The Nautical Almanac is a joint publication by the US Naval Observatory (USNO) and Her Majesty's Nautical Almanac Office (HMNAO). It provides the exact celestial positions (ephemerides) of the sun, moon, planets, and 57 navigational stars. Navigators use these coordinates alongside a sextant and a marine chronometer to determine a ship's position at sea. Why the 1988 Edition Matters
: You can find a complete digitized copy of The Nautical Almanac for the year 1988 available for free download or online streaming. nautical almanac 1988 pdf top
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