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Scott, From the replies I have received, apparently a few people have already been doing this for a while with no problem. I just wish that I had done this exercise sooner. Another thing I started to work on is plot all of these deco schedule on *1* single chart. X-axis is "end-of-run-time", and Y-axis is "depth". Depending how good your eyes are, you could see *all* of the deco schedules in one shot. You will see some overlaps, trends, etc., and I will leave you guys to draw your own conclusions. The next step is assume a reasonable surface interval period and add curves to this matrix. There should be some overlapping with the next depth/BT curve depending on the SI. I know it took a few hours of work, but I won't need to calculate each time any more. In addition, I have included the mixing PP on the table for the BT trimix, so I could mix the gas as well without whipping out the calculator. Lastly, GUE Decoplanner/Decoblender made it so easy to do this exercise with its super-easy-to-use interface. It is the best planner I have used so far. -Phi -----Original Message----- From: Scott Gudmundsen [mailto:gudmund@si*.co*] Sent: Monday, April 24, 2000 4:17 AM To: Phi Le Cc: techdiver@aquanaut.com Subject: Re: Deco in your head ? Phi, Best post I've read for several months! Thank you for sharing! I've often wondered how the heck he does that, too. Apparently George's brain is programmed for numbers and tables anyway, as he's some kind of financial/stock broker type number cruncher when his hair is drying and his tanks are filling... maybe he'll tell us what he does to pay for helium once he reads this post! Scott Gudmundsen Vernal, Utah ----- Original Message ----- From: Phi Le <phi@sk*.be*> To: List - Technical Diver <techdiver@aquanaut.com> Sent: Sunday, April 23, 2000 4:50 PM Subject: Deco in your head ? > I am sure a lot of people already done it, but just want to share something > for the guys haven't yet... > > A while back, George was posting about he had somehow calculated his deco > schedule in his head *while* decoing in the water. I thought to myself "How > the hell do I learn how to do that ?" > > And I still haven't a clue until I did a little project over the Easter > week-end with the GUE Decoplanner. I wanted to create a set of trimix tables > so I don't have to fire up the laptop everytime I need to calculate the deco > schedule. > > So I decided on a fix MOD PPO2 (1.2), a fix END (30m) and fix 2 deco gases > (50, 100%) to be used independently of MOD. For each increment of 5m from 50 > to 100m, I calculated the deco schedule for different BT in increments of 5 > min. I also generated alternative schedules for each step if I had lost one > of the deco gases. In addition, I generated tables for each BT gas at PPO2 > of 1.4 (10m more) in case of needing to go deeper for whatever reason. > > After a while, I could "guestimate" the deco schedule of the next depth or > BT increment pretty accurately. > > I am not saying that I could calculate my schedule in my head like George, > but if I had dropped the deco table (done it before) I could whip out > another table for another depth or time, estimate it accurately and not be a > decoweenie. And I feel that I only need to memorize 2 or 3 tables and could > inter/extrapolate the rest easily. > > I guess the tough part will be when I add a third deco gas for the deeper > dive. Wonder how that would affect everything so far ? > > If you see any flaws, please comment. > > -Phi > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.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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