The Department of Defense, through the Naval Supply Systems Command (NAVSUP) Weapon Systems Support, is seeking proposals for the repair and modification of a specific receiver-transmitter unit, identified by NSN 7R-5895-016334164, with a quantity of 15 units required. This procurement is classified as a sole source requirement, indicating that the government lacks sufficient data to contract with any source other than the current supplier, necessitating Government Source Approval prior to award. The items involved are critical for military communications and are subject to Free Trade Agreements and the World Trade Organization Government Procurement Agreement. Interested vendors must submit the required documentation as outlined in the NAVSUP WSS Source Approval Brochure, which is available online, and should direct any inquiries to Cody P. Cameron at cody.p.cameron@navy.mil. Proposals must be submitted in accordance with the guidelines provided, as offers lacking the necessary data will not be considered.