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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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