Plain English Meaning

Sharper, faster radar screens that controllers use when watching planes fly side-by-side approaches to closely spaced runways. The screens update quickly and sound an alert if a plane drifts off its approach path toward the next runway.

Full Definition

Specialized radar display screens used by air traffic controllers during Precision Runway Monitor (PRM) operations, featuring fast update rates, fine target resolution, and automated alerting that warns controllers when an aircraft deviates toward the no transgression zone between closely spaced parallel approach paths.

Context Anchor

Seen in discussions of PRM operations, where controllers use displays to watch aircraft on closely spaced .