The Department of Defense, specifically the Department of the Army, is seeking potential sources capable of providing field technical assistance, system overhaul, system RESET, and repair of spares for the AN/TPN-31 Air Traffic Navigation Integration and Coordination System (ATNAVICS) and the AN/FPN-67 Fixed Base Precision Approach Radar (FBPAR). The selected vendor will need to demonstrate their ability to perform these services, including any necessary software modifications, as the original software is proprietary to Raytheon Electronic Systems and not available for competitive procurement. Interested vendors must submit a response detailing their qualifications, previous experience with similar contracts, and company information, with submissions limited to 10 pages. For inquiries, potential respondents can contact Eric Fulmer or Shawn Jamerson via the provided email addresses.