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If in open water why not cut the bottom time back and make two dives instead 
of one avoiding an outragious DECO?
 Just a thought, what you think George?
AL Kimbrel
Now for the real answer..........

In a message dated 99-09-09 22:13:11 EDT, dmackay@cg*.wa*.ca* writes:

<< Hi George and to anyone who might have an answer,
 
 On my longer dive profiles which are typically 30 - 50 minutes @ 250', I 
always
 use a 16/50 mix with 50% & 100% for deco. At the end of these dives (or 
longer
 duration) I have blown my CNS clock away. For a 50 minute exposure I have a 
total
 CNS clock of ~180%. This does not appear to cause me a problem as I have been
 doing a couple of dives a week using profiles like this for a couple of 
years now
 and this has not proved a problem. The only time I think that I ran into 
this as
 a problem was about 4 years ago when I was diving a lot of deep air with 36 
and
 80 for deco (ok it was before I saw the light) on the last two dives I did 
in a
 two week period I couldn't breath by the time I hit my 20' stop. Symptoms 
didn't
 abate till I was on the surface for about 15 min. In anycase I don't do that 
now.
 I know this is small potatoes compared to what you and JJ do on a normal WKPP
 dive. What do you do just ignore it? or what is your philosophy on this?
 
 Thanks,
 Dan
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