Keywords: US Navy 040221-N-4936C-008 Air Traffic Controllers on duty at the Naval Air Station Joint Reserve Base Willow Grove, Pa., air traffic control tower.jpg en Naval Air Station Joint Reserve Base Willow Grove Pa Feb 21 2004 Air Traffic Controllers on duty at the Naval Air Station Joint Reserve Base Willow Grove Pa air traffic control tower AC s assist in the essential safe orderly and seedy flow of air traffic by directing and controlling aircraft They operate field lighting systems communicate with aircraft furnish pilots with information regarding traffic navigation and weather conditions as well as operate and adjust ground-controlled approach GCA systems and interpret targets on radar screens and plot aircraft positions U S Navy photo by Journalist 3rd Class David P Coleman RELEASED 2004-02-21 040221-N-4936C-008 Navy http //www navy mil/view_image asp id 12060 U S Navy photo by Journalist 3rd Class David P Coleman PD-USGov-Military-Navy Naval Air Station Willow Grove Air Traffic Controller United States Navy |