No predictions loaded for 1993. This site serves NOAA predictions from its own store, and this period has not been fetched for Isle Au Haut 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/me/isle-au-haut-8414288/1993
Isle Au Haut, ME tide table 1993 (printable) · Tide Almanac