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Richie, I love you but you are unrealistic: we are so intensely concentrated
on what we do we would never know the machine failed. We are also in such
increidble physical condidion that hypoxia is a joke to us - we get no warning.
What happend to Bill is that the sensors loaded up with condensation and all
stuck at the last reading, telling the machine that the PPO2 was ok. This
happens once in a while. He has gotten some longer times out of it, but the
problem is that it will happen eventually no matter what. You do a real long
time in the right conditions, it will happen to you. You have forgotten that
these things are not intended for huge long times, but for the convenience of
tiny gas supplies. You also forget that with the exposures you do, if the
machine fails in the other direction - too much oxygen - you are likely to get
away with it on your dives, and it may in fact help your deco. For us, this is
not possible, as we are now down to 1.0 or less ppo2s and less than 1.4 at deco
just to not tox.
The main thing that you are not acknowleding here, which is rule number two
in rebreather diving, is that task loading is what kills - that means anything
that calls your attentiion away from the machine.
Richie, for what we do, the diving apparatus must require no attention, for
what you do, it its most of the fun. Please be careful what you suggest to
these
storkes on here - they know they can not copy me, it is too much work, but they
think they can copy you since you try to make it sound so easy.
On Thu, 5 Sep 1996, Richard Pyle <deepreef@bi*.bi*.Ha*.Or*> wrote:
>
>> Rich , you are so full of shit it is really getting out of hand. How did
Gavin
>> run out of oxygen?
>
>I'd love to hear the answer straight from him on that one. I've
>personally heard two versions - one is that condensation got on the
>screens in front of the O2 sensors, sealing in a small pocket of gas
>against the sensor membrane, fooling the system into thinking that the O2
>was high, and therefore the solenoid was never triggered. Meanwhile, he
>metabolized off all the O2 in the loop. This is a critical problem that
>I've never seen discussed in books or elsewhere.
>
>The other version of the story was that in the EX-19 they tried to protect
>the sensor membranes from mositure with some sort of hydrophobic membrane
>system, and that this led to a significant lag between the loop PO2 and
>the sensor chamber PO2.
>
>Do you think you could ask him what the real situation was? I'm not
>being an ass - I'm being sincere here. If it was one of the above, I'm
>not worried because I've got those covered. If it was something else
>(which I suspect it was), then knowing about it may someday save my life.
>Maybe it had something to do with that new fangled solenoid deal I heard
>they had - maybe it was so quiet that he couldn't hear it.
>
>Rich
>
>P.S. Although I admit to being constipated these past few days in the
>wake of a nasty flu I had over the weekend, I somehow don't think that's
>what you meant when you said I was "full of shit". In the future, could
>you at least give me a clue as to what comments like that are in
>reference to? I mean, I lie *so* often on this forum, that it would be
>nice to know which one of my lies you "caught" me on. (Translation: don't
>be such a dumb-ass).
>
>
George M. Irvine III
DIR WKPP
1400 SE 11 ST Ft Lauderdale, FL 33316
954-493-6655 FAX 6698
Email gmiiii@in*.co*
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