Loading Air Mail Plane Using Floodlights, Fort Crook near Omaha, Nebraska, 1924

Transcontinental air mail pilots relied on a string of powerful light beacons to navigate sections of the New York to San Francisco route at night. They flew night mail planes equipped with illuminated instrument panels, navigation lights, and landing lights. At airfields along the way, floodlights helped workers inspect the planes, refuel, and unload and load the mail.