Plain English Meaning

On the runway, you can see 1,800 feet ahead. That number comes from instruments beside the runway, not from a pilot looking out the window. It is often the lowest visibility allowed for many precision instrument approaches.

Full Definition

A Runway Visual Range value of 1,800 feet, meaning the horizontal distance a pilot can see down the runway from the approach end is 1,800 feet, as measured by transmissometer equipment near the runway. This is a common minimum visibility value used on ILS approach charts, particularly for Category I ILS approaches to runways equipped with appropriate approach lighting.

Context Anchor

Seen on instrument approach charts and in for -visibility approaches, including ILS approaches.