Odd behavior for an airplane indeed...
While leaving the harbor for our third cruse.. I hear a couple of airplanes circling. I usually try to spot them to see whats flying over. I looked all around and found these two German fighters in the water swimming about like flies in your soda-water. I later went in to get a closer look , then hit one with my sub.. the conflagration was pretty intense even though the sub never took any damage.
Im resizing some photos, Ill post them in the morning... this is a video of the plane swimming along on fire.