"Crewing" - I am clueless. I sort of know the files, but probably only enough to crash the computer (my forte). If on the surface and not at battle stations, see if the helmsman isn't top-side, close enough to the skipper to be kicked...
As for the sonar, especially early war, they don't work if on the surface. I'm not sure if lurker included further "depth sensitivity" effects or not. I do know he was conversing with a member back when about doing that, to where it didn't work on the surface at all, only worked partially, up close, when at periscope depth, even better at 60 meters, and was at its best at 100 meters. He might mention that in the ReadMe somewhere, or it might be mentioned in OM or RSRDC, which were all being worked on and updated simultaneously (
)...
