Here we go again.
The navigation act of 1817. The Warehousing act.
This was the result. Vast bulk of all export cargo left southern ports. Virtually all the import cargo came into New York.
Navigation act of 1817 only required cargos between American ports to be carried by an American flagged ship.
A ship load of shoes, out of Boston bound for New Orleans had to carried by an American ship. A load of cotton out o New Orleans bound for Boston had to be carried by an American ship. The law affected everyone equally.
It in no way limited international commerce between the Southern States and their customers in Europe.
How did the Warehousing act adversely affect Southern Commerce