The Government lacks sufficient data to acquire or repair this flight-critical item from any source other than the current approved source(s), and only previously approved sources have been solicited. A new source must obtain Government source approval before award and submit the required NAVSUP WSS Source Approval Brochure information with its proposal; offers missing required data or prior-submission documentation will not be considered. The proposed action is a one-source negotiation under FAR 6.302-1, and this notice is not a request for competitive proposals, though responsible sources may identify interest/capability or submit proposals. If source approval cannot be processed in time or approval requirements prevent timely delivery, award may proceed based on Fleet support needs. The requirement is for quantity 8 EA, with delivery FOB origin.