<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi,<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 14. Nov 2021, at 02:40, Dirk Hohndel via subsurface <<a href="mailto:subsurface@subsurface-divelog.org" class="">subsurface@subsurface-divelog.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="Singleton"><blockquote type="cite" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Based on my manual calculations (discounting compresability and assuming ideal gas laws), I calculated 1.13 l/min but, Subsurface is showing 3.3 l/min.<br class=""><br class="">I am normally around 0.65 L/min but, I did an O2 flush that skews this dive some.<br class=""><br class="">Dive time: 35 mins<br class="">Average depth 34 feet (CCR ~ does not matter)<br class="">Oxygen consumed: 492 psi<br class="">Cylinder: 3L @ 3442 psi (237.3 bar)<br class=""><br class="">* I was working out a new gear configuration or else I would have not been on the rebreather for such a short dive.<br class=""></blockquote><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Maybe Robert has some comments? Or Linus?</span></div></div></blockquote></div><br class=""><div class="">my initial reaction is that there shouldn’t be a calculated SAC value for rebreather dives. Or at least, if we computed something for O2, that should be a completely different calculation as it would be independent of ambient pressure. But I have to look at the source code to see what we do there really.</div><div class=""><br class=""></div><div class="">Best</div><div class="">Robert</div></body></html>