Answer :
Final answer:
Precision Runway Monitoring (PRM) is b) a radar system used to monitor approaches to closely spaced parallel runways. It provides real-time data on the position and trajectory of multiple aircraft for air traffic controllers.
Explanation:
PRM stands for Precision Runway Monitoring, which is a radar system designed for monitoring approaches to closely spaced parallel runways. It is primarily used to ensure the safety and efficiency of aircraft approaching these types of runways. PRM provides real-time data on the position and trajectory of multiple aircraft at a high update rate, allowing air traffic controllers to closely monitor their movements and make necessary adjustments to maintain separation between aircraft.
Learn more about Precision Runway Monitoring here:
https://brainly.com/question/36278220
#SPJ11