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I probably scrwed something up, 'cuz I don't use it myself, but here's what zplan came up with with a single setpoint of 0% conservatism, and 130fsw, 40min, Air: Waypoint at 130ft for 40:00 (42) on Air, PPO2 1.036, END 130 Norm Stop at 30ft for 6:06 (52) on Air, PPO2 0.401, END 30 Norm Stop at 20ft for 56:00 (109) on Air, PPO2 0.337, END 20 TOTAL DECO TIME: 62 minutes. DIVE RUN TIME: 108 minutes. CNS Total: 15.1% OTU's: 44 Time to Fly: 8.0 Hours A little conservative, no? I don't have decom here, I'm out of town. At 04:54 PM 9/28/98 -0400, you wrote: >Steve- > >Here's some Decom generated tables which when scrutinized should provide >your answers: > >Here's an air dive using no accelerated deco: > >Depth Time DT TT O2/HE/N2 PpO2 CNS% TCNS% GAS BRate > 130 40 40 40 21/ 0/79 1.04 14.5 14.5 138 cf 0.70 > 40 2 45 45 21/ 0/79 0.46 0.0 0.0 3 cf 0.70 > 30 6 51 51 21/ 0/79 0.40 0.0 0.0 8 cf 0.70 > 20 13 64 64 21/ 0/79 0.34 0.0 0.0 15 cf 0.70 > 10 22 86 86 21/ 0/79 0.27 0.0 0.0 20 cf 0.70 >OTU'S = 0 >CNS % = 14.5 >TOTAL DECO TIME: 43 >Ascent Time : 3 >TOTAL GAS USED : 184 cubic feet > 21/ 0/ 79 184 cf > >-------------------------------------------- >And here's the dive using 20/20 > >Depth Time DT TT O2/HE/N2 PpO2 CNS% TCNS% GAS BRate > 130 40 40 40 20/20/60 0.99 13.0 13.0 138 cf 0.70 > 40 3 46 46 20/20/60 0.44 0.0 0.0 5 cf 0.70 > 30 6 52 52 20/20/60 0.38 0.0 0.0 8 cf 0.70 > 20 15 67 67 20/20/60 0.32 0.0 0.0 17 cf 0.70 > 10 26 93 93 20/20/60 0.26 0.0 0.0 24 cf 0.70 >OTU'S = 0 >CNS % = 13.0 >TOTAL DECO TIME: 50 >Ascent Time : 3 >TOTAL GAS USED : 192 cubic feet > 20/ 20/ 60 192 cf > >------------------------------------------------------- >------------------------------------------------------- > >Now here are the same dives using accelerated deco- > >Depth Time DT TT O2/HE/N2 PpO2 CNS% TCNS% GAS BRate > 130 40 40 40 21/ 0/79 1.04 14.5 14.5 138 cf 0.70 > 40 2 45 45 50/ 0/50 1.11 0.8 15.3 3 cf 0.70 > 30 4 49 49 50/ 0/50 0.95 1.2 16.5 5 cf 0.70 > 20 6 55 55 100/ 0/ 0 1.61 14.3 30.9 7 cf 0.70* > 10 9 64 64 100/ 0/ 0 1.30 5.0 35.9 8 cf 0.70 >OTU'S = 31 >CNS % = 35.9 >TOTAL DECO TIME: 21 >Ascent Time : 3 >* DIVE HAS EXCEEDED 1.5 PpO2... >TOTAL GAS USED : 161 cubic feet > 21/ 0/ 79 138 cf > 50/ 0/ 50 8 cf > 100/ 0/ 0 15 cf > >And the 20/20: > >Depth Time DT TT O2/HE/N2 PpO2 CNS% TCNS% GAS BRate > 130 40 40 40 20/20/60 0.99 13.0 13.0 138 cf 0.70 > 40 2 45 45 50/ 0/50 1.11 0.8 13.9 3 cf 0.70 > 30 4 49 49 50/ 0/50 0.95 1.2 15.1 5 cf 0.70 > 20 7 56 56 100/ 0/ 0 1.61 16.7 31.8 8 cf 0.70* > 10 10 66 66 100/ 0/ 0 1.30 5.6 37.4 9 cf 0.70 >OTU'S = 34 >CNS % = 37.4 >TOTAL DECO TIME: 23 >Ascent Time : 3 >* DIVE HAS EXCEEDED 1.5 PpO2... >TOTAL GAS USED : 163 cubic feet > 20/ 20/ 60 138 cf > 50/ 0/ 50 8 cf > 100/ 0/ 0 17 cf >----------------------------- > >As you can see when using accelerated deco you can treat 20/20 like air. >And you can also see that when diving the deeper depths for any time at >all accelerated deco is the way to go as well, unless you like hanging >there for an hour... > > Jim > >Sender: Steve Lindblom Date: 9/28/98 10:57 AM > >>If one were going to use trimix in the deep rec/lite tec range, as many >>have been advocating here, for moderate exposures, , say, 100-160', 20-40 >>minute bottom, and wanted to have a fairly standard mix to use rather than >>doing a different mix for every dive, what would one use? >> >>- 17/17 poor man's trimix aka heliair >>- Cobb's 20/20 >>- a nitrox-style hyperoxic trimix, say, 28/30 or thereabouts >>- a real trimix, say 17/30 >>- other ?? >> >>How would one plan the dive: >>- available tables (which?) >>- Cobb's 20/20 tables (which don't exist yet?) >>- custom computer-generated tables for each dive >>- air/nitrox tables or computers, and ignore the He. >>- other? >> >>I have no opinion or agenda here, just curious about how ready trimix is >>for use by the non-hardcore-techie. >> >> >> >>-- >>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >>Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. >> > > > ------------------------------------------------------------------- > Learn About Trimix at http://www.cisatlantic.com/trimix/trimix.html > > >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. ----------------------------- Kevin Connell <kevin@nw*.co*> NW Labor Systems http://www.nwls.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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