S.C. Code Ann. § 54-9-40

On the prosecution or trial of any indictment under the provisions of this chapter a copy of the articles of the ship or vessel, authenticated by the affidavit of the captain, sworn to before any notary public or magistrate of this State, shall be admissible in evidence and shall be sufficient to establish the fact that any seaman whose name appears subscribed thereto has signed the agreement contained in such articles until the contrary be made to appear by proof.