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>From: Phil Clarke <phil.clarke@bt*.bt*.co*.uk*> >To: "'Nanci LeVake'" <nlevake@ho*.co*> >Cc: "'cavers@ca*.co*'" <cavers@ca*.co*>, > "'techdiver@aquanaut.com'" <techdiver@aquanaut.com> >Subject: ppO2 of 6 >Date: Fri, 7 Aug 1998 15:58:53 +0100 > >>> Regs of different colors, shapes, manufactures, with poodle jackets >>and/or color-coordinated hoses, and bottles stacked or on different >>sides according to O2 percentage will only confuse the issue. What you >> >>need to do is simple. Look at your bottles. Select the bottle marked >>with the MOD corresponding to the stop you are at. Turn the valve from >> >>that bottle on. Put the reg from that bottle in your mouth. If you >>can >>breathe, you have the right gas. >> >sounds good. how about a quick purge of the reg to see if its switched >on, rather than a breath? Could just the mouthful of 100% at 50m from a >switched off 2nd stage be enough for a problem, ie a potential spike >while you've no working reg in your gob? > >Phil > As an example, let's say you are going to switch to your 50m mix at 50m. You look at whatever bottles you are carrying and choose the 50m bottle. You open the valve of the bottle that is marked 50m. You take the reg from the bottle that is marked 50m and put it in your mouth. If you can breathe, it is the correct mix. If you have opened the valve on your O2 bottle, the reg from the 50m bottle won't deliver gas. If you take the reg from your O2 bottle and try to breathe it, the O2 bottle won't deliver gas. Actually, though, in cave diving, you wouldn't have your O2 bottle, or any bottle for that matter, more than ~10 feet deeper than the first stop you intend to begin using that gas at. Nanci ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.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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