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Putting helium in the gas shortens the deco. The only excuse for air is still ignorance. Option Number One says " Don't Dive". If I can not do it right, I "Don't Dive". I generally mix only 50-60 helium wtih 12 oxygen for eveything cave, and 50-60 helium with 17-19 oxygen for eveything ocean, unless I am single tank diving , in which case it it 30/30 and we stay shallow. The 17-19 stuff requires NO deco gas, but you can use it if you want to accelerate the deco or do more dives. I only dive my "project" once in a great while - the rest of the WKPP actually does all of the diving . I think I have done less than ten dives with the WKPP this year. We have 100 guys, they do not need me to be there , and there are so many sites I could not possibly be there all of the time. True, sonme REQUIRE that I be there, but we do not dive those very often. My big thing is ocean diving. Rubrifolia@ao*.co* wrote: > > In a message dated 98-07-19 07:50:34 EDT, kirvine@sa*.ne* writes: > > << Actually, diving air and 50 50 is less narcotic than diving 32 nitrox. > however, this is a "mute" point since only a stroke does either one. The > correct thing to do is dive trimix for that dive with NO deco gas at > all. > <snip> > We use air for NOTHING. We use the lowest AED we can get wtih the gas > banks. We dive PPO2's in the 1 to 1.2 range. We do the deco according to > reality, not fear and loathing. But then, we have much different results > than the rest of you , now don't we? > > Rubrifolia@ao*.co* wrote: > > > > In a message dated 98-07-17 06:43:55 EDT, you write: > > > > << the even more insane practice of > > diving air on the back and mix in a stage, we can expect many people to >> > > > > so whats so bad about diving air and using 50 50 for the deco? for ex on a > > 130 ft wreck .....seems to me to be better than all these people coming out > > and doing 130 on 32EAN...... > > don't get cranky now....the ex is a 130 ft wreck dive, 'cause that sort of an > everyday....now if i did the math right....the po2 for 130 on air is > l.04...the 50 50 nicely accelerates the deco time....trust me when I say that > no one is afraid of doing deco, just that we don't get to sit on tree logs, we > are in the open ocean and fairly aware of the contingencies that > apply.......plus the fact that boats have schedules and there are just so many > people that can comfortably fit on one anchor lline and and and....so say 50 > minutes w/50 50 gets you 53 minutes of line time.....40 gets you 37 and 30 > gets you 23 minutes....CNS% is 18, 14 and 10 respectively......whats so bad > about that? > > plus air can be more flexible re changed boat destinations which happens alot > up here ....Captains and conditions change their minds...this is not strokery > just dealing with the everyday facts of dive life up here.....I am not arguing > about trimix for deeper stuff, I used mix this year for the first time on the > Doria and totally agree for that application, but for everyday use in the 100 > to 130 range, I don't see your point yet....... > > yes one could say your results are different from ours, but then you can > exercise much more total control over divers and destinations... as I > understand it, you are running a project --a project, not a weekend day out on > the water--- that happens to utilize the 'sport' of diving as one of its > tools.....and yes, very well and with great results..... -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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