When conducting an approach where both RVR 'A' and 'B' are available, what are the appropriate limits or restrictions?

When conducting an approach where both RVR 'A' and 'B' are available, what are the appropriate limits or restrictions?

• A. 1200 RVR
• B. No restrictions
• C. 1200/600 RVR
• D. 1200/600 RVR, 200' DA

Answer: (C)

When two RVR sources are available, the published minima for the approach are two values that cover different portions of the runway: the touchdown zone and the mid portion. The combination 1200/600 RVR means you must have at least 1200 meters of visibility at the touchdown zone and at least 600 meters along the mid portion. Both conditions must be met to continue the approach, which is why this two-number limit is used when both sensors are reporting. This avoids relying on a single number and provides adequate visibility both at touchdown and as you progress down the runway. The option that adds a decision altitude (200' DA) isn’t part of these RVR-based limits, and claiming no restrictions ignores the defined minima.

When two RVR sources are available, the published minima for the approach are two values that cover different portions of the runway: the touchdown zone and the mid portion. The combination 1200/600 RVR means you must have at least 1200 meters of visibility at the touchdown zone and at least 600 meters along the mid portion. Both conditions must be met to continue the approach, which is why this two-number limit is used when both sensors are reporting. This avoids relying on a single number and provides adequate visibility both at touchdown and as you progress down the runway. The option that adds a decision altitude (200' DA) isn’t part of these RVR-based limits, and claiming no restrictions ignores the defined minima.