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I haven't dove in the 50m+ range since the 70's and then only a handfull of 
dives.  Hence the following is basically from an armchair deep diver.

>Rich  
>deepreef@bi*.bi*.ha*.or*
>Wrote: 
>
>Nevertheless, our experiences ARE our experiences, regardless of what we
>hypothesize SHOULD happen (given our knowledge of diving physics &
>physiology).  The only "rational" explanation I can come up with is that
>microbubbles may form on initial fast ascents (even if those ascents occur
>between depths of 300 & 150 feet), which could possibly grow during the
>subsequent decompression.  The greatest problems are encountered is a
>scond dive is conducted.  The patterned we've observed is as follows (with
>lots of variation, of course, but this seems to be an underlying pattern):

It seems to me the advantage of slow ascents is exactly what is expected 
based upon "bubble" models of decompression as well as some empirical
observations.  The problem is that well tested tables/programs 
based upon bubble models do not seem to be available.  A readable overview 
of these models is available in "The Physiology and Medicine of Diving" by
Bennett and Elliott, 4th edition.  Why have table makers not added deeper 
stops to thier tables?

Barrie Kovish
Vancouver, Canada
bmk@ds*.bc*.ca*

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