Boeing Unveils Ultra-Low-Cost Radar Seeker ULCS at 2026 Symposium

Boeing unveiled its Ultra-Low-Cost Radar Seeker (ULCS) at the Space and Missile Defense Symposium in Huntsville, Alabama, on August 14, 2026. The seeker mounts on the nose of a missile or bomb to locate and guide the weapon. Seekers rank among the most expensive components of guided munitions, and Boeing said their cost has limited the quantities militaries can procure. The ULCS is an active seeker that transmits its own radar signals and is built largely from modified commercial components; it remains in development. Boeing plans to use it in air defense missiles, guided bombs, and cruise missiles, with a design that permits reuse across weapon types to avoid developing a separate seeker for each.

This summer, Boeing conducted multiple tests. Engineers evaluated the sensor design in an anechoic chamber, which absorbs stray signal reflections. The seeker was also carried aboard a Beechcraft 1900 aircraft on flights over land and sea, where it successfully acquired and tracked targets. At Spaceport America in New Mexico, the seeker tracked an overflying drone from a fixed ground position. Boeing then mounted it on a rocket simulating a missile, which was launched to track a second drone fitted with a reflector that returned the radar signal as a full-size target. The seeker survived the acceleration and vibration of these trials and successfully detected and tracked targets in each test.

Boeing said cross-weapon reuse is its primary selling point, with the aim of sharing a common sensor architecture. Further flight tests are planned for 2027 to approach more realistic scenarios. Lockheed Martin announced a similar modular sensor product, Strigo, on August 10, based on the same modular premise. Boeing did not disclose funding for the ULCS or its specific cost.