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Randy, if you analyze the gas for oxygen after adding only helium and oxygen, you can then calculate the percent of helium in the final mix when you again analyze for oxygen. I can not believe that some dumb ass instructor did not tell you that, but then with this crowd of mutants, math is a big mystery. "Travelling" is insanity - the narcosis sticks for up to two minutes, and just causes a cluster as you switch and go deeper. Only a complete moron wouod recommend something like this. Really a dumb idea. Just do not breath hypoxic mixes at the surface. Put a deco reg in your mouth if you have to wait. Either go up to the surface or down to the breathable level when dealing with a problem - surface is better, but take the bottom reg out of your mouth if siting at the surface. My choice is to use the bottom gas and stay head out at the surface with the reg in my hand. I drop or go up . Your bottles should be permantenly marked, or if you need to change them, take the paint off with a solvent and restencil them - since you are betting your life, this is no big deal. The most effective deco gases are oxygen, 50/50, 35, and the approriate trimix below 120 feet using the appropriate aed and ppo2. I prefer 19 oxygen 33 helium for that mix. Randy, most of the blithering idiots who pretend to teach diving do no real diving themselves and do not have the foggiest idea how to do this. Go get yourself a good intstructor. There are not color codes in a colorless environment - only a total idiot would think otherwise - also no reg colors, little reg jackets, reg markings , or any other dangerous convoluted stupidity that emmanates from boat monkeee, half wit, sodden minds. Adding nonsense like this only gives you more chances to make a mistake, just like thinking that bottles have a significant position in determining their contents. Only the absolute dumbest moron would even attempt to propagate anything this stupid. Seriously, you need a new instructor. I would not let you dive with the WKPP with what you have been taught - you would be a liability to us all. I take this very seriously, and I can tell you that what is being taught is dangerous and an absolute disgrace. Randylabel wrote: > > have a question about gases > still learning about mixed gas diving, in fact after three times in the > classroom, several times in the pool with all the gear and extra bottles, and > two dive days to 100', three to 180', I feel confident about the task loading. > Really, the only time I felt task loaded was in the pool, > Is there best mixes that you use? On a 180' sea dive, we used a 19/26 > bottom mix, air travel to 100' and O2 at 20'. If this seems appropriate, > great but, why or why not. > Something Ken said has me wondering about marking the cylinders. Are your > tanks dedicated to specific gases, so you can paint the MOD on them once? > What is the color sceem of the different bottles, if their is one? > last question; do you analyze more than the O2? are CO, He, N anilyzers > in your tool box? I do realize that the O2 controls the total dive time and > think the He percentage is not critical and does not cause any real problems > so exact percentage can be calculated, and not anilyzed. > > DOING IT RIGHT, means not wondering if I am (Doing It Right) > > learn from experience, > preferably other's -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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