The Federal Aviation Administration has contracted with RTX and Indra to update the country’s antiquated air traffic control system.

The two contractors will replace the national network of radar systems to bring the aircraft-detecting system into the modern era. RTX, based in Arlington, Virginia, and Indra, based in Madrid, have agreed to replace up to 612 radars by June 2028. Most of the current radars date back to the 1980s.