INTRODUCTION THIS SOURCES SOUGHT IS NOT A REQUEST FOR PROPOSAL. It is a market research tool being used to determine potential and eligible businesses capable of providing the supplies/services described herein prior to determining the method of acquisition and issuance of a Request for Proposal. The Government is not obligated to and will not pay for any information received from potential sources because of this notice. The Naval Air Systems Command, (NAVAIR) Patuxent River, Maryland, Air Traffic Management Systems Program Office (PMA-213) intends to award a Fixed Price Basic Ordering Agreement (BOA) order on a sole source basis for supplies and services associated with Digital Interrogator (DI) AN/UPX-45 and AN/UPX-50 RP2 Trouble Report (TR) Software Corrections. Specifically, this effort requires the identification, test, and implementation of trouble reports to correct software discrepancies that impact MODE 5 reliability and aircraft safety. The anticipated period of performance is 18 months with an estimated value of $4M. The work associated with this requirement is expected to be performed at the contractor's facilities within the United States. No work at Government sites is anticipated. The specific place(s) of performance will be determined based on the location of the contractor selected for any resulting contract. 2.0 BACKGROUND AN/UPX-45 DI's are the currently fielded system which are in sustainment until they are retrofitted to AN/UPX-50 configuration. Current production of AN/UPX-50 DI systems is performed on the Firm Fixed Price, N00019-23-C-0046 contract by BAE Systems, Information and Electronic Systems Integration. The AN/UPX-50 DI supports both ground-based and shipboard weapon system platforms to satisfy Mark XIIA Identification Friend or Foe (IFF) and Mode S requirements. 3.0 REQUIRED CAPABILITIES Supplies and services to be procured will support the Navy's requirement to sustain currently fielded AN/UPX-45 DI systems, as well as procure and deliver the AN/UPX-50(C) DI units to support ongoing ship installations from now through FY29. These requirements are in support of USN ship classes: DDG, LHA, LHD, LPD, CVN; Navy training; US Coast Guard; and Foreign Military Sales. NAVAIR estimates deliveries of updated AN/UPX 45 and AN/UPX 50 DI's with RP2 trouble report software corrections are needed no later than FY28. These efforts require highly specialized skills and knowledge of the AN/UPX-45 and AN/UPX-50 DI system design and engineering details to complete the RP2 TR software correction effort to meet the stringent schedule. This effort includes engineering and technical support services to update proprietary software and coding developed by BAE Systems to ensure compliance with current Air Traffic Contract Radar Beacon System IFF Mark XII Systems (AIMS) certification and MODE 5 requirements. The Navy did not procure the Technical Data Package or necessary software that would allow another source to produce these efforts.…