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Aloha,
	I've been reading the techdiver mail for a month now, but haven't gottenaround
to introducing myself, so here goes...My name is John Rooney. I'm 
fortunate enough to live in Hawaii, on Oahu, where I've done the majority of my
about 1250 dives. I'm a PADI Master Scuba Diver Trainer, but quit instructing 
full time to go to the U. of Hawaii, where I'm working on an MS in
Oceanography.I've always wanted to get into the tech diving scene & was
frustrated by PADI's 
reluctance to support these types of diving, and the general lack of
informationavailable. So I'm pretty stoked to have taken a Nitrox course & be
taking 
Advanced Deep Air from Epic Dives, as well as to be learning from techdiver. Am 
looking forward to mixed gas & rebreathers, which I'll be able to get into in 
support of a research project at UH thats designed to date submerged shorelines
on Oahu.
	In answer to John Crea's statement regarding carbon monoxide
> "Talking about carbon
>monoxide, if a breathing mix is safe to breathe at the surface (re: it's
>carbon monoxide level), then it will be safe to breathe at any viable depth
>based on its other parameters."

>Think about it!

Since carbon monoxide binds about 200 times more readily to hemoblobin than 
oxygen, the partial pressure of the carbon monoxide may be irrelevant, because 
it is already having its maximum toxic effect at the surface. Is that it John?

John R

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