No predictions loaded for 1994. This site serves NOAA predictions from its own store, and this period has not been fetched for Cove Point 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/md/cove-point-8577188/1994
Cove Point, MD tide table 1994 (printable) · Tide Almanac