Which lights are required for CAT II ILS operations?

• A. CL, TDZ, HIRL
• B. CL, TDZ
• C. TDZ, HIRL
• D. CL, HIRL

Answer: (A)

In CAT II ILS operations, you need lighting that helps you see and align with the runway in low visibility. The touchdown zone lights give a clear cue of where the landing should occur, the runway centerline lights provide a continuous visual guide to stay on the centerline during the approach and flare, and the high-intensity runway lights ensure the runway is bright enough to discern the surface and surrounding cues under instrument conditions. All three together meet the minimum lighting support required for CAT II approaches. If any one of these is missing, you lose essential guidance or visibility cues, which is why the full set of CL, TDZ, and HIRL is required.