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>Tom Mount wrote:
> 
> Rodney
> You are quite wrong Drx is one of the most widely used software 
> programs around with an outstanding safety record. It is conservative 
> enough for most.

I thought I made reasons clear, but again, DRX safety factors
are are the problem, not the program. It is just a buhlmann,
as are all the rest.

If you set 20% safety on a trimix dive you get 0 safety
for nitrogen, and 20 for helium. The outstanding safety record
is due to the 0% safety still being a buhlmann table.

Remember Sheck ran a trimix course, using DRX, and both his students
got bent. 2 out of 2 ain't bad. Sheck dove air and was fine.
> 
> On helium as a friendly gas, it does off gas quickly but that produces 
> a goods effect provided you do not lose your deco stages and a bad 
> effect if you do lose the deco stages. A simple 300 foot 30 minutes 
> dives can go from a run time of a reasonable duration to over 3,000 
> minutes of deco.

Really? No shit.
I was mainly refering to helium being freindly due to
all the damage high PPN2 does to your body, and that
helium bends are less likely to affect the CNS,
and by all accounts respond better to prompt treatment.
> 
> Sheck used a 20% and deeper than 300 no safety factor and on long dives 
> no safety factor. I do not recall him ever having a problem using the 
> program.
> 

What about those 2 students who got bent.

I personnally would use DRX on 0%, it's when you want
a safety factor that it is a piece of crap.

Rod Nairne.

Rod Nairne wrote:
> >
> >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.
> >
> >If you are fit, you should have no problem
> >with a straight buhlmann.
> >
> >Rod.
> >--
> 


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