What is the role of ADS verification in autopilot operation?

• A. ADS verification has no impact on autopilot functionality.
• B. Autopilot uses only GPS data for flight path guidance.
• C. Autopilot guidance is independent of ADS data.
• D. Autopilot uses ADS data to determine flight path; verification ensures the data is correct.

Answer: (D)

Air data accuracy drives autopilot guidance. The Air Data System provides essential measurements—airspeed, altitude, vertical speed, and related parameters—that the flight control computers use, along with navigation data, to compute and command the flight path. ADS verification checks that this data is valid and consistent across sources. When the data pass verification, the autopilot can confidently determine and follow the intended path. If the ADS data are faulty or inconsistent, verification flags the issue and the system won’t rely on that data, often degrading to safer modes or prompting crew intervention. GPS alone can’t define the full flight path, so the autopilot depends on correct ADS data to determine the route and trajectory.