To be clear, small ships were an indirect effect of the Jones Act, as the Jones Act did not specifically mandate the size of the vessel only that they be owed, operated and crewed by Americans. The Act applies to marine transport between US ports only. Today, the smaller vessels are the direct result of the lack of ship yard capacity to build the larger more cost efficient supertankers. The Jones Act was a 100% protectionist legislation that is over 100 years old and is obsolete. It was run through Congress by Wesley Jones of Washington which is a huge ship building state in response for the need to build new ships after the losses suffered in World War I. Ultimately, the maritime industry benefited while other American businesses and the buying public suffered. The perfect special interest legislation.