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> All of my diving is in the UK, out of an inflatable, on wrecks in the 30-60m > range. I'm very careful of what I say, because I am part of a BSAC club but > dive privately with a regular team of three. The BSAC do not agree with what > we do, (nor understand it!). For this reason I must be very carefull as any > information learned by the club could be very harmfull to our diving. This is shocking to me. How much power does the BSAC have to control people's diving, and who gave them that power? Not sanctioning things on club dives is one thing, being harmful to what people do privately is something else. > 1) Oxygen compatible equipment. We currently use an old scubapro first stage > with a number of second stages and take-offs for in-water O2 stops. We have > done nothing to the kit other than extend the hoses with commercial O2 pipe. The usual practice as I know it is to have the first stage cleaned, and all grease and O-rings replaced with oxygen compatible materials - "krytox" (sp?) grease and viton O-rings. Tanks and valves are also O2 cleaned. Second stages aren't exposed to high enough pressure to worry about O2. > 2) Currently using the Buhlmann/Hahn tables (0-250m) but restricted to 63m and > fairly limited bottom/stop time. 250m is way beyond the world record, to say nothing of safety standards, for air. I presume then that you are talking about mixed gas tables at some point. I would be most interested in some examples in the 100-120m range. Are you using O2 to reduce stop times, with special tables, or just using it for added safety with air tables? If you aren't afraid of the diving Gestapo it would be interesting to discuss specific sample profiles. Bill Mayne
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