Hydrographical Surveying a Description of the Means And Methods Employed in Con
Hydrographical Surveying a Description of the Means And Methods Employed in Con
W J L William James Lloyd Wharton
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Our opinion is that, temperature being left out of the question, a better result is likely by using a uniform sea rate. CHAP. Xiv. CHRONOMETRIC MERIDIAN DISTANCE. 263 The algebraic formula for meridian distance by above Formula method of uniform sea rate, is, Delation'" M =X -X + r X 2- X ~ M 1 t Where M is meridian distance between the terminal points A and K of the voyage. MX is meridian distance between port of departure, and a port B touched at on the voyage. X is error at A on leaving. X x..., B on touching. X 2 K on arriving. t is interval between observations at A and K. r A and B. In any case of a ship's calling at a place as an inter- mediate port on her voyage between two other places, it may be well to send home, beside the meridian distance obtained in the ordinary manner, the information which would enable the office, if or when it possesses the true difference of longitude between the terminal ports, to calcu- late the difference of longitude of the intermediate place by the last formula.
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