tidealmanac
No predictions loaded for 1997. This site serves NOAA predictions from its own store, and this period has not been fetched for Largo Sound, Key Largo 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/fl/largo-sound-key-largo-8723651/1997

Largo Sound, Key Largo, FL tide table 1997 (printable) · Tide Almanac