Creates a package of programs, funding, tax changes, and rules to rebuild and strengthen the U.S. merchant marine, shipyards, and maritime workforce so more international cargo moves on U.S.-flag vessels and the nation’s sealift capacity is secure. It establishes a Maritime Security Trust Fund, new shipbuilding and finance incentives, workforce training and recruitment programs, modernization of merchant mariner credentialing, studies and reports, and a range of tax incentives and exemptions tied to maritime activity.