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Keven, thanks for beinging this up. If you ( not you , Kevin, you anyone) can not see your bottle markings, how could you swim 15 feet away and come back to them and put them on the right side? This section you quoted is obviously some kind of mixup - it is clearly not usefull, and demonstrates exactly what I was saying: that the instructional community does no practical diving, and makes up things like his to again try to create a solution to a bad practice or self-created problem. The correct answer is to mark the bottles to the maximum operating depth. In a cave, you would not carry the bottle past its marked depth : you would clip it to the line at its marked depth, and then there would be no question when you reached it that it was breathable. Whoever wrote this obviously does no cave mixed gas diving. In the ocean, you would not dive if you could not see your bottles, or you would certainly not plan a dive that required multiple gas switches where you could not see. If you lost your mask, no problem, either your buddy directs you , or you see the three inch high ( at least ) numbers painted longitudinally in the orientation of the bottle on both sides identifying the depth, per WKPP and Doing It Right Standards, not some silly sticker. it is a good practice to stick with the saem deco mixzes all of the time, so as not to make mistakes or mixing or marking. Empty them and start over - oxygen is very cheap. In ocean diving, use smaller bottles and make it easier on yourself. In cave diving, use the regular 80's twice . Even in the worst situation, a properly marked bottle can be read, and even in the worst situation, you don't have to breath all of these gases to get out of the situation successfully, and in real life, you would take a potential hit of DCS before you would take a seizure, now wouldn't you. What divers need to practice is more diving and handling of the gear, not more charlie foxtrots. Thanks for bringing this up - i never see any of this without you gusy alerting me to it. My instructor for this was Bill Gavin, and he issues no "C" Card. Kevin Connell wrote: > > I'm definitly NOT arguing this in any way, I don't proclaim to know anything. > > However, this may be of interest. > > In the IANTD 1996 standards manual, waterskill #4 for the trimix diver is > as follows: (Not direct quote for fear of lawsuit:) > > #4) [While in a simulated blackout remove deco bottles and swim 15 feet > away. Turn around and return to replace bottles on correct side, > identifying by feel.] > > So, is this skill useful? Why or why not? I personally think even in a > silt out, you will still have daylight or artificial light enough to > identify bottles by sight. > > At 05:24 PM 5/23/97 -0400, you wrote: > > 2) Putting bottles with different mixes on different sides as > > as aid to identification, instead of marking the > >bottles correctly in the first place and doing it right. > >This is > > in the same category with putting different colored regs on > > to identify gases, or any other convoluted scheme. > > > > The correct way? Mark the operating depth on the bottle > > the way WKPP does and leave it turned off with the reg > > parked on the bottle until ready to use. Unpark the reg, > > from the marked bottle you want, put it in your mouth > > turn that bottle on. IF YOU CAN BREATH, YOU ARE BREATHING > > THE RIGHT GAS. > > -------------------------------------------------------------------------- > Kevin Connell <kevin@nw*.co*> > > Northwest Labor Systems > http://www.nwls.com > Bellingham, WA > --------------------------------------------------------------------------- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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