What attack do you prefer?

[IceGrog]

I had once read that Otto Kretschmer said the best way to attack a convoy was to be inside it, I figure he had the most tonnage so he knows what he talking about. I’ve been trying to get inside for all my convoy attacks but inside my mobility is cut down and I can’t get a perfect 90 angle on the ships, and I see many of torpedoes just bounce and slide down the ship’s side without exploding. And then there’s the escorts they are always in the area close by and I don’t have enough time to dive to a safe depth before they start pounding me. I’ve tried to get in front of convoy and just wait for them to come to me, which is ok but when I take a head shot like that the ships can turn to easily away from the torpedoes and again my torpedoes just bounce away.
Now my last convoy I decided to attack from outside the convoy. I was able to get a good side shot on a big tanker, she went down and I was able to dive before the escorts got there.
So what do you men & women prefer, or what is your favorite way of attacking a convoy.