The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of 11 units of a flight-critical power supply, identified by NSN 7R-6120-015287505-YW and reference number 97E0380-1. This procurement requires Government source approval prior to contract award, as the item is deemed critical and the technical data available does not support full and open competition; only previously approved sources will be considered. Interested vendors must submit comprehensive documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and failure to provide the necessary data will result in disqualification from the award process. For further inquiries, interested parties can contact Christophe J. Ammerman at (215) 697-5047 or via email at CHRISTOPHER.AMMERMAN@NAVY.MIL.