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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. 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. So while I do beleive trimix is the only deep diving gas it does have some risk associated with it as well. I would call it the ideal even perfect deep diving gas (next to possible neon, which is cost prohibitive) but I would not refer to any inert gas a freindly from a deco standpoint. Tom Mount 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. I personally have used it some but prefer proplanner and voyager. You wrote: > >> >> 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. >-- >Send mail for the `techdiver' mailing list to `techdiver@terra.net'. >Send subscription/archive requests to `techdiver-request@terra.net'. >
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