100days-a-year
Contributor
I don't claim to be smarter than the math wizards who wrote all the software I have but as a devil's advocate I have run tables with every conceivable mix and despite any claims to the contrary I have found that different conditions reward certain mixes and penalize others.FI..32/36 and 80/20 will sometimes get you out sooner,sometimes more He does beget more deco.What I also found was that the differences either way in dives I've done which are <250' and BTs less than 35min amount to less than 5 minutes in most cases.If people would back off those easily disproved claims(I used VPM,Voyager,GAP,ZPlan,MPlan)and concentrate on Rich' posts claims and goals there would be a lot more agreement.Standardization prevents a lot of problems from ever arising.Is it really so important that everyone dive exactly as you do? no, but getting out the info in a combative manner makes it seem that way.It is funny to see that cost is an issue in deco gases that have much less volume used versus back gas which can eat up more He than a deco cylinder can carry.Are the "benefits less important?200cuft of 30/30 equals 60 cuft of he and stages of al40 50o2/50he would have 20cuft and at 1/3 s it would be 40cuftHe used backgas and 13.6cuftHe seems to me.