The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the procurement of two main modules, identified by NSN 7R-1615-016751816-CB and reference number 70351-38100-052. This is a sole source requirement, indicating that the government lacks sufficient data to contract with any source other than the current supplier, and the items are subject to Free Trade Agreements and the World Trade Organization Government Procurement Agreement. Interested vendors must obtain Government Source Approval prior to award, and must submit the necessary documentation as outlined in the NAVSUP WSS Source Approval Brochure, which is available online. For further inquiries, potential bidders can contact Danielle M. Cutrera at danielle.cutrera@navy.mil or by phone at (215) 697-6566.