Enterprise Air Surveillance Radar (EASR)

- , June 1, 2018

Quick Facts

Role and Mobility Ship Self-Defense, Situational Awareness, Air Traffic Control; Ship-mobile
Frequency N/A
Range N/A
Air Defense Interceptor Systems N/A
Targets Anti-Ship Cruise Missiles, Drones, Fixed-Wing Aircraft, and Helicopters
Status/Exports In production; None
Producer Raytheon Systems


The Enterprise Air Surveillance Radar or EASR is the US Navy’s next generation radar for aircraft carriers and amphibious warfare ships. It will provide simultaneous anti-air and anti-surface warfare, electronic protection, and air traffic control capabilities.[i] EASR is built on Radar Modular Assembly (RMA) technology. Each RMA is a self-contained radar in a ‘2x2x2’ box that can integrate with each other to create radar arrays of various sizes depending on current needs.[ii]

Two variants of EASR will be provided:

Variant 1 – a single face, rotating radar

  • Upgraded capability replacing AN/SPS-48 and -49 air search radars
  • Primary sensor for ship self-defense and situational awareness
  • Designated radar for LHA-8 and LX(R)

Variant 2 – Three face, fixed array radar

  • Upgraded capability replacing AN/Spy-4 Volume Search Radar
  • Primary sensor for ship self-defense, situational awareness and air traffic control
  • Designated radar for CVN 78 Ford-class carriers, starting with CVN 79[iii]

EASR is meant to be the replacement for the Volume Search Radar for the CVN 78 class and the AN/SPS-48 and AN/SPS-49 radar systems for numerous other ship classes.[iv]

Strategic Implications

Strategically, EASR is a valuable radar because it is 20% smaller than the radars it is replacing, but just as capable and sensitive to incoming threats. Its smaller size frees up space on a ship or aircraft carrier for other necessities.[v] Beyond that, EASR is capable of operating in high clutter, near-land, and in electromagnetic interference environments. These capabilities make it a valuable radar in areas with a high chance of interference. Its built-in cyber resiliency also offers protection against the possibility of cyber-attacks during operations.


August 2017: EASR underwent its Critical Design Review.

June 2017: EASR is slated to go on the now-under-construction USS Kennedy (CVN 79).[vi]

March 2017: EASR successfully conducted its Preliminary Design Review.

August 2016: Raytheon is awarded a contract for the US Navy’s Enterprise Air Surveillance Radar.[vii]

Recent News


    [i] https://www.raytheon.com/capabilities/products/easr

    [ii] http://mil-embedded.com/news/enterprise-air-surveillance-radar-completes-preliminary-design-review/

    [iii] https://www.raytheon.com/capabilities/products/easr

    [iv] http://mil-embedded.com/news/enterprise-air-surveillance-radar-completes-preliminary-design-review/

    [v] https://www.raytheon.com/capabilities/products/easr

    [vi] http://nationalinterest.org/blog/the-buzz/the-us-navy-has-new-way-protect-its-aircraft-carriers-enemy-21267

    [vii] http://investor.raytheon.com/phoenix.zhtml?c=84193&p=irol-newsArticle&ID=2196484