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You know many shops pre-mix 32 for distribution. They could premix 20/20 and have a set of tables for that, or for that matter just treat it as air. You could call it "super-safe air". Jim Sender: Mike Zimmerman Date: 9/22/98 1:11 PM >> You did ask agencies why they did not teach mix in the 130 to 150 range. = >> I for one did answer you and stated IANTD does in it's intermediate = >> trimix program. > >Actually I was referring to contact I had with a different agency. >Apologies if I slighted IANTD, that wasn't the intent. > >> Now as far as skill and theory go it does require more skill to do = >> deeper dives than shallow ones and more equipment management. > >Ok, but we're not talking about teaching these divers to go DEEPER. >I am talking about dives tha are already occuring ON AIR. > >Taking a NC wreck, for example. Plenty of them in the 100'-130' >range. Very "recreational" depth. Also widely considered to be >in the range where narcosis will be a factor. > >Why not a simple course to teach them to use mix? If I remember >correctly, the IANTD Intermediate mix course is 70 hours? >(apologies if I have that confused with another) > >After all what do we teach OW1 students, or basic nitrox students >in reality? > >Here is a table. It says you are breathing mix XYZ. If you are >breathing XYZ, here is how long you can stay at depth D. when you finish >your pressure group is #. > >Would it REALLY matter if that was a heliox table? > >> at having magic wands waived to allow divers to do deep mix dives (as in = > >We're not necessarily talking about DEEP dives.. only narcotic dives >(when done on air) > >You have to step back from any preconceptions, but really, if >you taught OW1 with heliox, think about the difference in >narcosis.... > >Kinda amazing how simple that could be (if you ignore the issue >of availability) :-) Point being we seem to like to teach >stages, deco, gas managament, yadda yadda yadda with mix... >it doesn't have to be so (I would argue). > >Regards, >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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