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 172
ed in latitude and longitude,classifying them under Case I or Case II. 2. Take from Table 48 the latitude factors f^ and fj,respectively, for the Sumner lines. 3. The difference between the latitudes of the points ofthe two Sumner Unes, in the common longitude, divided bythe sum of the latitude… … Fig. 60.
Navigation · Nautical astronomy
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