It's pretty easy to make a limited case that should convince you, though not very amusing, I'm afraid.
> [The Jones Act] requires that all goods transported by water between U.S. ports be carried on ships that have been constructed in the United States and that fly the U.S. flag, are owned by U.S. citizens, and are crewed by U.S. citizens and U.S. permanent residents.
Repeal all provisions save for the requirement of having to be constructed in the US.
It's not what I would suggest (an outright repeal would be better), but it's easy to see how this partial repeal would strengthen the US shipbuilding industry: you are making their products more useful and cheaper to operate.
For comparison, you can have a look at eg German shipbuilding. Germany isn't exactly a low-cost country, has no equivalent of the Jones Act, and is doing some shipbuilding. (They aren't the biggest player in building whole ships, but the world loves to import German Diesel engines. Division of labour and all that.)
> [The Jones Act] requires that all goods transported by water between U.S. ports be carried on ships that have been constructed in the United States and that fly the U.S. flag, are owned by U.S. citizens, and are crewed by U.S. citizens and U.S. permanent residents.
Repeal all provisions save for the requirement of having to be constructed in the US.
It's not what I would suggest (an outright repeal would be better), but it's easy to see how this partial repeal would strengthen the US shipbuilding industry: you are making their products more useful and cheaper to operate.
For comparison, you can have a look at eg German shipbuilding. Germany isn't exactly a low-cost country, has no equivalent of the Jones Act, and is doing some shipbuilding. (They aren't the biggest player in building whole ships, but the world loves to import German Diesel engines. Division of labour and all that.)