What does the term "runway visual range" (RVR) refer to?

Runway Visual Range (RVR) is a specific measurement that indicates the distance a pilot can see down the runway, particularly important during low visibility conditions. It is reported when visibility is less than 1500 meters and reflects how far a pilot can see and safely navigate during approach and landing.

Measuring RVR takes into account various factors, including the light conditions and any obstructions that may affect visibility. It is crucial for pilots to be aware of RVR to ensure a safe landing, particularly in instances of fog, rain, or snow, where regular visibility may not provide a clear view of the runway.

The focus on RVR being reported when visibility drops below 1500 meters highlights its purpose as a safety measure, ensuring that pilots have an accurate understanding of what they can expect as they approach landing. This understanding is vital for making informed decisions about landing and is part of the broader context of airport operations and management of runway safety.