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I guess, Trey uses his experience, a little intuition plus the use of
certain exponential polynomial equations to determine the behavior of
the gas loadings generated by his software planners !

Zeca

Scott Gudmundsen wrote:
> 
> Phi,
> 
> Best post I've read for several months! Thank you for sharing!
> 
> I've often wondered how the heck he does that, too. Apparently George's
> brain is programmed for numbers and tables anyway, as he's some kind of
> financial/stock broker type number cruncher when his hair is drying and his
> tanks are filling... maybe he'll tell us what he does to pay for helium once
> he reads this post!
> 
> Scott Gudmundsen
> Vernal, Utah
> 
> ----- Original Message -----
> From: Phi Le <phi@sk*.be*>
> To: List - Technical Diver <techdiver@aquanaut.com>
> Sent: Sunday, April 23, 2000 4:50 PM
> Subject: Deco in your head ?
> 
> > I am sure a lot of people already done it, but just want to share
> something
> > for the guys haven't yet...
> >
> > A while back, George was posting about he had somehow calculated his deco
> > schedule in his head *while* decoing in the water. I thought to myself
> "How
> > the hell do I learn how to do that ?"
> >
> > And I still haven't a clue until I did a little project over the Easter
> > week-end with the GUE Decoplanner. I wanted to create a set of trimix
> tables
> > so I don't have to fire up the laptop everytime I need to calculate the
> deco
> > schedule.
> >
> > So I decided on a fix MOD PPO2 (1.2), a fix END (30m) and fix 2 deco gases
> > (50, 100%) to be used independently of MOD. For each increment of 5m from
> 50
> > to 100m, I calculated the deco schedule for different BT in increments of
> 5
> > min. I also generated alternative schedules for each step if I had lost
> one
> > of the deco gases. In addition, I generated tables for each BT gas at PPO2
> > of 1.4 (10m more) in case of needing to go deeper for whatever reason.
> >
> > After a while, I could "guestimate" the deco schedule of the next depth or
> > BT increment pretty accurately.
> >
> > I am not saying that I could calculate my schedule in my head like George,
> > but if I had dropped the deco table (done it before) I could whip out
> > another table for another depth or time, estimate it accurately and not be
> a
> > decoweenie. And I feel that I only need to memorize 2 or 3 tables and
> could
> > inter/extrapolate the rest easily.
> >
> > I guess the tough part will be when I add a third deco gas for the deeper
> > dive. Wonder how that would affect everything so far ?
> >
> > If you see any flaws, please comment.
> >
> > -Phi
> >
> > --
> > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
> > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
> >
> 
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