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What happens to the exhaled helium? Don't you just rebreath it again? I 
know that the Cis Lunar is set up to change mixes and that some 
experimentation has been done to this effect. However, I would like to 
know about the effect of never actually getting rid of all the helium as 
you continually offgas.

Mark Pansing
markp@br*.co*.co*
mpansing@fr*.co*.oh*.us*


> >
> >Running a few tables, it seems as this would also be a significant 
> >advantage using a rebreather, ie do the main part of the dive on a 
> >trimix (or heliox) diluent, then switch diluent for the decompression to 
> >a nitrox. 
> >
> >Are any of the (forthcoming) rebreathers capable of handling this? Any 
> >other thoughts on this matter would also be welcomed.
> >
> >
> >David Wilkins
> >

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