South Carolina vessel tax

[Dockhand]

I have been told that vessels purchased in SC pay 10% tax on the selling price, but No taxes would be due if the vessel leaves the state before 180 days from the purchase date.
Two questions;
1) what is the taxes due on a purchase of used vessel, purchased in South Carolina that stays in SC?
2) How many days do you have until you have to leave SC to avoid paying tax on the vessel?

[Flyingriki]

South Carolina Boating - Government Affairs - BoatUS