What is the minimum use height for autopilot during a visual approach?

The minimum use height for autopilot during a visual approach is 400 feet Above Ground Level (AGL). This limitation ensures that the autopilot is only utilized when there is sufficient altitude for the pilot to maintain control of the aircraft manually if needed. Operating above this altitude allows for better situational awareness and continued control, which is especially important during critical phases of flight like the approach.

Being above 400 feet AGL provides a margin of safety, reducing the potential for issues that could arise from weather or visibility changes that may occur at lower altitudes. Using autopilot below this altitude could inhibit the pilot's ability to effectively react to any sudden changes in the environment, especially when transitioning from a stabilized approach to landing where visual references can be crucial.

In contrast, the other options listed—25 ft, 50 ft, and 200 ft AGL—are significantly below the established minimum and do not align with the operational safety protocols necessary for visual approaches. These lower altitudes could result in increased risk during landing phases where manual control is often essential.