The Theoretical Diver

What factors influence the probability of a dive leading to DCS?

Let’s interrupt the regular program for a short commercial break: Veronika Sievers and Dominik Elsässer have turned their Punkfish online seminars into writing and finished a book on decompression theory: So far only in German, it covers everything from t…

In the past, I have talked about the poor empirical data underlying the NOAA limits for preventing CNS oxygen toxicity.

On Thursday, I took my daughter to the movies and we watched “Mission Impossible 8: Final Reckoning” which as my dear readers will be aware of involves an extensive under water chapter.

I understand the kids today use generative AI for everything.

Here is an email I wrote to the Subsurface mailing list in response to the suggestion to offer the option to display gas use (SAC or RMV) in units of pressure drop per time even when you use only a single cylinder size: There are two separate issues: One…

Not a lot of new content here recently.

It has been very quiet here for a while.

This post is a copy from an answer in the Subsurface support forum but I post it here as well as this point comes up over and over.

As mentioned before, gases in diving cylinders are not only not sufficiently well approximated by the real gas equation but also the van der Waals equation, despite its prominence in thermodynamics teaching, is not doing much better.