The AN/SPY-6 is an active electronically scanned array (AESA)[1] 3D radar system developed and built by RTX corporation, formally Raytheon, and in service with the United States Navy (USN).

[6] The S-band and X-band sensors will also share functionality, including radar navigation, periscope detection, and missile guidance and communication.

Ingalls has proposed the San Antonio-class amphibious transport dock as the basis for a ballistic missile defense cruiser with 6.1 m (20 ft) SPY-6.

Airborne AESA radar systems, like the APG-77, APG-81, and APG-79 used on the F-22 Raptor, F-35 Lightning II, and F/A-18E/F Super Hornet/EA-18G Growler, respectively, have demonstrated their capability to conduct electronic attack.

All the contenders for the Navy's Next Generation Jammer used Gallium Nitride-based (GaN) transmit-receiver modules for their EW systems, which enables the possibility that the high-power GaN-based AESA radar used on Flight III ships can perform the mission.

[18] Distributed sensing software allows AN/SPY-6 to form a network of bistatic radars, where forward-deployed sensors work in receive mode, while targets are illuminated by separate transmitters at the back.