What approach type utilizes ASR technology?

Non-precision approaches utilize ASR (Airport Surveillance Radar) technology. ASR provides air traffic controllers with radar coverage to determine the aircraft's position in relation to the runway, but it does not provide the same level of precision as an instrument landing system (ILS).

In a non-precision approach, pilots rely on navigational aids such as VORs (VHF Omnidirectional Range) or NDBs (Non-Directional Beacons) for guidance rather than specific vertical guidance, as would be available in a precision approach. The use of ASR allows controllers to guide the pilot to the airport using radar, helping to enhance situational awareness and provide assistance in poor visibility conditions.

This method is particularly valuable when weather conditions do not allow for visual approaches, giving pilots a means to land using instrumentation, although it comes with the limitation that it is not as precise as precision approaches that utilize specific approach procedures and equipment.