NATS, formerly known as National Air Traffic Services Ltd., is the country's principal air navigation service with 23 en-route radar sites.
Under the award, Raytheon UK provide technical assistance, radar repair, materials for maintenance and manage obsolescence issues.
"NATS' en-route radar sites are integral to U.K. air traffic control, providing data used for the control of the majority of aircraft movements in U.K. airspace," said Richard Daniel, Raytheon UK managing director for the Defense and Air Traffic business. "This contract will run until 2028 and will see Raytheon continue to support NATS over the full lifetime of these systems.
"Winning this contract demonstrates the capability of the Radar Site Services project team in delivering two previous support contracts, and enhances the company's relationship with NATS."
Added David Hawken, NATS general manager for engineering service delivery: "Raytheon has worked with us for the past eight years managing the maintenance of our radar sites across the UK and, based on performance, was a logical choice to continue that support over the next 15 years."
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