# SEWIP Block 3 Upgrade Signals Navy’s Electronic Warfare Modernization
The U.S. Navy has awarded Northrop Grumman a $334.4 million contract modification to manufacture up to nine additional Surface Electronic Warfare Improvement Program (SEWIP) Block 3 systems. The order includes the first complete shipset designated for installation aboard a nuclear-powered carrier, marking a significant milestone in the service’s electronic warfare modernization initiative.
SEWIP Block 3 represents the latest generation of electronic attack capabilities designed to protect naval vessels from evolving surface and air threats. The system enhances the Navy’s ability to detect, analyze, and counter hostile radar and communication signals across the electromagnetic spectrum. Installing these systems on carriers underscores their critical importance to fleet air defense operations, as carriers remain high-value assets requiring multi-layered protection in contested waters.
This contract modification reflects the Navy’s commitment to equipping its surface fleet with advanced defensive systems amid growing concerns over near-peer competition. The phased procurement approach—producing multiple shipsets through contract modifications—allows the service to integrate lessons learned while maintaining production momentum. As naval operations increasingly focus on contested environments where electronic warfare capabilities prove decisive, the deployment of Block 3 systems across the carrier fleet will substantially enhance protection against sophisticated maritime threats. Industry observers anticipate similar modernization across other major combatants in coming years.