; or (3) with a coastwise endorsement under chapter 121 of title 46, United States Code. (d) Report on increasing effectiveness of marine highways (1) In general Not later than one year after the date of the enactment of this Act, the Administrator of the Maritime Administration shall complete and make publicly available on an appropriate website a study that identifies opportunities for, and barriers to, increasing the effectiveness of marine highways designated under section 55601 of title 46, United States Code, in addressing two or more of the components described in clauses (i), (ii), and (iv) of subparagraphs (A) and subparagraph (B) of section 50307(a)(2) of title 46, United States Code. (2) Pilot program Beginning on the date that is 120 days after the date of the completion of the study required under paragraph (1), the Administrator shall carry out a one-year pilot program under which the Administrator shall select one marine highway project and implement the findings of the study with respect to that project. (3) Final report Not later than 90 days after the completion of the pilot program under paragraph (3), the Administrator shall provide to the Committee on Commerce, Science, and Transportation of the Senate and the Committee on Transportation and Infrastructure of the House of Representatives, a briefing on the lessons learned from the pilot program, any recommendations based on feedback from maritime stakeholders, States, Indian Tribes, nonprofit organizations, and other stakeholders, and recommendations for establishing future marine highways in the United States. (e) Study on availability of Federal student aid for mariner training (1) In general The Comptroller General of the United States shall conduct a study of the availability of Federal financial assistance for licensed and unlicensed mariners, as applicable, for mariner training and the effectiveness of coordination with respect to such assistance of— (A) Federal agencies; (B) Federal agencies and States