Which statement best describes ADS-B?

Which statement best describes ADS-B?

• A. ADS-B broadcasts position and velocity from on-board sensors; enhances surveillance accuracy, reduces infrastructure needs, and improves situational awareness
• B. ADS-B relies on satellite weather data
• C. ADS-B can operate without on-board sensors
• D. ADS-B data is used solely for pilot communications

Answer: (C)

ADS-B sends out an aircraft’s own position and velocity that are calculated using onboard navigation sensors, such as GPS and inertial systems. Because it depends on those sensors to determine where the aircraft is and how fast it’s moving, the broadcast is accurate for surveillance and tracking. This information is received by air traffic controllers and other equipped aircraft, helping to improve situational awareness and reduce reliance on radar infrastructure. It isn’t driven by satellite weather data, and it isn’t produced without onboard sensors—the position and velocity must come from the aircraft’s own navigation equipment. ADS-B data is used for surveillance, not solely for pilot communications. The best description is the one that highlights broadcasting position and velocity derived from on‑board sensors and the resulting improvements to surveillance and awareness.

ADS-B sends out an aircraft’s own position and velocity that are calculated using onboard navigation sensors, such as GPS and inertial systems. Because it depends on those sensors to determine where the aircraft is and how fast it’s moving, the broadcast is accurate for surveillance and tracking. This information is received by air traffic controllers and other equipped aircraft, helping to improve situational awareness and reduce reliance on radar infrastructure. It isn’t driven by satellite weather data, and it isn’t produced without onboard sensors—the position and velocity must come from the aircraft’s own navigation equipment. ADS-B data is used for surveillance, not solely for pilot communications. The best description is the one that highlights broadcasting position and velocity derived from on‑board sensors and the resulting improvements to surveillance and awareness.