Is RVR or visibility controlled?

If RVR (which is both runway-specific and more precise) is available, then it is controlling. If not then visibility (single value for the airfield) is controlling. For example, typical Cat I minimums might be 1800 RVR or 1/2 Statute Mile (when the runway has an ALSF-II approach lighting system).

What is RVR visibility?

In aviation, the runway visual range (RVR) is the distance over which a pilot of an aircraft on the centreline of the runway can see the runway surface markings delineating the runway or identifying its centre line. RVR is normally expressed in meters or feet.

What is visibility in aviation?

Description. Visibility is a measure of the distance at which an object or light can be clearly discerned. Visibility may vary according to the direction and angle of view, and the height of the observer. Visibility is affected by the presence of fog, cloud, haze and precipitation.

What is RVR approach?

The RVR (Runway Visual Range) is required to support precision landing and takeoff operations in the NAS . The system measures visibility, background luminance, and runway light intensity to determine the distance a pilot should be able to see down the runway.

What if RVR is less than visibility?

“Greater”, “Less Than” and Variable Visibility If visibility is less than the lowest reportable RVR value, an “M” is placed in front of it.

Which RVR is controlling for landing?

touchdown zone RVR
The touchdown zone RVR shall always be controlling. If reported and relevant, the midpoint and stop end RVR shall also be controlling.

What does RVR 5 5 mean?

5,5,5 stands for RVR 500 feet on the touchdown, midpoint and rollout sensors.

What does RVR 5 mean?

take-off minimum
RVR 5 is now the lowest authorized take-off minimum based upon outside visual references. • High intensity runway lighting (HIRL) is required for take-off operations less than RVR 10. The following requirements and restrictions apply to the use of RVR values below RVR 16: a.

Is 9 miles visibility good?

8=Visibility very good, objects not visible at 30 miles (nautical). 9=Visibility excellent, objects visible more than 30 miles (nautical). Science!