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Depending on what the xml looks like, Subsurface might be able to read that. If you use Excel or LibreOffice to convert the .xls, Subsurface will be able to import that. You can email me the .asd file to helling@atdotde.de and I can try to figure out the origin of the crash.

Everything you are looking for including the calculation of the surface GF is in the Subsurface source code, in particular in subsurface/deco.c at master · subsurface/subsurface and subsurface/profile.c at ecfbf2a9ba51905a6915ba526979130ac134b744 · subsurface/subsurface In particular, it...

As this thread is reviewed, I can add one data point: I wrote large parts of the Subsurface decompression code and have been maintaining it for a number of years. I am not a professional software engineer nor computer scientist, I do this as a hobby. My training is that I have a PhD in...

Today, I had to realise that my script had a wrong formula (not in the real gas part but in the part that calculated the pressures after the individual steps). It's fixed now on https://thetheoreticaldiver.org/rch-cgi-bin/blender.pl and on Github.

I am still amazed of the prize of a pair of E/O cords given what is contained in those. And the cables, they do break.

A couple of years ago, I experimented connecting a piezo speaker to the regulator mouth piece to use via bone conduction but unfortunately that did not yield good enough results. So I gave up again.

I wouldn't spend too much thought on it. I think Gareth's comment is the most important one: It is considered to be practically easier to hold stops at fixed depths rather than follow a continuous ceiling. That's all. There is no more theory behind this. And the fact that everybody uses stop...

I am sure the GERG-2004 model is much better researched than the Subsurface calculation (which is not really a model) and has much broader applicability. It is a model because it has a theoretical background (and justification for all the possible terms). I should say, however, that research...

Just a quick heads up: I updated the script on https://thetheoreticaldiver.org/rch-cgi-bin/blender.pl that it can now handle trimix blending as well.

I claim it works as it should. The long version of the dive is limited by gas. Ignoring the amount of gas available would be an infinite time at that depth. The difference between the two versions is in the 19min half time tissue (as you can see by reading the info box carefully): If you spend...

I turned my calculation into a perl script. You can use a web version on https://thetheoreticaldiver.org/rch-cgi-bin/blender.pl

After a DM discussion, I think I have to update my calculation. The problem is that the statement "you have to top up with x bars of EAN34" is ambiguous exactly because EAN34 is not an ideal gas and the same amount of gas at say 20bar is not the same as the difference between 250bar and 270bar...

My suspicion is that life is a bit easier using the metric system and being able to handle the rule of three.

I think you want a real gas model, not necessarily van der Waals. As it turns out (tried it for you: When real gas corrections matter – The Theoretical Diver), the two parameter van der Waals model is not good in computing the compressibility (1-Z) for gases used in diving in the range of...

OK, I did the real gas calculation in mathematica. My notebook (containing other calculations dealing with gas density, that's for another day) is here: Wolfram Cloud Turns out (I had to make an assumption about the the pressure of your EAN34 cylinder) that it's closer to 67bar of EAN34 and...

The assumption of having ideal gases at 270bar as well as the assumption that the temperature does not change are probably both quite bad in reality, so this is mostly of academic value. I would do this in a spreadsheet, here is my example attached. Have a look at the formulas, I arrived at it...

As others said, the NDL is very likely just an indicator of your fastest tissue. If you use it up at the max depth and don't want to go into deco, then that's it. But it's a different thing if you say, I leave max depth 3min before I run out of NDL and start to ascent. If you do that fast enough...

Adding to that, you can supply Subsurface with your own template if you feel inclined to. Then you can fine tune it to look whatever you like. You can either do that in html (in the print function) or use TeX export together with a TeX template.

Subsurface has tags for dives you can use to categorize dives like you do in Dining Log. It is also possible to add pictures and videos and there is an easy Upload to divelog.de

Of course, but I would like to explore how far one can get. Like manually correct a few images in a dive and then do the others automagically.