Definition
Computer software used in Precision Runway Monitor (PRM) operations that continuously tracks the position of aircraft on closely spaced parallel approaches and alerts controllers when an aircraft deviates from its assigned final approach course toward the adjacent approach path.
Plain English
A computer program that watches aircraft on side-by-side approaches and warns controllers the moment one starts drifting toward the other.
Context Anchor
Seen in approach-control discussions about Precision Runway Monitor benefits, especially at airports using closely spaced parallel runways.
Why Pilots Care
It enables safe, simultaneous approaches to parallel runways that would otherwise be restricted, increasing airport capacity while maintaining required separation.
Intuition Check
Do not read this as general computer software used by the pilot. Here, it means monitoring software in the air traffic control system that tracks aircraft movement for approach safety.
Example Sentence 1
The PRM controller's system tracking software flagged the deviation, and a breakout was issued within seconds.
Example Sentence 2
When the system tracking software detected a developing blunder, it immediately generated an aural and visual alert for the controller.