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On Sat, 25 Feb 1995, Edward Stoner wrote: > I Don't know if my last post went through. MY apologies for the missing > paragraph. The post that was talking about going to a deeper depth on > the second dive hit the nail on the head! Dr.X gives the warning that a > deeper Deco depth then the planed 45' for 42 min. is shown. Sheck > explained this to me when I was planning my own deep dives. Maybe Chris > Parrott or Dr.Hamilton could explain this with a scientific answer, I > can't. I do know the bubbles need to be compressed at a deeper depth, > then decompression figured from that point. Again my apologies on my cut > and past. I've been giving this some thought....why would Sheck design the program so that it requires REcompression *AFTER* a dive? (i.e., a 70fsw stop after a 45fsw dive). Ignoring intravenous gas, any decompression algorithm would assume that the diver was getting closer to equilibrium during the second dive. Thus, had the diver been cleared to ascend to the surface, then returned to 45fsw, there's no way for straight tissue-tension models (to my knowledge) to require a *deeper* stop than the max depth of the second dive. The *only* thing I could think of is that Sheck's algorithm accounts for bubble formation and subsequent growth on the second dive....which means his program is a virtual IWR calculator!? I really wish he was still with us so that I could ask him. Does anyone else understand the math he put into the program? Aloha, Rich deepreef@bi*.bi*.ha*.or*
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