| If you cut an awfull lot of tables for dives using the same gases on a given program, you should start to see enough trends to make some rules of thumb. You could then test the profiles given by your rule of thumb in your program and arrive at a sort of Deco by Thumb sort of arrangement. It might well be that the DIR standard gases give unusually tidy answer in this respect. Seem like a lot of effort to avoid using DIR gases though. That said the particular rules used by DIR are not exactly common knowldge yet. If you narrowed it down to a praticular depth range and dive lengths it shouldn't be too hard, but probably not agood idea unless you really know what you are doing.
Andrew
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