No predictions loaded for 2002. This site serves NOAA predictions from its own store, and this period has not been fetched for Duck Island yet. Nothing is estimated or interpolated in its place. NOAA's own page for the station has the official table: tidesandcurrents.noaa.gov.
tidealmanac.site/us/sc/duck-island-8665145/2002
Duck Island, SC tide table 2002 (printable) · Tide Almanac