Workers in this unit group fly aircraft, direct the course of aircraft in flight, inspect, adjust and regulate during flight the mechanical equipment of aircraft and give flying instruction. Their functions include: flying aircraft to transport passengers, mail or freight; flying aircraft for testing or delivery, aerial spraying, aerial surveys or photography, and exhibitions of flying skill; navigating aircraft in flight; inspecting mechanical and other equipment of aircraft, making adjustments and minor repairs, monitoring control panel during flight and regulating engine speed according to pilot's instructions; teaching trainee pilots to fly aircraft.