When conducting an approach where only RVR 'A' is available, what are the appropriate limits or restrictions?

When conducting an approach where only RVR 'A' is available, what are the appropriate limits or restrictions?

• A. 1200 RVR
• B. 1200/600 RVR
• C. MDA, DH or DA
• D. No restrictions

Answer: (A)

When you’re flying an approach and you only have one RVR reading available, you must base the approach minimums on the information you actually have. RVR data is reported for three parts of the runway—touchdown zone, mid, and rollout. If only the touchdown-zone RVR is available, there isn’t enough data to support the lower minima that would rely on the mid or rollout readings. The conservative, appropriate limit in that case is 1200 RVR (about 1,200 meters). This ensures you’re not attempting an approach with insufficient visibility data for the segments where you’d rely on the other readings. If the touchdown-zone RVR is at or above 1200 meters, you can apply the published minima that correspond to having only that reading. If it’s below 1200, the approach cannot be conducted with those restrictions. The other options don’t fit because they either require additional RVR data (like a 1200/600 split), refer to altitude-based minima (MDA, DH, DA) rather than visibility data, or imply no restrictions at all, which isn’t correct when complete RVR data isn’t available.

When you’re flying an approach and you only have one RVR reading available, you must base the approach minimums on the information you actually have. RVR data is reported for three parts of the runway—touchdown zone, mid, and rollout. If only the touchdown-zone RVR is available, there isn’t enough data to support the lower minima that would rely on the mid or rollout readings. The conservative, appropriate limit in that case is 1200 RVR (about 1,200 meters). This ensures you’re not attempting an approach with insufficient visibility data for the segments where you’d rely on the other readings.

If the touchdown-zone RVR is at or above 1200 meters, you can apply the published minima that correspond to having only that reading. If it’s below 1200, the approach cannot be conducted with those restrictions. The other options don’t fit because they either require additional RVR data (like a 1200/600 split), refer to altitude-based minima (MDA, DH, DA) rather than visibility data, or imply no restrictions at all, which isn’t correct when complete RVR data isn’t available.