Northrop Grumman Systems Corp. in Melville, NY makes the AN/SPQ-9B radar system. Its mission is to serve as a primary fire control or backup radar that can detect and track low-flying, high-speed, small radar cross-section anti-ship missile targets in heavy clutter environments. That’s especially useful amidst waves, or close to shore.
The SPQ-9 is not a new radar, though it has received a number of upgrades over the years. It was originally built to be the main air defense radar on several American destroyer and cruiser classes, but over time it has been relegated to a secondary role on advanced air defense ships to fill in coverage gaps, or a slot on some amphibious ship classes as a relatively inexpensive, medium-capability main radar. Orders continue, and the radar received a new lease on life when it was picked as the X-band portion of America’s new dual-band AMDR radar.