Program Briefing

The AN/APS-149(V) Littoral Surveillance Radar System (LSRS) is a classified and little known surveillance radar that was first seen by the public in 2007, mounted on US Navy P-3C Orion maritime patrol aircraft (MPAs). Its ventral “canoe” antenna, and reported capabilities, are equivalent to those of Northrop Grumman’s AN/APY-3 JSTARS radar, and include a primary targeting capability. Seven radars had already been delivered by mid-2007, with 16 modified Orions reportedly capable of carrying the radar. Though some AAS-related contracts have been announced, the program has never had an unclassified budget line or documentation. None of its elements have reportedly been competed or subjected to a formal analysis of alternatives process. In mid-2008, it became known that the Navy was developing Boeing’s 737-based P-8A Poseidon Multimission Maritime Aircraft (MMA) with the “provision” to mount the APS- 149, although the re-designated AN/APY-10 development of Raytheon’s P-3C legacy AN/APS-137(V) radar was still planned and under contract as the primary maritime radar for all P-8As.

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