; innovation in supersonic aircraft; ultra-efficient vehicles; transition to alternative propulsion and energy; real-time, system-wide safety assurance; and assured autonomy for aviation transformation) are effective and necessary research areas for the development of next generation aeronautics technology that will preserve the United States lead in the global aviation industry. (9) Aeronautics research is focused on fundamental capabilities that have the potential to open entirely new industries, including low-cost electric propulsion, advanced composite material manufacturing, simplified air vehicle operation, and increased vertical takeoff and landing, that will allow for safer and more efficient aviation products and support mobility and economic growth. (10) To meet the challenges of the 21st century, the United States needs to support NASA's Aeronautics Research Program at funding levels that are commensurate with it's past, present, and future contributions to the nation's economic competitiveness and national security. 4. Definitions In this Act: (1) Administrator The term Administrator means the Administrator of NASA. (2) Aeronautics Strategic Implementation Plan The term Aeronautics Strategic Implementation Plan means the Aeronautics Strategic Implementation Plan issued by the NASA Aeronautics Research Mission Directorate. (3) Air traffic management system The term air traffic management system means the procedures, technology, and human resources to guide aircraft through the sky and on the ground and to manage low- and high-altitude airspace use. (4) NASA The term NASA means the National Aeronautics and Space Administration. (5) Unmanned aircraft system