AN/SPQ-11

The AN/SPQ-11 Cobra Judy was a PESA radar found on the USNS Observation Island (T-AGM-23) missile range instrumentation ship.

[2] Thus, the AN/SPQ-11 represents the 11th design of an Army-Navy “Ship-mounted, Radar, Special Purpose” electronic device.

[2][3] The Cobra Judy Platform, USNS Observation Island was taken out of service and stricken from the Naval Vessel Register March 31, 2014.

[4] On 31 March 2014, the Cobra Judy Replacement program, aboard USNS Howard O. Lorenzen (T-AGM-25) reached initial operational capability (IOC).

According to the Naval Sea Systems Command (NAVSEA), the U.S. Air Force also assumed operational and sustainment responsibilities for the ship.

Aft view of the USNS Observation Island showing the location of the Cobra Judy array.