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On 5/27/00, George Irvine (Trey) wrote: > I am a psychopath, not a sociopath, and my track record speaks to the > rest. Black is a pussy who did not like being corrected fro extreme > ignornat stupidity. No George, even I don't think you are psychotic, but that could change. As for my "extreme ignornat stupidity" were you referring to the pony bottle with pO2 1.9 debate? Thought so, and just FYI here is what TDI says in one of their coursebooks (authored I believe by Jan Neal, who IS a BEST diver, i.e. absent from this list): "A small volume scuba cylinder of EAN39 carried with a diver for a decompression gas can also be a redundant gas supply. In the event that the primary gas supply is exhausted, the diver can switch to EAN39 and make a normal ascent. If this emergency occurred at 130 fsw, the pO2 for EAN39 would be 1.92 ATA. Although the recommended maximum oxygen depth limit for EAN39 is 102 fsw (pO2 1.6 ATA) the exposure time for an ascent from 130 fsw to 100 fsw would only be 30 seconds. In this situation the pony cylinder becomes a "bail-out bottle." The risk for CNS O2 toxicity is minimal, especially compared to the alternative of no bail-out. In this situation, EAN39 provides operational safety as a bail-out gas shallower than 130 fsw without the need for an oxygen clean regulator that is required for higher mixes. Thus, when carrying a pony cylinder of EAN39, operational and physiological safety is increased." MJB :-))) __________________________________________________ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/ -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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