I went to the site and used their magnification. It seems to be oblong and irregular shaped. The land you see in the middle ground is a series of marsh islands and behind that is Colington. There was not much at all on Colington at that time. Maybe someone who was around then could tell us what that was. UFO, blimp, giant jumping mullet, or really a water tower. It was probably war-time or slightly after so it might have been something related to that.