> On Mar 28, 2019, at 7:13 AM, Willem Ferguson > <[email protected]> wrote: > > I am considering writing some code that enables one to provide the > atmospheric pressure or altitude for a specific dive. That enables a more > accurate representation of gas partial pressures in the dive profile, and > possibly the ceiling calculations. The motivation for this is that, in this > country at least, there is quite a bit of inland diving and atmospheric > pressure is really required to do a good evaluation of the deco and the > profile. In the planner one can specify the atmospheric pressure and that > makes an enormous positive difference. Divers will possibly not always have > atmospheric pressure data (unless they owned a Petrel or similar) but they > would almost always be able to provide the altitude of the dive site. At > least this would be a first approximation that would be quite a bit better > than assuming sea level.
I believe we already store surface pressure. https://github.com/Subsurface-divelog/subsurface/blob/7635ee3e776f7adb96dda70ea21920569368ae30/dives/ostc.xml#L17 <https://github.com/Subsurface-divelog/subsurface/blob/7635ee3e776f7adb96dda70ea21920569368ae30/dives/ostc.xml#L17> So I believe what you are suggesting comes down to having a UI element to actually edit that information, correct? > > There are some problems, though. Most importantly, where in the UI to insert > a text box or dropdown box? The screen is already pretty full as it is. > Personally I am not very positive about the utility of the air temperature in > the dive UI and I am not convinced it is being used a lot. My suggestion > would be to replace the air temp box with one for altitude/pressure. Stating that this is more useful than air temperature is simply a personal preference. I think that a lot of recreational divers might find the temperature more interesting, TBH. You could make it a preference which one to show. Or we could create a new tab that offers some of the other things that are less frequently used (and for example move air temp, OC/CC selection, and surface pressure all to that tab). I'm curious what others think /D
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