Currently I'm at grid AN3655 keeping course 266 it's already night and first unkown contact has been spoted. However I raised SH3 window about 10 minutes later which was minimized and I couldn't hear the Shiff Gesichted message, so it was a delay of actions.
Visibility was 9 km at clear night but I couldn't see the target because of delay.
Chase has begun. Changed course to last known position flank speed, after 5 minutes periscope deapth full stop and I listen. Small ship engine could be heard, adjusted course, surface the boat, flank speed. About five minutes later I spoted dark smoke appearing above the horizon, it was:
I was almost sure it's neutral but I was too eager to make sure to let him go so I continued to chase him. It took quite a while since he was moving away from me doing his best at 9 knts
As I approached close enough to be able to see the flag it turned out to be Norwegian vessel..
Made a U-turn and droped the speed to ahead standard..
Continuing patrol.