Once you are detected you need to go deeper than 80M. Once I'm detected I go to 140M and give up the attack until I can break contact. Then if possible I work my way into position for another attack. Even early in the war I suggest you go deep. I encountered a large convoy in Oct. 39 that had 6 sets of high speed screws but atleast one of them was a cruiser. Try RuB 1.45 I think its better than 1.43, better convoys.
