What is the minimum reported Runway Visual Range (RVR) in METAR?

The minimum reported Runway Visual Range (RVR) in a METAR report is indeed 300 feet. RVR is a critical measurement that reflects how far a pilot can see down the runway under certain atmospheric conditions, specifically during takeoff and landing phases. It is measured in feet and is typically reported in conjunction with visibility conditions, particularly in low visibility situations like fog or heavy rain.

RVR readings can indicate conditions that significantly impact flight safety, and the threshold of 300 feet represents a critical limit below which many operational restrictions may apply for aircraft during landing and takeoff. This value allows pilots and air traffic controllers to make informed decisions related to airport operations, such as whether to proceed with approaches or landings.

The other numerical values in the options represent distances that are not recognized as minimums for RVR reporting. The choice of 300 feet is derived from established aviation guidelines that prioritize safety and operational efficiency in reduced visibility scenarios. Understanding the implications of RVR is essential for pilots navigating complex weather conditions, as it dictates various regulations and operational limits.