This is plain stupidty then reckless.
After a tiring patrol in my VIIB. It was very slow because of endless patrolling hurricanes and bombers to AM32. sank 2 merchants on the way, but when i'm just about out of the dock i was attacked by 2 swordfish torp bombers

. Lost 1 crew as both planes scored direct hits.
As i arrived home it was ~2am and stormy. couldn't see where i was going, i spotted the 2 lighthouses and set a course inbetween. It was slow so i fast forwarded, then i noticed something was wrong, in front of me is the harbor wall, and i am flanking towards it on 32 times speed

...and you can guess what happened next...
UBOAT LOST DUE TO COLLISION...