What is the minimum altitude at which the autopilot may remain engaged during Category 1 precision approach operations?

The minimum altitude at which the autopilot may remain engaged during Category 1 precision approach operations is 80 feet AGL (Above Ground Level). This altitude is critical because it ensures that the aircraft is within a safe operational envelope for automatic landings. At this point, the autopilot can effectively manage the descent while maintaining the precision necessary for a stable approach and landing, which is particularly important in conditions of reduced visibility.

Operating at or below this altitude without adequate pilot monitoring could lead to an increased risk of uncontrolled descent or other situational awareness challenges. The standard emphasizes the importance of maintaining control and ensuring that the aircraft is in a position to respond appropriately to any potential issues that could arise close to the ground. Therefore, the 80 ft AGL threshold is established as a balance between automation benefits and the need for pilot oversight during critical phases of the flight.