Got my type XXI 3 cruises ago. What a piece of work.
This last convoy I hit just north of Ireland I just drove straight in. Escorts didn't spot me, but aircraft did and bombed my position. So I just went flank speed and started spitting out torpedoes in the midst of the convoy like a cowboy with a six-shooter.
I was nailing ships and weaving in and out at 15 knots. It was like a skier doing slalom. It was such chaos something happened I have never seen before - the escorts were depth charging where I was not. The AI was actually confused and bombing randomly. Those escorts had no idea subs could move like mine!
Eventually they were on to me, and now they've got those pesky hedgehogs and they nailed me down to 67% hull integrity and killed one of my creeper motors.
That's okay-dokey, though, because I had loaded up with 8 or more Type V homing torpedoes. We were spitting those things out faster than watermelon seeds on a hot summer day.
Eventually all the chasers were gone and I went back and re-visted a couple of tankers that had not yet sunk.
I ended the mission with some 44,000+ tons sunk including 7 warships, a whale factory ship, a large tanker, and a few smaller tankers.
Really the acoustic torps are way overpowered.
I actually watched one on the tactical map bounce off the screws of a destroyer 2 or three times, stop in the water, and start up again chasing again!
Eventually it went off taking the escort down.
I like my Type XXI!
Steve