1. Preliminary chart of Port Royal entrance, Beaufort, Broad and Chechessee Rivers, South Carolina Yale Public content 1863. 2013-09-23T19:08:36Z. 2013-09-23T19:08:36Z. United States Coast Survey, issuing body. U.S. Coast Survey. English. Public. Port Royal Sound (S.C.) and Hilton Head Island (S.C.).