The minimum distance threshold for PRM runway separation is less than how many feet?

The minimum distance threshold for PRM runway separation is less than how many feet?

• A. 4,000 feet
• B. 4,500 feet
• C. 4,300 feet
• D. 4,600 feet

Answer: (C)

PRM stands for Precision Runway Monitor, a system that gives controllers enhanced surveillance of aircraft on parallel final approaches. When two runways are closely spaced, you can’t rely on standard separation alone to keep arrivals safe, so PRM-enabled monitoring helps maintain the necessary separation margins for simultaneous approaches. The threshold used for deciding when PRM procedures come into play is about 4,300 feet. If the runways are closer than 4,300 feet, PRM procedures are applied to maintain safe separation; if they’re farther apart, standard separation suffices. So, the minimum distance threshold is less than 4,300 feet.

PRM stands for Precision Runway Monitor, a system that gives controllers enhanced surveillance of aircraft on parallel final approaches. When two runways are closely spaced, you can’t rely on standard separation alone to keep arrivals safe, so PRM-enabled monitoring helps maintain the necessary separation margins for simultaneous approaches. The threshold used for deciding when PRM procedures come into play is about 4,300 feet. If the runways are closer than 4,300 feet, PRM procedures are applied to maintain safe separation; if they’re farther apart, standard separation suffices. So, the minimum distance threshold is less than 4,300 feet.