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 83
me intermediate value between these extremes. Dividing the totaldifference of longitude into a number of equal parts MPmlf m1Pm2, etc., of such smallextent that, for the purposes of conversion, the change of latitude corresponding to each may be neglected, we nave the total departure made p up of… … 1 sec MT+cZ2r2, sec s, sec m2r2, -fete. mtmfFIG. 26. Now, if LL be a parallel of latitude lying midwaybetween Tn and T%, since there will be as many of thesmall parts lying above as below it, and since for moderatedistances the ratio to be employed in the conversion ofdeparture and difference of…
Navigation · Nautical astronomy
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