You mean like the one packet line that ran for a while between New Orleans and Europe? Again, if there was all that demand for imports in the southern states then why weren't more lines established?
Did you find the definition of packet line?
The thing I don’t get about all the antebellum apologists is, if the south were really feeling so put out about believing that they were being exploited through shipping practices by the north, why didn’t they employ their own ships?
We already know that in 1859 New Orleans was the 4th largest port in the US so they were already getting a clue about controlling their own destiny that way.