CELESTIAL NAVIGATION FOR YACHTSMEN this edition should appear 44 years after the first British edition and 27 years after its first publication In the U.S. is eloquent testimony to the authors clear, concise explanation of a difficult skill. Through those years, Celestial Navigation for Yachtsmen has been the best-known, best-loved primer on the subject throughout the English-speaking world. It successfully teaches sailors who have been demoralized by bigger books. It remains the famous little book on celestial navigation. This Edition substitutes the Nautical Almanac for the Air Almanac, discusses the short tables based on H.O. 211, expands the discussion in a few areas, fine-tunes it in others, and shows how to advance a line of position for a running fix from sun sights. The only mathematics involved are straightforward addition and subtraction.