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> While I can sympathize and in many ways agree with that approach, it simply > doesn't appear to have any logistical means to be carried out. If say the > diver has to wait for 50 hours on the unit to receive the card, does that > person commute to the location where training and units are available? The idea would be to spend the actual course time hammering in the fact that a lot of carefully controlled time in the water is necessary before going hog-wild on more difficult dives (like 60 feet deep). Then send the user home with a progressive plan to follow to increase their own skills. > Does > the person take their unit home and promise to send in proof of their dive > time? (Lot of cheating potential there). Sure there is a lot of cheating potential. That's why the actual course would have to hammer into the students heads' the fact that the only one being cheated is the student him/herself. > Do they get a "learners permit" > so they can get gas fills? That might work. When they do complete the at-home training the certification agency would then send the student a card that says "You are now certified to kill yourself on a rebreather." I don't mean to make light of this, I know the legal aspects are daunting. I know even less about the legal system than I do about semi-closed rebreathers, so I don't know what to say. What I do know are these two things: - 50 or 100 hours of in-water time within the framework of a training course is unrealistic - Most divers with less than this much time on a rebreather are probably not qualified to make rebreather dives at a similar level of complexity as they used to on scuba. You suggested that the critical time is during the initial introduction of rebreathers to the market. During this time, I think each manufacturer will have to invent their own rules, and consult with their lawyers about how much liability exposure they're willing to accept vs. how much money they make selling rebreathers. I just don't think that 1) rebreather designs are similar enough, or 2) denominator values are large enough for the technical diving community and/or training agencies to come up with accross-the-board enforcable standards. So said the ranting ichthyologist fish-nurd, err... I mean fish-nerd. Aloha, Rich
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