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Hi 

Will, could you please comment on the following concern regarding the
conservatism factor used in your program:

As I understand it, the factor is used to extend the time spent, for deco
calculation  purposes only, at each entered waypoint. Thus if you use a 50%
factor, and have a waypoint of 10 minutes durtaion, the program calculates deco
as though it were a 15 minute waypoint. Correct?

That's all fine, except when the layout of a cave forces long waypoints during
ascent. My usual cave site here in South Africa is actually a flooded mine, and
to get to the 110 m deep vertical shaft we have to swim for about 8 minutes at
20m in a haulage. So on the way in, the program (at 50% factor) assumes I'm
ingassing at 20m for 12 minutes instead of the 8 minutes I'm actually there.
Fine, that's conservative. But on the way out, won't it assume I'm outgassing
for 12 minutes at that depth, instead of the 8 minutes I am actually there? In
other words, won't the "conservatism factor" lead the program to believe that I
have outgassed more than I really have, and underestimate the remaining deco
time?

I'd be interested to hear your thoughts on that one.

Safe diving

Mike Beresford
South Africa
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