On Sun, Jul 05, 2015 at 10:28:23AM +1000, Rick Walsh wrote: > > > Note that the example you gave used 38% rather 36% as the first deco gas. > Also, by saying the VPM "benchmark" profile had a bottom time of 30 > minutes, I meant the ascent started at 30 minutes runtime. Definitions of > bottom time vary - sorry for not clarifying before. I also didn't mention > that the benchmark took final stop depth as 20 ft.
Oh wow. So that changes things a bit. Maybe Jocke will be so nice to re-run them with those changes? > This is incredibly similar to the VPM benchmark runtimes. At worst it > differs at each stop by 1 minute. Note that the benchmark has a 20 s stop > at 180ft, we continue to 170 ft, but both plans reach 170ft at exactly 33:18 Is that an indication of different ascend speeds? > > I'm not a serious tech diver (even though I'm TriMix certified - I just > > never do it). If anything in this sample is stupid (or if we should test > > different parameters), please modify accordingly. > > I'm still a learner tech diver (halfway through TDI Adv Nitrox and Deco > Procedures), so definitely not a serious trimix diver. Hehe, I semi-frequently am a dive master for this class. It's one I enjoy, espcially on the last dive with the students on air completely narced out of their minds and me on trimix having a great time watching them :-) > > oddly, 4.4.2.955 gives me not only different formatting (that was an > > intentional change) and still the wrong line for the oxygen change, but > > also slightly inconsistent run times (all parameters were set identical); > > check out the run time at 79ft or the total run time... > > I think that will be due to my earlier patch (commit > e5a4b5a61838d7c3f95856ce11c21fe7aa992eb4), to end deco stops on whole > minutes of runtime. It is possible but less likely that adjusting the > timestep (48aa0bdfd0450b6a51b4f2aa18f65b91b8b361b0) to 2 seconds, might > have had some effect. Given that none of this is hard exact science, I don't think the changes are worrying. Thanks for helping to explain where they came from. /D _______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
