U.S. Navy Orders New SEWIP Block 3 Electronic-Warfare Systems to Jam Anti-Ship Missile Threats.

The U.S. Navy expanded SEWIP Block 3 production with Northrop Grumman, adding up to nine new electronic attack systems and the first carrier-bound unit.

The March 30, 2026, contract modification accelerates procurement of the AN/SLQ-32(V)7 SEWIP Block 3, the Navy’s primary shipborne electronic attack upgrade. It follows a $334.4 million award in December 2025, with options pushing cumulative value near $783 million, signaling sustained production momentum. The inclusion of a carrier installation marks a shift beyond destroyers, extending electromagnetic defense across high-value naval formations and aligning with Distributed Maritime Operations requirements.

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Northrop Grumman’s AN/SLQ-32(V)7 SEWIP Block 3 gives U.S. Navy warships a powerful electronic attack capability to jam and disrupt incoming anti-ship missile threats, strengthening fleet survivability in contested waters (Picture source: Northrop Grumman).

This latest action follows a Dec. 17, 2025, Navy contract modification worth $334.4 million for SEWIP Block 3 Hemisphere and Quadrant systems, with options that could raise that action’s cumulative value to about $783 million, showing that Block 3 has moved decisively into sustained fleet procurement. Strategically, that matters because the Navy is buying a reusable “soft-kill” layer that can break enemy targeting chains and defeat missile attacks without expending scarce vertical-launch interceptors.

Technically, SEWIP Block 3 is not a stand-alone replacement for the AN/SLQ-32 family but the electronic-attack increment that turns the AN/SLQ-32(V)6 baseline into the AN/SLQ-32(V)7 configuration. NAVSEA describes the architecture as a conjunctive installation that combines earlier SEWIP upgrades, Block 1B2 specific emitter identification, Block 1B3 high-gain/high-sense, and Block 2 electronic support, with Block 3 electronic attack, allowing the ship to move from passive detection and classification to active electromagnetic engagement. In practical terms, the “armament” here is electromagnetic rather than kinetic: the ship fights with precision jamming, deception, and emitter management instead of another missile round.

That matters because Block 3 adds the hardware that gives the suite real offensive-defensive punch in the RF spectrum. According to Navy and industry reporting, the system integrates upgraded electronic-attack transmitters and receivers, active electronically scanned arrays, waveform generation, and advanced jamming techniques with the existing surveillance architecture; other reporting on the program identifies gallium-nitride transmit/receive modules and a soft-kill coordinator to manage electronic-attack engagements. Northrop has long framed the design as “software defined, hardware enabled,” an open-architecture approach meant to speed technique refresh, subsystem upgrades, and integration with the wider combat system as threats evolve.

Operationally, SEWIP Block 3 is designed to protect ships against radio-frequency guided anti-ship missiles by detecting hostile emissions early, analyzing them, warning the crew, and then disrupting the seeker or fire-control chain before the weapon can complete a clean engagement. Northrop says the system provides early detection, signal analysis, and threat warning, while Navy material emphasizes that Block 3 is specifically intended to keep pace with the evolving anti-ship missile threat and provide a common electronic-attack capability across surface combatants fitted with the active AN/SLQ-32 variant. For fleet commanders, that translates into a deeper defensive magazine and a better chance of defeating complex salvos before they force a hard-kill shot.

At the tactical level, Block 3 is especially valuable in saturation scenarios, where modern sea-skimming missiles may arrive with multiple seekers, coordinated azimuths, and limited reaction time. A capable shipboard jammer can degrade targeting quality, create angular or range uncertainty, and complicate terminal homing, buying critical seconds for the combat system to layer decoys and interceptors behind the electronic attack. That is why SEWIP Block 3 fits squarely into the Navy’s Distributed Maritime Operations and Electromagnetic Maneuver Warfare concepts: it does not simply defend one hull, it contests the battlespace in a way that can preserve missiles, disrupt enemy sensing, and keep a task group tactically coherent under pressure.

The rollout path also shows how seriously the Navy treats the capability. The first installation was completed on the Flight IIA Arleigh Burke-class destroyer USS Pinckney, whose modified topside makes the new apertures visibly obvious, and reporting indicates the Navy plans around 20 Flight IIA backfits under DDG MOD 2.0 before extending the architecture to carriers and large-deck amphibious ships.

Industrial logic is equally important. Northrop won the Block 3 engineering and manufacturing development effort in 2015, the first two low-rate initial production units were ordered in 2018, the first major follow-on production contract came in 2020, and the Navy is now stacking additional production actions on top of that base. The acquisition pattern suggests confidence in the design, but it also highlights a constraint: Janes has reported that full SEWIP Block 3 carries a significant size, weight, power, and cooling burden, which is one reason the Navy is separately pursuing a smaller Scaled Onboard Electronic Attack solution for ships that cannot accept the full AN/SLQ-32(V)7 fit.

The larger point is clear: SEWIP Block 3 is one of the U.S. Navy’s most consequential survivability upgrades because it changes the cost exchange in naval combat. Instead of answering every inbound threat with an interceptor, the fleet gains an electromagnetic weapon that can blind, seduce, delay, or break the attack sequence at lower marginal cost and with greater persistence. As anti-ship missile inventories expand in the Indo-Pacific and other contested theaters, the Navy’s decision to accelerate Block 3 production is less a routine contract story than a signal that soft-kill naval warfare is becoming a front-line combat capability, especially for destroyers, carriers, and amphibious capital ships expected to fight inside dense threat rings.