The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure two units of the Receiver-Transmitter (NSN 7R-5821-015855355-P8, REF NR 822-2158-002). This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals. The item is essential for maintaining quality and reliability in military operations, and the government intends to negotiate with only one source under FAR 6.302-1. Interested parties must provide the necessary documentation for source approval and submit their proposals within 45 days of this presolicitation notice. For further inquiries, contact Sara M. Hojnowski at (215) 697-2198 or via email at SARA.HOJNOWSKI@NAVY.MIL.