This seems pretty clear; There are reasons to reduce your ambient pressure as quickly as possible to speed up degassing, and there are reasons to make your pressure changes as slow as possible to control bubble dynamics. Since there are mathematical models available for both; why doesn't someone whose head hasn't rejected it's maths implant (like mine has) try to formulate an ideal medium between the two? It would be worth noting that firstly, neither of these models will be perfect, but they are the best that we have, so why not throw some numbers around. Secondly, making the same assumptions for both models may require altering them. For instance, if the compartment algorithms are based on statistics, they will include the creation of and removal of bubbles in their planned stops, and they would need to be re-jigged to remove that assumption. You could then look for the optimum ascent rate to prevent bubble establishment and growth whilst depressurising as fast as possible; and have a predictive model for dive planning. I won't dive it, and I guess no-one else would, but we'd have some numbers to play with. The principles are about as clear as they're going to be without all of us going home with a serious physics textbook. Incidentally; a long lost memory - didn't NASA try using diving based theory to safely decompress it's astronauts to .2 Bar O2 for EVA? And it didn't work well? Wouldn't that discrepancy be explained in terms of the 'new' model? Cheers, Jason
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