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From: "Taylor, John" <john.taylor@cs*.co*.uk*>
To: Tech Diver <techdiver@aquanaut.com>
Subject: RE: Abyss Explorer Nitrox
Date: Mon, 17 May 1999 03:37:13 -0400
Hallelujah, Brothers and Sisters!


JT
--
John Taylor, Marketing and Trading Systems, IT Development
Credit Suisse Financial Products (Hong Kong) Ltd, 13F, Tower 3, Exchange
Square, Central, Hong Kong
Office: +852 2101 6927, Fax: +852 2101 7698, Mobile: +852 9031 6395, email:
john.taylor@cs*.co*.uk* [private e-mail: live4diving@ho*.co*]


> -----Original Message-----
> From:	Jim Cobb [SMTP:cobber@ci*.co*]
> Sent:	Sunday, May 16, 1999 6:39 AM
> To:	Case; Tech Diver
> Subject:	Re: Abyss Explorer Nitrox
> 
> Uh, Case, are you using the old sherwood wind-up bottom timers to avoid 
> this problem?
> 
>  Jim
> 
> Sender: Case  Date: 5/15/99 11:40 AM
> 
> >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*
> >  {   \___----~~'              `~~-_   
> >   \                         /// `  `~.           ___  Oo
> >   / /~~~~-, ,__.    ,      ///  __,,,,)         (___)o_o
> >   \/      \/    `~~~;   ,---~~-_`~=        //====--//(_)
> >                    /   /                           \\ ^ 
> >                   '._.'   Deep...Professional...The Standard!
> >--
> >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
> >
> 
> 
>  -------------------------------------------------------------------
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> 
> 
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