The Department of Defense, through the NAVSUP Weapon Systems Support office, is issuing a presolicitation for a sole-source contract to Undersea Sensor Systems Inc. for the repair of the SDSR, AIRCRAFT EQUIP (NIIN: 015728130, Part Number: 6120-0500-001) specifically for H-60 aircraft. This procurement is critical as Undersea Sensor Systems Inc. is the Original Equipment Manufacturer (OEM) and the only known source for this repair, with no available drawings or data, and the government lacking the necessary data rights. The contract is set for a duration of one year, with proposals due by January 29, 2026, and an anticipated award date in March 2026; interested parties may submit capability statements within 15 days of the solicitation issue date, which is expected around December 30, 2025. For further inquiries, contact Grace Y. McGinley at (215) 697-2198 or via email at GRACE.V.MCGINLEY.CIV@US.NAVY.MIL.