As the sole designer, developer and manufacturer of the E-2D AHE aircraft weapon system, NGSC is the only source with the requisite knowledge, experience, and technical data required to successfully manufacture the aircraft without causing unacceptable delays in meeting the Navy’s operational requirements. In addition, an award to any other source would result in substantial duplication of cost to the Government that is not expected to be recovered through competition. The authority permitting other than full and open competition is Title 10, U.S. Code 2304 (c)(1), as implemented by FAR 6.302-1, ‘Only One Responsible Source’, and no other supplies or services will satisfy agency requirements.