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> 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'.
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