So this is what happened. All the sudden, the boat stops and although I clicked the telegraph several times, a message sayint "unable to comply" appeared repeatedly. The sub simply stays there, unmovable. Since there was a proper in-game response, I though "what the heck, this can't be a bug".
I ran a check-list and, voilá, I had forgotten the "battlestations" order checked. Those poor guys where awake non-stop for several days already.
I checked-out the battlestations alert and the problem was solved. I ordered ahead standard and along went the boat.
I was stupid not to check the crew's morale, that only occured me now. neither did I immediately re-ordered battlestations, just to see if they would refuse to go along again.
So, what happened here? Bug? Mutiny?
