Ouch! Yep, I've got random crush depth enabled, and the LRT mod. (By the way, anyone know if v2.04 includes the seabed repair mod?)
I really was shocked when I saw it go down past 200 meters, much less 300+

(Shame I didn't think to get a screenshot, that would've been my new desktop lol) Only time I went deeper was in a Type XXI, and that was pushing it.
What can I say... they build them well at AG Weser!