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 85
s frequently occurs in this method, either of two means may beadopted: the problems may be worked by trigonometrical formulae, using logarithmsor the given quantities involved may all be reduced by a common divisor untilthey fall within the traverse table, and the results, when obtained,… … FIG. 27. tanC = D.Lo = mtanC; m = D.LocotC. THE SAILINGS. 79 EXAMPLE: A ship in Lat. 42° 30 N., Long. 58° 51 W., sails SE. by S., 300 miles. Required thelatitude and longitude arrived at. From Table 1: Course, SE. by S., Dist., 300; we find Lat. 249.4 S. (4° 09.4).Latitude left, 42° 3(X.O N. Merid.…
Navigation · Nautical astronomy
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