<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi,<div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On 22 Aug 2015, at 07:15, Rick Walsh <<a href="mailto:rickmwalsh@gmail.com" class="">rickmwalsh@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">To show what this actually does to the calculated profiles, I have made a new column on the Google docs spreadsheet Robert set up.<br class=""><br class=""></div><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">This gets the calculated profiles noticeably closer to those calculated by other software, except for the multi-level dive (20m for 10min, then drop to 60m for 30min). I think the small difference might be related to use of Schreiner vs Haldane equations in the change in levels, but could be wrong.<br class=""><br class=""></div><div style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Note that this change alters the first_stop_pressure used for the Boyle's law compensation. The way the profile is calculated, if we get to that depth but can ascend to the next, then we do.<br class=""></div><br class="Apple-interchange-newline"></div></blockquote></div><br class=""></div><div class="">another excellent catch by Rick! Dirk, I think this patch did not yet make it into master.</div><div class=""><br class=""></div><div class="">I have to admit, I had considered testing this way to determine the first stop pressure as well (which should get first_ceiling_pressure to be more accurate) but dismissed the idea as too crazy. But the computed profiles prove me wrong.</div><div class=""><br class=""></div><div class="">In case that was needed: </div><div class=""><br class=""></div><div class="">ACK.</div><div class=""><br class=""></div><div class="">Best</div><div class="">Robert</div></body></html>