 One can imagine that aircraft approaching the coast would be spotted by multiple posts, resulting in multiple Flash Messages and, therefore, a reasonably accurate triangulation of position, speed, direction, altitude, etc.The training and intense watching bore dramatic fruit in the autumn of 1943 when observers at a post in West Palm Beach, Florida, saw and reported instantly the passage of a German aircraft bearing American markings over their post.The fact that the plane was one that had been captured in Europe and was being flown back to this country for examination detracted not one bit from the effectiveness of the recognition instruction.