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<Deepairok@ao*.co*> wrote: >but a lot of useful info gets through now > >deepairok Like what? Your assertion that deep air is OK? Driving drunk would be OK too, if only you had the road all to yourself. I haven't seen anything terribly informative since G's last post. Seriously, though, it's a question of degree; the government here says .08, a lot of people say 130 feet, etc. Personally, I think there's a transitional zone between 130 and maybe 180 or 200; shallower and you'd be wasting perfectly good helium, deeper and you're too far out on the ragged edge, but within that transitional range it's a question of complexity of dive and suchforth. Most of the past arguments here about deep air have been, I suspect, predicated partly on people throwing the word "deep" back and forth at each other without quantifying it. One person's "deep" dive is 150 feet, and another's is 400, so the one says you're fine on air and the second insists you'd have to be a loonie not to be using mix. I'm at the stage now of building up experience at an IMHO reasonable maximum Effective Air Depth (the 160+ range, after having completed IANTD Tech Nitrox/Advanced Deep Air) by virtue of diving to that number of feet on air before (when I can scrape the coinage together) taking a mix course and starting to open a gap between effective and actual depths. (Unless maybe I take cave first.) Maybe we should have an Official Terminology Change; "Deep Air" should mean "diving on air to a generally-accepted reasonable limit" and "Extreme Air" should mean "diving on air beyond such a limit". I hereby nominate 180 feet for that figure. There. If that's not discussion starter, I don't know what is. -- Anthony DeBoer http://www.onramp.ca/~adb/ adb@he*.re*.or* (here) adb@ge*.co* (work) #include "std.disclaimer"
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