If you fish the Iluka/Yamba area in northern NSW you'll be used to them roaring over head at all hours of the day and night. They practice their bombing runs on the old firing range (now national park) on the coastal strip between Woodburn and Iluka. They often come in threes and if your fishing the beach at night you can follow them by their nav lights as they make their runs and then circle back out to sea.
Cheers Freeeedom