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Steve Hogan sent this message. In it he let many of his lines get well over 78 characters long, which will often be displayed truncated by emailers. So here is his message reformatted:- .................................................................. Date: 5 Jul 1994 12:10:49 -0800 From: Steve Hogan <Steve_Hogan@qm*.sp*.TR*.CO*> Subject: RE:Undercurrents and O2 reb To: techdiver <techdiver@opal.com> Mark wrote: > Concerning 100% O2 rebreathers...Does anyone have any information about a Japanese manufactured O2 rebreather featured on Beyond 2000 a few years ago. It used two small O2 canisters, and two flexible (accordian type) hoses that wrapped around the head where the Co2 scrubber was located. (The hoses flexibility was supposed to decrease the chances of AGE.) It was an extremely simple system. They instructed users to breath at the surface as deeply as possible before descending to get as much atmospheric N2 as possible in their lungs so the PPN2 was as large as possible (to avoid Oxtox, ect). The unit of course is meant for shallow diving only, but any rebreather is better than none from a photographers view point. I would disagree. I saw the same broadcast (july 4). Did you notice how out of breath the person was each time she came to the surface (sound a little like a CO2 hit?) I do not know if it was her breathing (full exhalation given the volume of the hose lrading to increased CO2) or the device itself (maybe both). As I am not a photographer I do not know but I think that 10 minutes at 15 feet is a waste of time and effort. It occurs to me that unless the person using this device is trained in the oxygen limits (CNS O2 toxicity) that it would be REAL EASY to *forget* to hard floor of this device especially for those that this device is intended for, uncertified individuals that want to explore SCUBA without the time and effort for SCUBA certification (those most likely to NOT HAVE such training). Steve Hogan Steve_Hogan@qm*.sp*.tr*.co*
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