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From: Rodney Nairne <troppo@br*.DI*.oz*.au*>
Subject: Re: DR.X safety factor
To: diethard@F1*.te*.ch* (Diethard Wagner - Telekurs Finanz AG - FLCQ)
Date: Sun, 24 Mar 1996 08:37:42 +1000 (EST)
Cc: techdiver@terra.net

> 
> Hi Dr.X Users !
> 
> Can anybody out there tell me,which value of the  safetyfactor
> do YOU use for trimix-dive-plans calculated with dr.x ?
> I know Sheck recommended 100 % or more,but....
> 
> Thanks for your help 
> 
> regards
> 
> Didi
> (Zurich - TDI-Switzerland)
> 

DRX is a piece of crap for trimix dives.

100% safety gives 100 for helium but 0 for
nitrogen. 

Sheck was clearly more concerned with the helium,
but helium is the diver freindly gas, not nitrogen.

Buy/use another program.

I know of one diver who used 130%, with air/02
deco, and he was so long on the deep air stops
he got a nitrogen bend on a trimix dive.

And another who used 30% safety on a nitrox dive,
he did not realise 30% is a straight buhlmann
for a nitrox dive, and got bent too.

If you are fit, you should have no problem
with a straight buhlmann.

Rod.

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