I suspect it is Rubini's Harbour Traffic mod that's responsible, since this has happened to me (just once!) and I'm not running the Airpower mod. It was at night and it was at Wilhelmshaven, but I'm not sure what type of aircraft were attacking as I'd already crossed the bar. Made for a nice fireworks show in the distance, but I decided to play it safe and pull the plug, especially since it was my first Wolves at War patrol and I didn't want to get killed by a fluke air attack leaving port.
