Will, I do not know who your instructor was, but given the criteria you describe I would say he did a very good job. Your assesment of the value of such training (not certification) is correct, it's ultimate purpose is to discourage, not encourage diving past acceptable limits on air. Further, this limit must be arrived at by accounting for a number of variables, both individual and physiological as well. There is no magic number or blanket philosophy to cover the limits, although common sense should cover a large degree. With training adaptation does occur, but this adaptation only last as long as the series of dives last. What does last is the proper training where you learn the proper respect for your physcological and physiological limitations as well. Now finding an instructor who has the experience, attitude, and of course the desire to teach you these things may be the most difficult challange you face. There are a lot of good teachers out there, but there are also a lot who think they know an awful lot more than they do. The responsiability to seek out this person has to lie with the candadate, not any given agency. 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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