Atmospheric pressure data in the dive log.

[Willem Ferguson]

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.

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.

Any comments?

Kind regards,

willem



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