You can find the full digital copy of The Nautical Almanac for the Year 1988
Disclaimer: Always verify navigation using modern electronic charts. The 1988 Nautical Almanac is a tool for education, history, and hobbyist celestial navigation, not for primary commercial navigation in 2026. nautical almanac 1988 pdf top
US Naval Observatory Astronomical Applications Department (.mil) You can find the full digital copy of
Sun, Moon, and Planets
Greenwich Hour Angle (GHA) and Declination for the Sun, Moon, and four navigational planets (Venus, Mars, Jupiter, Saturn). GHA of Aries for sidereal time calculations. and hobbyist celestial navigation