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> An interesting feature might be the capability to handle missed deco in a > more constructive way than current computers (lock off for 24 hours). The > computer could probably tell you exactly how to perform IWR based on > bubble growth during the time you were at the surface. It should also be > able to give you an air version of IWR. Years ago, when I first heard of the Quatek ACE ProFiler (I think that's what it was called) dive computer - a mixed-gas programmable decompression computer, I wrote Kevin Gurr and suggested this exact thing. We decided it was unfeasible for two reasons: 1) Liability (it'll get you EVERY time!), and 2) We know soooo little about IWR that we wouldn't even know where to begin in terms of developing a model. Perhaps a more realistic first-step is to work out an IWR flow-chart that accounts for three or four different dive variables, that suggests one of maybe three or four different IWR protocols (how much surface O2 before going to IWR, whether or not to add a deep nitrox "spike" and for how deep and how long, etc.) I've suggested this to Eric Maiken, who might be able to come up with some physics-based ideal IWR profile for various sets of factors, but neither of us has had much time to think about it long and hard enough. Anyway, I think that sort of thing might be a first-step towards developing a model. The problem with IWR is that it's almost impossible to do controlled studies on it. The only way to learn anything meaningful is to examine hundreds of anecdotal cases. Unfortunately, not that many people are doing it, or if they are, they're not recording many details. I suppose we could learn a little bit about it by bending defenseless little furry animals and seeing how they respond with immediate recompression in a chamber...but who's got the bucks? Aloha, Rich Richard Pyle deepreef@bi*.bi*.ha*.or* ******************************************************************* "WHATEVER happens to you when you willingly go underwater is COMPLETELY and ENTIRELY your own responsibility! If you cannot accept this responsibility, stay out of the water!" *******************************************************************
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