Plain English Meaning

A measurement of how far a pilot can see down the runway, taken from a sensor placed roughly halfway along it. It tells the pilot what visibility is like in the middle portion of the runway, not just at the start or end.

Full Definition

An RVR readout taken from a visibility sensor located near the midpoint of the runway, reported in feet, used in addition to Touchdown and Rollout RVR values on runways equipped with multiple sensors.

Context Anchor

Seen in low-visibility takeoff, approach, and landing information when runway visibility is reported by runway section.

Derivation

RVR stands for — a measured horizontal distance a pilot can expect to see down the runway. 'Mid' simply identifies which sensor along the runway provided the reading.