American practical navigator: an epitome of navigation and nautical astronomy (1914)
Bowditch, Nathaniel, 1773-1838, Logan, George Wood, 1868-1915, United States. Navy Dept. Bureau of Equipment · Washington, Govt. Print. Off · leaf 49
FROM 180° SOUTH TO 360° NORTH DEVIATION DEVIATION WEST SOOTH EAST … of Total Deviation of Semicircular Component of Quadrjjm-tal Component FIG. 9. The curve shown in the full line on figure 9 corresponds to the table of deviationsgiven in article 93. From a given^ compass course to find the corresponding magnetic course, through thepoint of the vertical fine…
Navigation · Nautical astronomy
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