There is deep mystery and profound satisfaction in finding your position on earth by reference to the sun, moon and stars--not to mention profound relief when the GPS receiver stops working in mid-passage. That is why knowledge of celestial navigation is still a rite of initiation, and its practice still a favorite pastime among serious cruisers. Celestial Navigation for Yachtsmen successfully teaches sailors who have been demoralized by bigger books. It remains the famous little book on celestial navigation. Among other changes this edition substitutes the Nautical Almanac for the Air Almanac discusses the short table 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 subtractions. Paperback.