What does RVR stand for in aviation terminology?

RVR stands for Runway Visual Range, which is a critical measurement in aviation that indicates the distance a pilot can see down the runway. This value is particularly important during low-visibility conditions, such as fog, rain, or snow, as it helps pilots and air traffic controllers assess whether the runway conditions are safe for landings and takeoffs.

The concept of RVR assists in decision-making related to flight operations, ensuring that pilots understand their visual limitations relative to the runway. It is generally determined by ground-based instruments that measure the horizontal range of visibility in relation to the runway lights.

The other options presented do not reflect accepted aviation terminology. For instance, Runway Velocity Range and Runway Vertical Readout do not pertain to standard measurements or concepts used in aviation. Runway Visibility Range is also misleading, as it conflates two different terms and does not accurately represent the standardized term used in aviation. Understanding RVR is crucial for both pilots and air traffic controllers as it directly impacts operational safety in various weather conditions.