American practical navigator: an epitome of navigation and nautical astronomy (1914)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Equipment, Logan, George Wood, 1868-1915 · Washington, Govt. Print. Off. · leaf 44
Figures 7 and 8 represent, respectively, examples of easterly and westerly errors.In both cases consider that the circles represent the observers horizon, N and Sbeing the correct north and south points in each case. If N and S represent thecorresponding points indicated by a compass whose needle…
Navigation · Nautical astronomy
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
