The Department of Defense, specifically the Department of the Navy, is seeking proposals for the repair and modification of sonar receiving sets under a total small business set-aside contract. The procurement involves the acquisition of five units of NSN 7H-5845-016871753, with delivery required to Lockheed Martin Corporation in Manassas, VA. These underwater sound equipment components are critical for naval operations, and the government has determined that it is uneconomical to reverse engineer or procure data rights from additional sources. Interested parties should contact Jordan D. Neely at the provided email or phone number for further details, as the solicitation is expected to follow the guidelines outlined in FAR clause 52.209-1 regarding qualification requirements.