The Department of Defense, through the Department of the Navy's NAVSUP Weapon Systems Support, is seeking proposals for the repair or modification of frequency converters, specifically under the NSN 7R-5895-015874239-P8. This procurement involves a quantity of three units and requires government source approval prior to contract award due to the flight-critical nature of the item and the inadequacy of available technical data for full and open competition. Interested vendors must provide comprehensive documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and failure to submit the required data 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.