Which ground components are required to be operative for a Category II approach?

For a Category II approach, the critical ground components that must be operative include the high-intensity runway lights (HIRL), touchdown zone lights (TDZL), runway centerline lights (RCLS), and runway visual range (RVR) reporting systems. These components are specifically designed to enhance visibility and provide the necessary guidance for pilots when operating in low visibility conditions, which is a hallmark of Category II approaches.

The HIRL provides increased visibility of the runway, while the TDZL assists in identifying the touchdown zone, which is crucial for landing accuracy. The RCLS offers alignment guidance along the center of the runway, and RVR is essential for ensuring the distance a pilot can see, contributing to safe operations during reduced visibility.

While the other options list important components, they include items that are not mandatory for the execution of a Category II approach. For example, marker beacons and weather radar are not required for this specific category. Therefore, the focus on the essential components specified in the correct answer underscores the primary safety features that facilitate a successful and safe landing in challenging conditions.