A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. (1902)
Thoms, William · New York : Printed for the author and sold by John Bliss & Co · leaf 159
n Table V. Call this the Correetion. Correct the Declination, and fiuc. tbi Polar Distance, as usual Also correct the Latitude to the place of Obserration by the rules already given. Add together the Latitude and ^o^B.r- Distance, from which tubtract the above Correction. Take half this Sum,Jd… … This figure represents the elements for computing the Hour Angle m the usual maimer, being the thretB-ies of an Oblique Angled Spherical Triangle, viz: the Co-Latitude 51° 18, the Polar Distaace 108* 51,and the Co-Altitude 90, to find the Hour Angle at the Pole, and which, measured on the Equator,…
Navigation · Nautical astronomy
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