I would be curious to know if the diver that set the world record looked
at CCR and SCR and made the decision or did he have access to only a SCR. 
Bill Stone's work in caves is done entirely with CCR units (you already
know this) and the sum of all distances travelled in caves by CCR units
today probably far exceeds that of the world record holder you refer to. 
Did the SCR unit that was used for the record have O2 sensors on board? I
like some SCR units and would modify and shrink one in particular as a
bailout unit if my CCR failed in a manner that required me to bail.  I
will say with respect to the Odessey rebreather that has gone out of
business regardless of what Dan Volker says, that it might reappear as a
unit marketed by a well known diving company whose name begins with the
letter O. Sources say that the O company recently lost a lawsuit that
necessitated its withdrawing a rebreather unit that it had promised to the
industry and had, in fact, built a couple of prototypes that were shown at
the 1995 DEMA show. Negotiations are underway at this moment and the O
company and Odessey might be getting together- but it is not a done deal
yet. Please Please, this is a secret and should not be shared by anyone
not on this list. Four people shared this information with me at BTS this
weekend, after first telling me that it was a secret. Dave Schubert of
Dive USA verified that negotiations between a "major" and Odessey was
taking place but did not divulge any specifics at all. I was told by
others that the O company wants the inventor/designer of the Odessey to
produce a smaller unit- that for my purposes of bailout- would be closer
to something of use for me. I was also told that as of this weekend past 
there was no deal between the O company and Odessey. Further, if what I 
was told is true, then if another backer is not forthcoming for Odessey, 
the unit- as a commercial venture- ain't going to happen. Rod

On Sat, 23 Mar 1996 gmiiii@in*.co* wrote:

> 
>    Why is it that the world record cave penetration is held by a semiclosed 
> rebreather , and none of you is stupid enough to take a fully closed on a
real 
> cave dive. Why is that? Until you do, they don't work, except in the
applicaton 
> they were originally designed for, and then only the ones that the miltitary 
> uses, or the civilian versions thereof. The rest are absolute trash. - G
> 

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