Which of the following is not a component of CAT II required ground equipment?

The correct answer points out that the Autopilot System is not a component of CAT II required ground equipment. CAT II, or Category II, refers to a specific set of standards for instrument landing systems that enable aircraft to land in lower visibility conditions.

For CAT II operations, the required ground equipment includes components that directly aid in the precision and safety of the landing approach. These components, such as the Inner Marker, Touchdown Zone Lights, and High Intensity Runway Lights, are integral to ensuring that aircraft can safely navigate and land on the runway under reduced visibility.

The Inner Marker provides critical information to the pilot when approaching the runway, indicating that they are on the correct glide path. Touchdown Zone Lights help pilots identify the start of the runway during landing, especially in low visibility situations. High Intensity Runway Lights enhance runway visibility, making them essential for safe landings.

In contrast, the Autopilot System, while beneficial for flight control and navigation, is not a specified component of the ground equipment necessary for CAT II operations. It is primarily an aircraft system that assists in controlling the aircraft's flight path and does not fall under the essential ground equipment necessary for the specific precision required in Category II landings.