Plain English Meaning

The pilot will be able to see about 1,800 feet ahead down the runway when landing. That is roughly a third of a mile of forward visibility along the runway surface.

Full Definition

A Runway Visual Range value of 1,800 feet, meaning the horizontal distance a pilot can be expected to see down the runway from the approach end is 1,800 feet, as measured by transmissometer equipment located alongside the runway. This specific value is the standard minimum visibility required for a Category II ILS approach.

Context Anchor

Seen on instrument approach minimums and ILS approach category information, where the required visibility may be given as RVR instead of ordinary miles.