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Leslie Wilk writes:
>
> [...] Buhlmann's tables are
> built from the algorithm by forcing the initial descent to be instantaneous,
> but they are USED by including the descent time in your time-at-depth.
> >From a TABLE point of view that is conservative. With respect to the
ALGORITHM,
> if you constrain it to a fixed descent rate (say, 60 fpm), shouldn't
exceeding
> that rate get you to depth with a lower tissue-load than the algorithm
computes,
> thus also being conservative?
If the tables assume you descended slower than you actually descended,
then you will actually ongas more than the tables have calculated.
(Draw the two curves -- you'll see that your actual profile is wider
than the table's estimated profile.) Therefore when you ascend, you
will have spent more time at depth than the tables expect, and you may
be exceeding their parameters, and thus invalidate their testing.
As someone else points out, this is all theoretical and cannot be
proven to contribute directly to your risk of DCI, but theory is all
we have to discuss. "Absolutely nothing can be proven absolutely."
Cheers,
David Story NAUI AI Z9588, PADI DM 43922, EMT
story@be*.wp*.sg*.co* Better diving through computers.
"I avoid this by periodically pressing down on the top of my head
and forcing the air out." -- Charlie Gibbs
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