What is rvr?

RVR (Runway Visual Range) is a measure of the distance that a pilot can see along the runway in low visibility conditions. It is measured in meters or feet using transmissometers or forward scatter meters. The RVR is typically used to determine the minimum visibility requirements for aircraft to take off or land safely.

RVR is affected by various environmental factors, such as fog, mist, rain, snow, and smoke, which can impair visibility. It is also impacted by the lighting conditions around the runway, such as the presence of runway lights, ambient light, and the angle of sunlight.

There are different categories of RVR that help pilots determine the visibility and conditions required for landing and departing aircraft. These categories range from a minimum of 50 meters for Category IIIb conditions to 1,500 meters for Category I conditions.

The aviation industry uses RVR as an essential safety tool in low-visibility conditions. It enables pilots and ground staff to make informed decisions about aircraft movements and helps to ensure the safety of passengers and crew.