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Date: Wed, 31 Jan 1996 07:46:51 -1000 (HST)
From: Richard Pyle <deepreef@bi*.bi*.Ha*.Or*>
To: "George M. Irvine III" <gmiiii@in*.co*>
Cc: TechDiver <techdiver@terra.net>
Subject: Re: Rebreather questions

>   Rich, this sounds so easy! Why did the Navy not think of this? 

They probably did.  If they didn't it's because they didn't have a need 
for it, or their rebreather design wouldn't allow it.

> Gee, I wonder why we all are not cave diving with these?

You tell me.

> Rich, what happens when the sensors get a 
> little moisture on them? Maybe you could help us out with that one,
> then we can all use rebreathers to cave dive.

George, enough with the moisture on the sensors already - that's a dead 
issue.  There are VERY simple ways to keep moisture off the sensors. 
There are VERY simple ways to determine whether or not the sensors are 
giving you accurate information.  You're a clever guy - I bet you can 
figure it out.  Go back and read my message - one of the things you have 
is a diluent with a known O2 concentration.  What I didn't mention, but 
should have, is you have a back-up depth gauge.  So, you know your depth, 
you know the gas fraction....come on....you can figure it out...think hard.

> Since they have been around
> longer than you are old, I wonder why? 

I really don't know why.  Rod?  Will the BioMarine Scheme allow for the 
bailout I suggested?  Maybe there's not enough difference between the 
"high" and the "low" in the counterlung volumes?

Help me out here, Rod.  You seem to be the only one on this list whose 
opinions on rebreathers George respects. Is my bailout scenario way off 
base?  Why do you s'pose the Navy doesn't do that? I've never dived on 
one of their rebreathers, so I don't know.


>     Real World - go cave diving with one of these is a real cave and
>     then tell us how easy and safe they are. Why does nobody do this?

I told you George, because there are no reef fish inside caves.

Aloha,
Rich

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