The Government is conducting market research to identify potential sources qualified to repair/remanufacture multiple NSNs to ensure full compatibility with JSECST AN/USM 670/670A Subassemblies, with repair services planned under a five-year contract (basic plus four ordering periods) continuing through FY33. Projected quantities are Best Estimated Quantities of 128 per year across the listed NSNs and associated data items. The effort uses an RMC (R3) repair approach, requires all contractor personnel handling items to possess a valid security clearance, and requires the contractor to furnish all material, support equipment, tools, test equipment, and services and to maintain/calibrate support