Autopilot prohibits operation below how many feet AGL?

• A. 600 ft AGL
• B. 400 ft AGL
• C. 80 ft AGL
• D. 1000 ft AGL

Answer: (A)

The main idea is that autopilot systems have a safety boundary for when they can be relied on during the approach and landing phases. Below a certain height, there isn’t enough time or margin to detect a fault, disengage, and manually fly a safe go-around or landing if something goes wrong. That’s why there’s a minimum altitude for autopilot operation.

The correct limit is six hundred feet above the ground. This gives pilots a comfortable buffer to take manual control, verify the approach visually or with instruments, and execute a safe transition to landing if needed. Other values would either provide too little margin or exceed the practical safety boundary, so they aren’t the defined minimum.