Dennis, no big deal, I thought you were ignoring the factual part and
assuming 
I was making it up. I did not know you had been getting innvolved with the 
Biomarine, I knew you had given up on the others. 

  Most people think that a rebreather would be the ideal cave instrument. Not 
so. Ask Bill Gavin. He and I were talking about building a couple of units as 
bailouts in the event we really got screwed up in a cave. We were going to run 
them as front mounted, but he quit cave didving altogether. Remember, his job
is 
rebreathers for the Navy, and he won't dive  one in a cave (or anywhere else
but 
a tank). 

  Olivier Isler uses a double semi rebreather with a third front mounted as 
bailout . As yo ukow, he holds the distance record in a cave. 

  Stopne and King want to use the one Richie has to cave dive. Here is one of 
the problems: if you  had to bailall the way out to open circuit, you would
need 
all of the that gas staged in the cave on the floor - a lot of gas. They would 
lkely need a lot more gas than we do, as we can already do what they want to do 
on open circuit. Based on the strokes these guys have as dviers, I would
estimat 
e the ned to be as much as three or four times the gas we use, ast least this
is 
their track record so far.

   That of course assumes that they even konw they need to bai out, or are able 
to sucdcesfuly bail out. They thingk theat the redudency of the MK5is all they 
need, plus the stage bottles. I would suggest two things to thes  gusy: one a 
reality check - go cave diving, and two, get a pair of Nike's and get dwon to 
our breathing rates. Guess  what? There goes the need or the desire to use 
rebreather

   On the other hand, I would love to have one so I could go places like the 
Bahamas without the tanks, or walk through the woods and jump in sinkholes to 
look. For cave diving, then we need open circuit or a rig like Islers. That rig 
Farb has is a beauty.

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