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Phil, When you encounter a bottle in the water, what do you need to know about it? Is it safe to breath from it at my current depth. Having the MOD clearly marked on the bottle is the best possible approach. For those who mark just the O2 fraction, they still must calculate the MOD, and decide whether breathing from the bottle will break PO2 limits. Calculating MOD should be done topside, not while in the water and trying to do a multitude of other things. This stuff is the basics.. If divers can't figure out how tanks should be marked, they should go back to their techie instructor and ask for thier money back. As for MOD being in Imperial or Metric, well.. If you can't figure out what phreaking country your in, and what the measuring standards are in that country, then your a lost cause and should get out of diving before you kill yourself or your buddy. Safe Diving At 11:07 07/08/1998 +0100, Phil Clarke <phil.clarke@bt*.bt*.co*.uk*> wrote: >>> All stage and deco bottles must be marked with 3" MODs on both sides >>>of the bottles so that the MOD is easily visible to other divers while >>>submerged. > >Bill, > >what's the argument for this, rather than %O2? (I assume we're agreed, >insufficiently marked stages are suicidal). Do you have favourite mixes >for a given MOD (I have visions of sport divers painting MOD 66 on their >air bottles) or is it decided for each dive plan? > >more importantly, how does one avoid putting the wrong reg in the mouth? >When someone brains themselves with the wrong stage I'm at a loss to see >how to prevent them - they're trained, they know what 80% means. > >In recent incident reports people have managed this even with different >shaped regs. During the sidemount thread different hog'ers advocated >wearing stages stacked deepest closest and shallowest closest. > > >final point: how about a marker on your MOD's to clarify they're in >feet? Being English and calibrated in meters, if I found a bottle marked >120 at the bottom etc ... intuition may tell me it's too small to be a >useful 360' bottle, but this requires more thinking than "20% O2, not >right" > >>Phil >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > Sid.Dive@Ib*.Ne* Toronto, Canada -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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