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In a message dated 97-05-27 22:29:00 EDT, Rdediver@ao*.co* writes: << Teaching people to dive deep on air is teaching people how to have an accident. Narcosis affects different people different ways, and the same people differently on different days. How do you train your way through these circumstances? Isn't that the point you have made in the past?. >> Ron, Your assesment of the effects of narcosis in the above statement is correct as far as different people, different days, etc. But the answer to your last question there about: "How do you train your way through that" ? You do that by training, and very diverse training to handle many types of sitiuational protocol. Deep air or more accuratley training conducted under the influence of sufficiant PN2 to induce narcosis does have it's place in the progressive regimen of training needed to reach adequate experience with many different aspects of "technical" diving. However, one of these goals or needs is not to obtain a "certification" to dive deep air. Most candadates can be trainined to handle themselves to between 140 -160 fsw under most conditions (this is speaking very generally) or 4.15 to 4.6 ATA's of nitrogen exposure. Beyond this range the numbers start to fall away rapidly. Such training should only be taken with the most experienced instructor you can find, (check them out always, ..anyone.) and never from one who tells you he can teach you to be a deep air diver. Personally, I only teach this type of training when it is in the progression to a full mixed gas program to people who have adequate experience and have demonstarted the proper attitude and dedication as well. I might add I have only thrown my thinking in on this issue because the track seems to be going off a little in the wrong direction. If we want to discuss the merits or the lack of them with regards to training in any respect with deep air is needed or not, or if it is pratical, etc. Then we need to work off a little more fact based information, and a little less hysteria. Diving deep on air is an unsafe practice, no doubt about it, we all know that. But does it have a palce in the training of an evolving technical diver ? I say absolutley, and I know this for a fact. Safe Diving, Tony M. Satterfield -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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