Well I've just had my most satisfying attack yet. Found a large cargo off the north of Scotland being escorted my an armed Tug. Put an eel into the cargo and went to 25m. The tug came to investigate so I turned at 90 degrees to his track. Soon as he passed over me I blew ballast and surfaced behind him manning the deck and flak guns. I took the flak gun personally
He couldnt bear his main gun on me although his machine gun opened up. I cut him to pieces. He hadnt even turned 20 degrees before he sank! Then back to the cargo, 10 rounds and down she went. Very very fulfilling
Of course I saved first in case I cocked up