Guess I should expand on my story a little. I was sitting 2000 yards of the port side of the sweeper, the weather was clear and it was dusk. I had been sitting at periscope depth, not moving at all for atleast 10 minutes lying in wait ( I had end-arounded them and set up my trap) There was no periscope up since my last peek when they were over 6000 yards away from me (bearing 55°) and then, like I said as soon as the sweeper hit the 0° bearing it was like he was shot out of a cannon right at me. I was honestly at a loss as to why he came and what to do, my shot was less than 15 seconds away but I couldn't very well stay at periscope depth and be DC'd.. grrr sometimes the AI in this game is annoying