Shortly after the Japanese attacked Pearl Harbor, it was realized that airmarks could be used by enemy planes, so the order was given to remove 2,500 airmarks that stood within 150 miles of the nation’s coasts. Six weeks later, those marks were obliterated, undoing six years of labor—but shortly after, the blanket order was modified. Why? The absence of airmarks was causing military pilot trainees to become lost. The new order allowed airmarks within 50 miles of flight training airfields.
The national program resumed after the war, with improved methods (including government-supplied plywood templates for lettering) and greater participation, but it’s truly remarkable that despite historic advances in communications and airplanes, the airmark system remained in use into the 1970s.
If you’re old enough to have flown locally back then, you might recall some North Country rooftop markings, some of which are listed below with their year of origin. Most were maintained until the system became outdated. » Continue Reading.