Litton Systems, Inc., Navigation Systems Div., Woodland Hills, Calif., is being awarded a $6,690,000 modification to a previously awarded firm-fixed-price contract (N00019-05-C-0074) for the procurement of one AN/UPX-24(V) Interrogator set, 9 control indicators, and 14 retrofit kits for the U.S. Navy. The AN/UPX-24(V) Interrogator Set is one of two major subsystems that provide a centralized identification system for Fleet tactical ships. Work will be performed in San Diego, Calif. (90 percent) and Woodland Hills, Calif. (10 percent), and is expected to be completed in August 2008. Contract funds will not expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Md., is the contracting activity.