Runway visibility value (RVV)

RVV is the measured visibility at a specific runway, calculated by a transmissometer. This device measures the amount of light that passes through the atmosphere and provides an accurate reading of how far objects can be seen. Pilots rely on RVV to determine if the runway is clear enough to execute a safe landing or takeoff. The RVV value is reported in feet or meters, and the minimum value required for aircraft to operate varies depending on the type of aircraft, flight rules, and current weather conditions. RVV is an essential parameter in aviation safety, and it helps pilots and air traffic controllers to make informed decisions about aircraft operations.