Animate them!
This mod is crazy, makes the game already 10 times more immersive. Heretic, i would even donate you some $ if you could animate all commands for the sub + damage + flooding. People running around if you order crash dive. people crashing to ground if the sub gets hit etc. Or people walking around the deck if its surfaced and no battlestations on.
Most of it shouldnt be so hard because the animations are already all there