Calibogue Sound is situated between the islands of Daufuskie and Hilton Head and connects Intracoastal Waterway and the Harbour Town Marina with the Atlantic Ocean . Calibogue Sound is between Daufuskie and Hilton Head Islands . It connects the Intracoastal Waterway and the Harbour Town Marina with the Atlantic Ocean . Calibogue Sound is located between Daufuskie and the Atlantic Ocean , connecting the Hilton Head Islands and the Harbour Town Marina with Intracoastal Waterway .