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Mixaddict · 10th January 2007, 06:08

Quote: (Originally Posted by RonMicjan)

out of curiosity, why the twenty questions on narcosis?

Hi Ron,

Thanks for your thoughts. Have been doing some dives in locations where helium in unavailable (or at least very difficult to get!) For me personally, it has seemed while diving CCR that I have been feeling the narcosis at more shallow depths than I typically do on OC, and basically wondered if other divers felt the same way. But here again, as you well know, it comes and goes differently on different days! My suscpicion is that the perceived narcosis level increase on CCR for me is possibly more about task loading than actual narcosis increase?

Anyway, just mostly curious. Usually, if I am going deeper than 140 feet on CCR, I squirt some helium in the dill. On OC, I am usually comfortable with going quite a bit deeper (subject to conditions.)

Interesting thoughts on the O2 not contributing to the narcosis. As you are aware there are a couple of schools of thought on this topic. I am going to give your experiment a try next time I'm out.

Regards,
Randy

10th January 2007, 06:08	#31 (permalink)
Mixaddict Always Learning! Current Rebreather/s: Inspiration Vision Evolution Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Jan 2006 Location: Draper, Utah USA Posts: 508	Re: Deep air on OC vs. CCR Quote: (Originally Posted by RonMicjan) out of curiosity, why the twenty questions on narcosis? Hi Ron, Thanks for your thoughts. Have been doing some dives in locations where helium in unavailable (or at least very difficult to get!) For me personally, it has seemed while diving CCR that I have been feeling the narcosis at more shallow depths than I typically do on OC, and basically wondered if other divers felt the same way. But here again, as you well know, it comes and goes differently on different days! My suscpicion is that the perceived narcosis level increase on CCR for me is possibly more about task loading than actual narcosis increase? Anyway, just mostly curious. Usually, if I am going deeper than 140 feet on CCR, I squirt some helium in the dill. On OC, I am usually comfortable with going quite a bit deeper (subject to conditions.) Interesting thoughts on the O2 not contributing to the narcosis. As you are aware there are a couple of schools of thought on this topic. I am going to give your experiment a try next time I'm out. Regards, Randy __________________ Randy Thornton (MixAddict) Inspiration, Evolution, Hammerhead & Sentinel CCR Instructor
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