On 07 December, 2015 - Miika Turkia wrote: > Hello Robert, > > it seems that the calculated TTS does not correlate with the time it > takes to surface from a dive. I have planned a simple dive with > following parameters: > - drop to first depth > - EAN31 > - duration 20 min > - depth 40m > - Bühlman algorithm > * TTS is shown at the end of bottom time as 15/16 minutes, however > surface is reached in 10 and half minutes as shown in the attached > screenshot. > > VPM-B seems to behave similarly, but the TTS and actual ascent are > closer to each other with my test dive (as ascent is slower with > VPM-B). >
The accent speed is different in the tts code. Its 12 m/min to the first deco stop and 1 m/min between stops. Thats probably the biggest source of the discrepancy. If you match up your ascent_mm_per_step and ascent_mm_per_deco_step with your planer prefs it will probably match up way better. Its also only re-calculated every 30 seconds. //Anton -- Anton Lundin +46702-161604 _______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
