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> "The inherent weakness of closed-circuit rebreathers is the reliance on
> electronics to control the oxygen concentration in the breathing loop. As any
> underwater photographer knows, electronics and water (particularly salt water)
> do not mix. Indeed, closed-circuit rebreathers have earned a somewhat
> notorious reputation as being "unreliable", largely due to failures of the
> electronic O2 control system (leading to either too much, or too little oxygen
> in the breathing loop)."
>
> Ray LaTulippe
Ray, thank you for making a point that I have been trying to make for a long
time: that those of us who do take rebreather diving seriously are fully
cognizant of, and openly recognize the inherent weaknesses of
elctronically-controlled rebreathers. We accept those weaknesses because in
our particular situations, the weaknesses can be minimized by clever design
and proper training, and are far outwieghed by the inherent benefits that
closed-circuit rebreathers provide for us. What we tend to find anoying from
time to time is when "no-nothings" on the topic of closed-circuit rebreathers
try portray us as ignorant, by telling us things that they dimly
understand, but which we have clearly and intimately understood for as
long as we have been diving with rebreathers.
> How about a dive-off the Halcyon against the Cis. 25 dives in deep cave, 25
> dives in deep open water.
>
> All problems recorded and filed for posterity!
Talk to Joe Dituri about that. He's been my primary dive buddy on the deep
ledges of late, and he dives with a Halcyon. We're going out Sunday, as a
matter of fact. Yesterday I went with John Earle (also on a MK-5) to the
380' ledge. It was a wonderful dive, but was somewhat "eventful", in that I
got skin bends, which is my first unambiguous case of any DCI in twelve
years. I just wrote a detailed report ("just" as in I finished writing it
about 15 minutes ago), and as soon as my companions review it for accuracy
and completeness, I will post it to the Rebreather forum. Nope, didn't have
much to do with the rebreather, except that the rbereather did prove to be
the PERFECT tool for a highly successful IWR effort.
Aloha,
Rich
Richard Pyle
Ichthyology, Bishop Museum deepreef@bi*.bi*.ha*.or*
1525 Bernice St. PH: (808) 848-4115
Honolulu, HI 96817-2704 FAX: (808) 841-8968
"The views are those of the sender and not of Bishop Museum"
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