The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of five frequency converters (NSN 7R-5895-015874239-P8, REF NR 140K040G01). This procurement requires government source approval prior to contract award due to the flight-critical nature of the item and the inadequacy of available technical data to support full and open competition. Interested vendors must provide detailed technical data and documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and failure to comply will result in disqualification from the award process. For further inquiries, interested parties can contact Sarah E. Crompton at (215) 697-5809 or via email at SARAH.CROMPTON@NAVY.MIL.