Happened on Patrol last night. Had just taken out a few merchants when 3 destroyers made their way on the scene. Went to 50 meters, stayed quiet until the passed. Surfaced and got a 4th contact. Bad weather so he was outside visual but I could see him spinning around like a top. Moved in to see what was going on, he kept distance. No matter where I went he stayed at the same distance spinning around in circles.
Got tired of having my crew constantly calling him out so I started moving towards him to torpedo him. Couldn't close the distance and he ended up crashing into the coast of France.