For precision approaches (PAR/ILS), what is the minimum height for autopilot use?

• A. 80 ft AGL
• B. 400 ft AGL
• C. 600 ft AGL
• D. 120 ft AGL

Answer: (A)

In precision approaches, you rely on precise lateral and vertical guidance from the approach system, whether it's ILS or PAR. The autopilot can steer the aircraft along the localizer and glide slope down toward the runway, but you should disconnect and hand-fly as you get very close to the ground. The standard limit for continuing to use autopilot is 80 feet above the ground. Keeping autopilot engaged down to about 80 ft AGL gives you time and altitude to ensure the flight path is stable while still allowing a safe, manual landing from that point onward. That’s why 80 ft AGL is the correct minimum height for autopilot use on precision approaches.