I have been playing for about 13 hours straight yesterday and about the same the day before. I started on Wednesday. I have about 14 patrols done, that is why I am in 1941.
I tend not to follow assignments, I tend to go on my own and torpedo ships in harbors. Sank the Revenge Class Battleship 2 times already in Scapa Flow. I am stationed at Kiel but I tend to go to "Bergen Temp"



This is what i mean when I say that the ships are "white" in the recognition manual.
I do stay on the ocean floor at about 90m or 80m at 0 knots but my submarine bounces and i keep taking damage.