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From: "Bruce R'. Miller" <brm@yo*.co*>
To: "David Reinhard" <reinhard@oc*.co*.au*>
Cc: "Techdiver" <techdiver@aquanaut.com>
Subject: RE: Last Stop Depth
Date: Mon, 7 Jun 1999 09:10:15 -0700
> 	I have just discovered something of which I found of
> interest and wondered
> if I could get some constructive comments. I have been using
> Zplan set on a
> "last stop depth" of 6m, basically because of greater ease in maintaining

Everyone seems to have missed the point on this one.  Will's implementation
of the last stop depth is not quite what you would expect.  Unlike other
programs, ZPlan seems to rearrange all of the other stops instead of just
the last one.  If you set the Voyager last stop depth to 15 feet, you would
get stops like this: 40 feet, 30, 20, and finally 15.  Do the same thing
with ZPlan and you get stops like these: 45, 35, 25, 15 feet.  So not only
is your last stop deeper, but all of your stops (45 minutes worth, including
deep stops) are 10 feet deeper with a last stop depth of 6m instead of 3m.
That could easily add 15 minutes onto your total time.  The Buhlmann model
is optimized by going as shallow as possible as quickly as possible.

-bruce



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