The Nautical Almanac 1981 - Book

This is The Nautical Almanac for the year 1981, a 318-page, 8.5 x 11 inch paperback reprint credited to the Nautical Almanac Office of the U.S. Naval Observatory and H.M. Nautical Almanac Office. The almanac series goes back to the first issue of The Nautical Almanac and Astronomical Ephemeris, for 1767, the first nautical almanac with data dedicated to finding longitude at sea.

The two offices have published a single, unified Nautical Almanac since the issue for 1960, and 1981 was the year the British and American titles and contents were fully merged. Each annual volume holds the data for its own year only, so this edition is a historical reference for that year. Paradise Cay prints this title on demand.