S.C. Code Ann. § 50-25-1130

The operator of any motorboat who violates any of the provisions of this article is guilty of a misdemeanor and upon conviction shall be fined for a first offense not less than fifty-dollars nor more than two hundred dollars or imprisoned for not more than thirty days. For a conviction of a second offense the punishment shall be by a fine of not less than one hundred dollars nor more than two hundred or by imprisonment for not more than thirty days. For the conviction of third or subsequent offense the punishment shall be by a fine of not less than two hundred dollars nor more than five hundred dollars or by imprisonment for not more than six months or both such fine and imprisonment.