The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of four units of a flight-critical electronic countermeasures set, identified by NSN 7R-5865-016999355-P8 and reference number 698558-303. This procurement requires government source approval prior to contract award, as the item is deemed critical for flight operations, and only previously approved sources will be considered for solicitation. Interested vendors must submit detailed technical data and documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and failure to provide the required information will result in disqualification from the award process. For inquiries, interested parties can contact Timika Nicholson at (215) 697-2582 or via email at TIMIKA.NICHOLSON@NAVY.MIL.