Despite The Proliferation Of Electronic Navigational Devices, Celestial Navigation Remains An Essential Tool For Those Who Do Not Wish To Be Caught Short When Modern Technology Fails. In This Easy-to-use Guide, Hewitt Schlereth Explains Clearly And Concisely How To Navigate Any Stretch Of Sea Using Only A Handheld Sextant, A Watch, A Plotting Sheet And A Copy Of The Nautical Almanac. The Basic Process Is Simple: Take A Sight With A Sextant, Establish A Secondary Reference Or Benchmark Sight, Compare The Two, And Plot The Results Of The Comparison On A Chart.celestial Navigation In A Nutshell Demonstrates How To Take Sights By The Sun, Moon, Stars And Planets, Discussing The Advantages And Disadvantages Of Each Method.