Which statement is true about RVR reports?

The statement about RVR (Runway Visual Range) reports being true indicates that when the prevailing visibility is 1 statute mile or less, RVR is then reported in the METAR (Meteorological Aerodrome Report) or SPECI (Special Weather Report). This is crucial because RVR is particularly important for aircraft operations, especially during low visibility situations. It provides pilots and air traffic controllers with critical information regarding how far ahead a pilot can see along the runway, which directly impacts landing and takeoff decisions.

In conditions of reduced visibility, standard visibility measures may not accurately reflect the conditions experienced by pilots on final approach or just after takeoff. Hence, the emphasis on RVR under lower visibility conditions is vital for safety. This reporting would typically follow strict criteria that state that if prevailing visibility decreases to the specified limit, RVR becomes the primary metric included in aviation weather reports.

This understanding of RVR further underscores its importance in ensuring safe aviation operations amidst varying weather conditions.