The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of salinity meters, identified by NSN 7R-6630-014493585-SR, with a quantity of 11 units required. This procurement is critical as the item is flight critical, necessitating government source approval prior to contract award, and only previously approved sources will be considered for solicitation. Interested vendors must provide comprehensive technical data and documentation as outlined in the NAVSUP Source Approval Information Brochures, and failure to comply 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.