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In message <Pine.SOL.3.92.960531115812.21968D-100000@hs*.us*.ed*>, "Peter N.R. Heseltine" <heseltin@hs*.us*.ed*> writes > >On Fri, 31 May 1996, Wixson, Steven M (Mike) wrote: > >> Isn't there more to this? I had heard that the subject had been under >> intense exercise when he experienced the O2 hit at 1.3 ATA. > >Brett said it was in a chamber and the diver had exceeded his CNS clock. >That's certainly not clear from the context of the US Navy Divers Handbook >warning. We (I) need more data, even if it's anecdotal. I also have a lead >on some folks in Germany and a Prof Elliot in London. I will try to >contact them and see if I can get some empiric evidence. I feel >uncomfortable relying only on opinions for something that could be fatal. >What do you techdivers out there actually do? Commonly exceed 1.4 ATA >while excercising? This might be at least some collective experience. The level headed approach is to plan bottom mix Ppo2 at 1.4 max. It's a mute point as to what people generally consider exercise. In the UK scooters are the exception rather than the rule, so if moderate finning is considered as exercise then this is what is generally done. As far as I know the only O2 problems in the tech community over here have been at 1.6 Bar Ppo2 during decompression, but the details were not conclusive as regards times etc. and generally little exercise occurs except to maintain good blood circulation. Regards Chris Chris Hellas e-mail:- chris@de*.de*.co*.uk* ********************************************************************************
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