Runway Visual Range
In the context of aerospace engineering, Runway Visual Range (RVR) is a crucial term that refers to the distance over which a pilot of an aircraft on the centerline of the runway can see the runway surface markings or the lights delineating the runway or identifying its centerline. RVR is typically measured in feet or meters and is used primarily in aviation weather forecasting and decision-making during takeoff and landing. It is a critical factor in determining the minimum visibility required for an aircraft to land or take off under various weather conditions. The measurement of RVR is typically done using transmissometers installed at various points along the runway. These devices measure the attenuation of light beams to determine the visibility. The RVR value is then used in conjunction with the aircraft's approach category and the type of approach being used to determine if a landing or takeoff can be safely conducted.
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