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From: "Doug Chapman" <dougch@ea*.ne*>
To: <techdiver@aquanaut.com>
Subject: Re: Deco Planning Software
Date: Fri, 4 Apr 2003 07:47:54 -0500
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>Looking for deco planning software.  What is everyone using?
>
>Richard


Richard,
Can't speak for everyone but I would recommend you check out Deco =
Planner, marketed by GUE. It follows Buhlmann ZH16B or ZH16C theory (you =
select). It allows you to add the Buhlmann depth safety factor and =
designate the last stop at 20 ft rather than the 10ft norm. Note if you =
want to use 15ft as your last stop you leave the last stop setting at 10 =
ft and inject a 15ft stop until a 10ft requirement goes away; however =
you will find on O2 deco the difference between 20ft and 15ft as a last =
stop is not very significant. Decoplanner follows Buhlmann's theory and =
accounts for multiple gas switches up and down (counterdiffusion). A =
significant feature is it also allows you to change the gradient factor =
slope along the deco profile to force deeper stops which have been =
demonstrated to be beneficial on deeper dives. You can leave the =
gradient settings at the default and it does a statistically reasonable =
job as well. You can inject your own stops along the way and it will =
account for them. Decoplanner appears to use the Repex method or some =
mod thereof (I haven't verified) of calculating O2 exposure/limit. For =
relatively short dives this seems to be sufficient; however on more =
aggressive dives you will always be against or past the stops on this =
method on Decoplanner. So I consider the O2 information in Decoplanner =
as more information for developing the total dive plan. It provides =
required gas volumes for your bottom and deco mixes based on your RMV =
(again for guidance IMHO). It also produces nifty charts for individual =
tissue compartment gas tensions, if you are into that sort of thing. =
There are dive planning features that print a range of dive options. The =
spreadsheet format is intuitive, flexible, and easy to modify (you don't =
have to start the planning over if you want to change a number. The =
manual is well written and reasonably complete.

I've used Abyss, Proplanner, Dr. X , Decoplanner, and my own code to =
generate profiles. IMHO Decoplanner encompasses the range of features =
most divers will ever use and sells for a reasonable cost as well.IMHO.

Take care,
Doug Chapman

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<DIV><FONT face=3DArial>>Looking for deco planning software.  =
What is=20
everyone using?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>>Richard</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Richard,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Can't speak for everyone but I would =
recommend you=20
check out Deco Planner, marketed by GUE. It follows Buhlmann ZH16B or =
ZH16C=20
theory (you select). It allows you to add the Buhlmann depth safety =
factor and=20
designate the last stop at 20 ft rather than the 10ft norm. Note if you =
want to=20
use 15ft as your last stop you leave the last stop setting at 10 =
ft and=20
inject a 15ft stop until a 10ft requirement goes away; however you will =
find on=20
O2 deco the difference between 20ft and 15ft as a last stop is not very=20
significant. Decoplanner follows Buhlmann's theory and accounts for =
multiple gas=20
switches up and down (counterdiffusion). A significant feature is it =
also allows=20
you to change the gradient factor slope along the deco profile to force =
deeper=20
stops which have been demonstrated to be beneficial on deeper dives. You =
can=20
leave the gradient settings at the default and it does a statistically=20
reasonable job as well. You can inject your own stops along the way =
and it=20
will account for them. Decoplanner appears to use the Repex method or =
some mod=20
thereof (I haven't verified) of calculating O2 exposure/limit. For =
relatively=20
short dives this seems to be sufficient; however on more aggressive =
dives you=20
will always be against or past the stops on this method on Decoplanner. =
So I=20
consider the O2 information in Decoplanner as more information for =
developing=20
the total dive plan. It provides required gas volumes for your bottom =
and deco=20
mixes based on your RMV (again for guidance IMHO). It also produces =
nifty charts=20
for individual tissue compartment gas tensions, if you are into that =
sort of=20
thing. There are dive planning features that print a range of dive =
options. The=20
spreadsheet format is intuitive, flexible, and easy to modify (you =
don't=20
have to start the planning over if you want to change a number. The =
manual is=20
well written and reasonably complete.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I've used Abyss, Proplanner, Dr. X , =
Decoplanner,=20
and my own code to generate profiles. IMHO Decoplanner encompasses the =
range of=20
features most divers will ever use and sells for a reasonable cost =
as=20
well.IMHO.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Take care,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Doug Chapman</FONT></DIV>
<DIV> </DIV></BODY></HTML>

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