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Below is a small discourse I had with Steve Millard that was initiated
by me in view of of his statement about buddy breathing with a
rebreather.  I've tried to get the >>>'s correct.  In any case, what do
people say?

>>> Why?

>>>>	One thing for sure...buddy breathing with your rebreather
>>>>mouthpiece is *not* going to work out ...!  :-)


>>	Because every time you take the mouthpiece out you lose precious
>>gas & risk completely flooding the counterlung & scrubber stack.

>Granted, there is the flood risk, HOWEVER, if taught and done properly,
>you could carry this maneuver out with very little gas loss.  Each diver
>would *hold* their breath when the mouthpiece is not in their mouth.
>Proper passing technique would be to pass it turned down to avoid
>flooding.  The diver exhales into the bag then can take several
>quick breaths, and one or two longer breaths before passing it back.

>>Although the Cis-Lunar can cope with this & still work (which is pretty
>>amazing..!), you would be ill-advised to do this with every other breath
>>!!  You would need to vent the counterlung & stack to expel the
>>ingressed water every time the mouthpiece came out of someones mouth.

>There should be an easy way to minimize the amount of water ingressed
>during passing of the mouthpiece.  Even so, with the above technique,
>you could expel the ingressed water at a much slower rate than "every
>mouthpiece switch".

>>Although venting the system to expel water can be done in an emergency,
>>it's not the sort of thing you would want to do repeatedly & certainly
>>not with a stressed diver next to you.  You would also get through a
>>*lot* of gas like this !!  You only have 2 litres or less to start with
>>& it's not going to last long if you try this trick....

>Of course, I understand this.

>This all brings up a point.  It probably wouldn't be TOO hard to hook up
>a completely separate mouthpiece (like the Mk IV had) for just
>such occasions.

-Carl-

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