This solicitation will be for repair NIINs only. The anticipated LTC is in support of the WSN-7 Inertial Navigation system and is used on Surface ships. This solicitation will be solicited for award of a firm fixed price contract for the listed NSNs. The approved sole source is Northrop Grumman CAGE 03956. The NSNs will have variable quantities for a five-year period with no option years. The FOB: Origin; Inspection/Acceptance: Origin.