Which components are included in the National Airspace System (NAS)?

• A. Airspace and airports only
• B. Aeronautical charts and weather information only
• C. The common network of United States airspace, including air navigation facilities, equipment and services, airports or landing areas; aeronautical charts, information and services; rules, regulations and procedures, technical information; and manpower and material.
• D. A weather satellite network used for flight planning

Answer: (C)

The National Airspace System is the complete, integrated network that supports safe and efficient flight in United States airspace. It isn’t just the airspace or the airports; it includes the airspace structure plus the nav facilities, the equipment and services that help aircraft navigate and communicate, and the systems that connect airports, charts, information, and services. It also covers the rules, regulations, and procedures that govern operations, plus the technical information and the personnel and resources needed to keep everything running. That’s why the best choice lists all of these components together as part of the NAS. The other options focus on only parts of the system—airspace and airports, charts and weather information, or weather data for planning—which don’t capture the full, interconnected network.