The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure a specialized underwater sound equipment part identified by NSN 7R-5845-016433222-P8, with a quantity of one unit required for delivery FOB origin. This procurement necessitates engineering source approval from the design control activity to ensure the quality and reliability of the part, as it is flight critical and requires unique design capabilities and manufacturing knowledge from approved sources. Interested vendors must submit their proposals along with the necessary documentation for source approval, as outlined in the NAVSUP WSS Source Approval Information Brochures, within 45 days of this presolicitation notice. For further inquiries, Kelly A. Gipson can be contacted at (215) 697-4787 or via email at KELLY.A.GIPSON1@NAVY.MIL.