[oscar19681]

To be quite honoust i,ve never seen them in action. I,ve seen some blue sub icons on map but there allways to far away from my current combat zone. When i usually find a convoy first thing i do is send a contact report and stalk the convoy for days and nights till i dont have a single torpedo left . All i can tell you that even stalking convoys for days on end there never was a single other u-boat to join the fight, let alone a whole wolfpack.