Northrop Grumman to provide spare parts for surface warship electronic warfare (EW) in missile defense

Oct. 17, 2022
SEWIP is upgrading the existing AN/SLQ-32(V) surface warship EW system and provide improved anti-ship missile defense and situational awareness.

WASHINGTON – U.S. Navy surface warfare experts are ordering spare parts for an advanced electronic warfare (EW) systems aboard guided missile destroyers, aircraft carriers, and amphibious assault ships under terms of a $31.8 million order announced last month.

Officials of the Naval Sea Systems Command in Washington are asking engineers at the Northrop Grumman Corp. Mission Systems segment in Linthicum Heights, Md., for provisioned item order spare parts in support of the Surface Electronic Warfare Improvement Program (SEWIP) Block 3 full-rate production.

SEWIP is an evolutionary acquisition program to upgrade the existing AN/SLQ-32(V) surface warship EW system and provide improved anti-ship missile defense and situational awareness.

Northrop Grumman won $267 million Navy contract in 2015 to develop and build SEWIP Block 3 to make further upgrades to the AN/SLQ-32 with new technologies for early detection, signal analysis, threat warning, and protection from anti-ship missiles. There are three established SEWIP block upgrades and a fourth is planned.

Related: Navy asks L3Harris to provide missile-defense electronic warfare (EW) payloads to protect surface warships

The SEWIP Block 3 uses active electronically scanned array (AESA) antennas based on gallium nitride (GaN) transmit and receive modules. The system not only jams enemy targeting radars and missile guidance systems, but also has a Soft Kill Coordinator (SKC) to manage electronic-attack engagements.

Soft kill refers to altering the electromagnetic signature of friendly ships and other targets to confuse or interfere with enemy radar targeting systems.

The Lockheed Martin Rotary and Mission Systems segment in Liverpool, N.Y., is building the SEWIP Block 2 surface warfare EW system, which provides improved electronic support receivers and combat system interface and expands the receiver and antenna group to help surface electronic warfare capabilities keep pace with growing threats.

Since the SEWIP missile-defense program started in 2002, General Dynamics Advanced Information Systems (AIS) in Fairfax, Va., acted as prime contractor for SEWIP blocks 1A, 1B1, 1B2, and 1B3.

Related: DRS Laurel to build missile-defense radar systems to protect Navy surface warships from anti-ship missiles

Developed by Raytheon in the 1970s, the original AN/SLQ-32 systems employed passive radar technology for early warning, identification and tracking of enemy threats. Subsequent upgrades provided an additional active capability for simultaneous jamming of several different threats.

On this contract Northrop Grumman will do the work in Baltimore, Sykesville, and Windsor Mill, Md.; Andover and Chelmsford, Mass; Tampa, Fla.; Newport Beach, Chatsworth, Redondo Beach, and San Diego Calif.; Littleton, Colo.; and Chandler, Ariz., and should be finished by September 2025.

For more information contact Northrop Grumman Mission Systems online at, or Naval Sea Systems Command at

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