Either what Reck22 says, or call it a Delta Queen. I can't find that name
used anywhere, plus SoCo's origins are in New Orleans, near the delta of the
Mississippi River. For added measure, production of SoCo shifted over time
from New Orleans to Memphis (though the company is now based in Louisville,
Kentucky). Much of the area surrounding Memphis to the south and southwest is
often referred to as The Delta. It would also share a name with a popular
Mississippi River-based steamboat that offers river cruises.