Air Traffic Control services are not provided to model aircraft operating in the NAS ______________.

• A. at or below 400' AGL
• B. above 10,000 feet
• C. in Class B only
• D. within controlled airspace

Answer: (A)

Air Traffic Control services aren’t provided to model aircraft when they’re operating in the National Airspace System at or below 400 feet above the surface. This low altitude keeps hobby flights out of the busier, higher-altitude airspace where manned aircraft and ATC flow management are common, reducing potential conflicts. If you fly above 400 feet AGL or enter controlled airspace, you must follow the applicable airspace rules and may need coordination with ATC or comply with restrictions. The other options don’t specify this altitude boundary and don’t capture why ATC services aren’t provided at that low level.