Definition
An automated air traffic control function that continuously compares an aircraft's actual flight progress against its cleared route, altitude, and speed, and alerts the controller when the aircraft deviates beyond defined tolerances.
Plain English
A computer system that watches each aircraft to make sure it is doing what the controller told it to do, and warns the controller if it isn't.
Context Anchor
Seen in air traffic control automation, radar monitoring, and discussions of whether an aircraft is following its assigned path.
Derivation
Conformance comes from the Latin 'conformare,' meaning 'to shape together' or 'to match.' Monitoring means 'watching over.' Together: watching to see whether the aircraft's flight matches the plan it was cleared for.
Why Pilots Care
Detects navigation errors early so controllers or pilots can correct them before safety is affected.
Intuition Check
Conformance Monitoring does not mean a person is casually watching the airplane. Here, it means an automated check that compares the aircraft’s actual flight with its expected or assigned flight path.
Example Sentence 1
The controller's display flagged the aircraft after conformance monitoring detected a 400-foot deviation from the assigned altitude.
Example Sentence 2
ADS-B conformance monitoring confirmed the flight remained within the required vertical limits during the arrival.