What is the minimum altitude to engage autopilot on a non-precision approach?

• A. 400 feet
• B. 200 feet
• C. 1000 feet
• D. 0 feet

Answer: (A)

On a non-precision approach you have lateral guidance but no vertical guidance, so the autopilot is used to track the final approach course while you manage the descent to the MDA. The minimum altitude to engage the autopilot in this situation is 400 feet above the airport elevation (AGL). This provides a safe margin to verify the approach setup, configure the airplane (flaps, gear as required), and establish a stable course before descending further. It also leaves time to execute a go-around if the approach becomes unstable. Engaging earlier wouldn’t add real benefit, and engaging lower than 400 feet leaves too little time to respond to any issues. Higher altitudes merely delay automation without added value in this context, so 400 feet AGL is the correct minimum.