So am I right this is actually standalone? I think the physics do not work. Boat crashdives in 20sec and everything else feels like stock physics.
And when submerged i have a white square above my uboat:
Graphics are nice and the voice is finally in the right language!
Edit: Turning rate seems good. Crash dive and blow ballast sounds seem to be played twice and are overlapping.
Any engine setting higher than ahead standard is not displayed. It sticks to ahead standard even if you go full or flank.