Under precision runway monitoring, the permissible separation between parallel runways is within which range?

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Multiple Choice

Under precision runway monitoring, the permissible separation between parallel runways is within which range?

Explanation:
PRM relies on radar to simultaneously monitor aircraft on two closely spaced parallel approaches. To let the radar and ATC separation standards work effectively, the centerline distance between the runways must fall within a specific window. That window is from 3,000 feet to 4,600 feet. If the runways are closer than 3,000 feet, radar discrimination becomes unreliable; if they are farther than 4,600 feet, the runways aren’t considered closely spaced for PRM operations. So the permissible separation is 3,000 to 4,600 feet.

PRM relies on radar to simultaneously monitor aircraft on two closely spaced parallel approaches. To let the radar and ATC separation standards work effectively, the centerline distance between the runways must fall within a specific window. That window is from 3,000 feet to 4,600 feet. If the runways are closer than 3,000 feet, radar discrimination becomes unreliable; if they are farther than 4,600 feet, the runways aren’t considered closely spaced for PRM operations. So the permissible separation is 3,000 to 4,600 feet.

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