The government intends to solicit and negotiate with only one approved source for a flight-critical part requiring engineering source approval, with quantity of 4 units and delivery FOB origin. Only sources previously approved by the government have been solicited; new sources must submit detailed source approval information as specified in NAVSUP WSS brochures, or evidence of prior submission, or their offers will not be considered. Approval of a new source typically cannot be completed in time to delay award, so the requirement may be awarded based on fleet support needs even if an alternate source's request is pending. Interested parties may identify their capability, but this is not a request for competitive proposals, and the government retains sole discretion on whether to compete. Award will be made only if the offeror, product, or manufacturer meets qualification requirements at the time of award.