[Sonarman]

This happened to me too when I tried to dock manually my sub hit the wall and I was suddenly standing inside the pen , Click the anchor symbol if visible and select "dock at Kiel" You may or may not then get a breifing from the Captain. I tried to talk to others after this and got no response and what I did was to save the game return to the menu and than re-enter the campaign and all was well.