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It's amazing that a bum totally without any class can write poetry. Did your English teacher write it for you? Give Tom a break, he's forgotten more about diving than you'll ever know and he still knows more than you ever will. BTW I have been unable to find any hard data that states what percentage of divers at a specific workload, PO2, and time at pressure will suffer an O2 hit. I'm willing to concede that PO2 >3.0 is very unhealthy unless done at rest and I assume that PO2 < 1.3Bar is probably safe enough that even the navy won't get into trouble at that PO2. But I believe that all values of PO2 in between are based on plucking a number out of a hat or the time tested method known as a "Wild Assed Guess". I have dived my O2 rebreather at 12M for more than 60 minutes at light to medium exercise levels with no ill effects (PO2=2.2) and I really don't think that I am a superman or that I have an especially high tolerance to O2. Since I learned about the max recommended PO2 of 1.6 for 45minutes I have given up deeper dives than 6M with my O2 rebreather, but did I really have to? Does anybody have hard data regarding O2 hits at various workloads, PO2's and Times with a sufficiently large sample population and where can I get the raw data? Michael Fisch I am able to speak my mind because I don't have an Instructor rating from ANDI, IANTD, TDI, PSA or any other of the "let's make money by teaching idiots to swim underwater crowd, and while we're doing it, lets sell them $3-5K of equipment for $5-9K".
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