Advanced radar system is used to detect aircraft in U.S. airspace.

The U.S. Air Force uses the Air Route Surveillance Radar to monitor and control the air space within and around America.

Search Radar
The U.S. Air Force works closely with the Federal Aviation Administration (FAA) on the Air Route Surveillance Radar. The current version of this long-range radar system is the "ARSR-4," which is a search radar that has a range of 200 nautical miles. The radar system is used to detect aircraft that are entering or leaving American domestic airspace – including over U.S. coastal waters.

The Air Route Surveillance Radar is able to identify aircraft that are attempting to evade detection by flying at low altitudes, it can function in extreme weather conditions and storms, and it contains software that reduces the amount of clutter on the radar system – enabling the U.S. Air Force to effectively monitor U.S. airspace at all times. The system also displays three dimensional images (3D).

Oklahoma City to Guam
The Air Route Surveillance Radar system is installed at the Guantanamo Bay Naval Base in Cuba, the municipality of Yigo in Guam, and the Mike Monroney Aeronautical Center in Oklahoma City. Most of these sites are not manned by personnel. Instead, they are remotely monitored for both radar data and the status of the radars operational function. The radar system was first introduced and used in 1958 and has been a continual presence – monitoring American airspace – ever since.