Which runway equipment must be operative for 600/600/600 minimums?

• A. Centerline lights (CL) and High-Intensity Runway Lights (HIRL)
• B. PAPI and ILS
• C. Taxi lights only
• D. REIL and TDZ lights

Answer: (A)

For these low-visibility minimums, the runway environment must be clearly defined, and that depends on having certain lighting working. The required setup is centerline lighting along the runway and the high-intensity runway lights. Centerline lights help you follow the exact center of the runway when visibility is limited, reducing the chance of drifting off the centerline. High-intensity runway lights provide bright, reliable cues of the runway edges and its threshold, which is crucial for depth perception and judgment during the final approach and rollout.

PAPI and ILS relate to glide path and navigation guidance, not the basic runway lighting required to publish that minimum. Taxi lights are only for ground movement and don’t impact the ability to meet these minimums. While REIL and TDZ lights assist with runway identification and the touchdown zone, they are not the specific combination required to support these particular minimums.