell, why do I need to
know
> > the current pO2 or CNS% ?  There is enough task loading we don't need such
an
> > information during a dive! You select your gases _before_ to stay out of any
> > tox. problems!
> >
> > Greetings, Frank
> >
> > --
> > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
>
> --
>
>                  \  \
> ^_              \  \                 Case E. Harris
>   \ \             {   \         US Deep Wreck Diving Team
>   {  \           /     `~~~--__   diveman@cy*.co*
>   {   \___----~~'              `~~-_
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>    / /~~~~-, ,__.    ,      ///  __,,,,)         (___)o_o
>    \/      \/    `~~~;   ,---~~-_`~=        //====--//(_)
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>                    '._.'   Deep...Professional...The Standard!
> --
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