Which type of radar system is used for military precision approaches?

The correct answer is the Precision Approach Radar (PAR) system, which is specifically designed for military precision approaches. This radar system provides highly accurate information to pilots during the final approach phase of landing. It enables air traffic controllers to give precise guidance regarding the aircraft's position, altitude, and course, ensuring safe and accurate landings in a variety of weather conditions.

PAR operates in real-time using radar signals to determine the aircraft’s distance and speed while providing vertical and horizontal guidance. This makes it particularly valuable in situations where visibility is low or during adverse weather, as it enhances situational awareness for the pilot.

In contrast, the Airport Surveillance Radar (ASR) primarily provides information about aircraft location but does not offer the same level of precision for approach guidance as PAR. VOR (VHF Omnidirectional Range) and DME (Distance Measuring Equipment) are navigational aids that assist with enroute navigation and distance measurement, respectively, but they lack the precision approach capabilities found in PAR.