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Mike- How to qualify for shallow mix: 1. Go to local gas supplier and purchase some helium. 2. While you are there, get some O2 as well. 3. Purchase a whip with He adapter. 4. Procure a best mix table, avoid the mixes with 02<17% 5. Fill tanks. 6. Analyze mix with O2 meter. I hereby deem you a Normoxic Mixed Gas Diver. Please send me a check for $1000. Jim Sender: Mike Zimmerman Date: 7/20/98 10:07 AM >> I know for a fact that 120 is more narcosis than I want, than I want >> anyone around me to have, or than I will allow around me. It is for >> idiots and strokes, and we have no lack of those, now do we Dave? > >I don't mind holier-than-thou stuff so much when it seems to be >consistent. But this is the first time I've heard of 120 being >"deep air". Shit, now I'm a stroke for diving 120' on air. > >Ok how do I un-stroke... let's look at the alternatives... > >Guess I should take a mix class. Ok. Where do I stand. > >I have my nitrox card and a thorough understanding of Haldanean >gas theory behind the tables. Wrote code to replicate the tables >down even to the pressure groups. Added in code to handle the >helium in the mix, but never have played with it much, set it >to zero, haven't dug out the constants either to plug in. Can;t >say I can claim a good understanding of how helium affects everything, >then again I think I could gain that (at least at the table theory >level) in 2-3 hours of reading and crunching some numbers. > >I'm fine with doubles, and a stage and a deco bottle. Ok >for shallow (say 150') mix, that should seem to be plenty. >for 150' it shouldn't seem to require a hypoxic mix, so maybe >a deco bottle would be that I need. > >Let's go agency shopping. > >Let see > >IANTD everyone's favorite.... > >Let's see, basic nitrox now... I gotta take >hmm, its not clear, but I know for the full-blown course mix you had >to have several levels of nitrox, deep air before trimix. They >now have "Intermediate Trimix" which seems to fit the bill... >They list 130' as the beginning of the zone for the mix, but >I guess they won't stop you from using it more shallow.... > >Andi.com brings up something else, and don't feel like sarching for >it... on to GUE. > >Ok start with Advanced nitrox... not sure if my IANTD basic covers >me for that.... do note that GUE lists that their advanced nitrox >diver 1 course goes below 120' to 130' . We've had the discussions >before about nitrox not being less narcotic than air. This >looks like "deep air". > >well maybe place out of that course, on to the next one... > >looking at the Technical Diver 2 course, it states that its >purpose is to train divers in the 130-200' range. Of 8 dives, 2 will >use Helium. That's 6 dives that while are not "deep air", they >look like "deep narcosis". > >Also I'm not clear that I can get mix fills after this class? >since the NEXT class is entitled Mixed Gas, I'm going to assume not. >Be glad to find out I am wrong. > >So with GUE as well, I have 2 more course to take. Maybe 3 if >I don't place out of the Advanced nitrox one (advanced implies >there was some "basic" as a pre-req to me). > >Actually its not that I want to dig at these course guidelines, >its that people have been yelling about "deep air" for years >now, but at the same time, even with GUE, when you say ok give me >an alternative, let me learn trimix for shallow depths... you get >nothing. Let me take a class to learn mix for 100-150' depths. >Shouldn't need anything hypoxic at those depths. Should need what, >maybe one deco mix? Why should a diver need anything but basic nitrox >before taking such a course. Make the math and theory rigorous, >but offer the course. Flunk those that cannot prove they understand the >theory. > >so where are the alternatives? Why can't we remove all these hoops >before someone will certify you for shallow mix? > >Make it accessible, people will use it. Put multiple expensive >certifications in the way, and people will not. Not because >they don't want to, but becuase shallow mix isn't worth $2000 >in course fees and 2 weeks of my vacation time. It ain't that >friggin complicated. > >Ho hum, sure this will turn into a fun set of replies. > >Mike > >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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