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Raytheon, under contract with U.S. Naval Air Systems Command, expects to complete development of the JSOW Block II in early 2006. Block II is planned to reduce JSOW unit cost by reducing the parts count and improving the manufacturing process.
All variants of future JSOW will be manufactured in the Block II configuration. Block II will maintain all of the standoff and survivability of the current JSOW and include an improved anti-jam Global Positioning System receiver.
Development of a new payload option for the JSOW A is underway which should also be complete in early 2006. The new version will use a unitary 500 pound BLU 111 warhead.