Just remembered another one
Going through the Kiel canal at 10 knots in 300-400m visibility we almost crashed into an small tanker that had drifted into the middle of the canal. After doing an perfect left, right, right, left maneuver past it, cursing her captain, I ordered back to course and returned to my coffee.
The next moment the boat crashed into the left bank and that was the end of a glorious career, boat lost
The crew tried to do an 180 to get back to the way point we passed in the process. Did not think of that, my fault