When is the Runway Visual Range (RVR) reported?

The correct answer is that Runway Visual Range (RVR) is reported when it falls below 1500 meters. RVR is a critical measurement used in aviation that indicates the horizontal distance a pilot can see down the runway. It becomes especially important during periods of reduced visibility, such as fog or heavy precipitation.

In aviation, RVR is typically reported when visibility conditions deteriorate to levels that could affect safe aircraft operations. The threshold of 1500 meters is established to ensure that pilots have accurate information regarding operational conditions, especially during takeoff and landing phases. Below this distance, the risk of performance impairment for pilots increases, thus necessitating such reports to ensure safety in operations.

This standard is integral to the operational protocols of airports and air traffic control, which aim to maximize safety and inform pilots regarding runway conditions. By communicating RVR when visibility is critically reduced, pilots can make informed decisions about whether to proceed with approaches or adjust their operations accordingly.