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The selling would need to be done to the rec diver. The agencies will catch up eventually. Hell will be a walk in the park on an autumn day compared to getting the big agencies to go for any of this without massive diver pressure. :) If this is made absolutely idiot proof, only absolute idiots will use it. :) If the idiots can't observe limits, perhaps the species is better off without them. By fiddling with Z Plan with zero conservatism, I come up with shorter no stop limits with 21/26 than I come up with air. That's a tough sell. The extra oxygen would be needed to make the no stop limits longer. The time for 26/30 looks to be pretty close to air at 130. The MOD is 144 and the END is 91. That would be my second choice. 28/35 (MOD 132 and END 85) gives a definite advantage over air for no stop bottom time and I think that would be crucial to selling this to the public. Around here (Norfolk, VA), we get blown out on about a third of our rec dive trips and damn near half of our tech trips.. So making the most of a trip to a wreck 20 miles offshore would be a big selling point Nitrox is very popular here for that reason. My favorite shop hits for $15 for rental of a Nitrox filled steel 125. Twice that for 28/35 would be okay with me since it would only be used for at or near 130 feet. More oxygen and less helium for shallower dives and no helium at all shallower than 80 feet would bring the costs down even more. Taking 28/35 for a dive to 100 feet wouldn't be the best use of money, but if you can't make it to the 130 foot wreck that day due to weather, it's not out of the question. It isn't a matter of what this would do to the gas cost, but what it would do to the total dive cost. If another $40 can make a $100 dive trip signifigantly better, many will jump at it. Building a surface interval table for helium mixes _can't_ be all that hard. Dammit, this is the 21st century and the spreadsheets are already out there. Don Burke Chesapeake, Virginia > From: David B. Widen <dwiden@ho*.co*> > Good thought. It will be hell to get the rec agency to support. > I ran some of the numbers through Deco Planner and some other > calculations. > > To more closely track air and without penalties a 21x24 works with END of > 80 > IAW DecoPlanner and END of 90 if you calc with N2 & O2 as narcotic gases. > Without building the whole tables w/SIT and repet groups. There are > several > general mixes that would work well. The Normoxic value would serve the > uninformed or hard headed person who exceeds 130. It would also support > and assist in the transistion of new divers to this type of dive gas and idea. > > Type Cost: 21x24 $.215/cuft 21x30 $.252/cuft > AL80 21x24 ~$17 21x30 ~$20 > ST95 21x24 ~$21 21x30 ~$24 > Cost increase 3 to 5 times without over fills. > > David _____NetZero Free Internet Access and Email______ http://www.netzero.net/download/index.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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