The AN/SPY-6 is an active electronically scanned array (AESA) 3D radar system developed and built by RTX Corporation, and in service with the United States Navy (USN). It provides integrated air and missile defense for Flight III Arleigh Burke-class destroyers. Variants are under development for retrofitting Flight IIA Arleigh Burkes and for installation aboard Constellation-class frigates, Gerald R. Ford-class aircraft carriers, America-class amphibious assault ships, and San Antonio-class amphibious transport docks. The first delivery of the AN/SPY-6 to the USN took place on 20 July 2020.