#585 was: Quick update

Dirk Hohndel dirk at hohndel.org
Thu Jul 3 07:00:15 PDT 2014


On Thu, Jul 03, 2014 at 10:51:34PM +1200, Rick Walsh wrote:
> > in divelist.c there is the function init_decompression() which is supposed
> > to go through the dive list and find dives that still influence tissue
> > loadings of the current dive (in this case: in the planner). The rule is
> > that we assume that after 48h all tissues are back to their surface values.
> > So from the current dive we go back in time to find a surface interval of at
> > least 48 hours. After that interval we take all the tissue loadings into
> > account. There seem to be two problems:
> 
> Is this more complicated than it needs to be? If the tissue loading
> decays sufficiently in 48 hours as to be insignificant if there have
> been no dives since, is tissue loading from a dive 48 hours ago
> significant if there have been subsequent dives?

Yes, because the tissue loading only decays over 48 hours if you are not
diving. So it adds to the cumulative buildup in (especially) the slow
tissues.

/D


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