the authority in subparagraph (A), the Secretary shall ensure that any conversion, modernization, maintenance, or repair of vessels occurs in shipyards located in the United States, except in emergency situations (as determined by the Secretary). . (c) Definition of Maritime Security Fleet Subsection (k) of such section is amended by adding at the end the following new paragraph: (5) The term Maritime Security Fleet means the fleet established under section 53102(a) of title 46. . (d) Technical amendment Subsection (i) of such section is amended by striking ( 50 U.S.C. App. 1744 ) and inserting ( 50 U.S.C. 4405 ) . 1019. Surveying ships (a) Surveying ship requirement Not later than 120 days after the date of the enactment of this Act, the Chief of Naval Operations shall submit to the congressional defense committees a report setting forth a force structure assessment that establishes a surveying ship requirement. The Chief of Naval Operations shall conduct the assessment for purposes of the report, and may limit the assessment to surveying ships. (b) Definitions In this section: (1) The term surveying ship has the meaning given the term in Secretary of the Navy Instruction 5030.8C. (2) The term force structure assessment has the meaning given the term in Chief of Naval Operations Instruction 3050.27. 1020. Pilot program on funding for national defense sealift vessels (a) In general The Secretary of the Navy may carry out a pilot program to assess the feasability and advisability of the use of the authorities specified in subsection (b) in connection with research and development and operation, maintenance, and lease or charter of national defense sealift vessels. (b) Authorities The authorities specified in this subsection are authorities as follows: (1) To derive funds for obligations and expenditures for research and development relating to national defense sealift vessels from the Research, Development, Test, and Evaluation, Navy account. (2) To derive funds for obligations and expenditures for operation,