38
radio communication services for aircraft navigation; satellite and electronic transmission of messages and data for aircraft navigation; operation of communications facilities and networks for aircraft navigation
39
air traffic control and aircraft navigation services, namely, aircraft navigation information services; flight information services; providing information to third parties regarding air travel and air traffic navigation and control by means of a global computer information network; on-line services, namely, providing information to third parties regarding air travel and air traffic navigation and control; operation of air traffic centers, terminal control units and control towers; operation of facilities for aircraft navigation and automated flight data recording and display systems
41
educational and training services relating to air navigation, aeronautics and air traffic control, namely, providing classes, courses, workshops, seminars, conferences, demonstrations, computer-based training and distribution of educational materials in connection therewith
42
operating facilities for surveillance and radar detection of aircraft; establishing and promoting operational efficiency and safety of air navigation and air traffic control, namely, reviewing standards and practices of air navigation and air traffic control to assure operational efficiency and compliance with safety laws and regulations and support services related to safe aircraft operations in the nature of technical supervision, inspection and consulting relating thereto; technical consulting and research and development services in the field of air navigation and air traffic control systems; emergency assistance relating to air traffic control, namely, providing emergency air traffic consultation, arranging for the dispatch of emergency vehicles and staff and monitoring and notifying emergency and medical facilities; aviation weather reporting and forecasting services