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 97
ding the distances measured to the righthand of HI and above FE as positive; those to the left hand of HI and below FEas negative. An exemplification of this system is found in the chart, on which FE is representedby the equator, HI by the prime meridian; the coordinates x and y being the… … 90 DEFINITIONS RELATING TO NAUTICAL ASTRONOMY. circle must be selected as the primary, and some particular point of it as the origin.Thus, in figure 31, which represents the case of a sphere, some fixed great circle,CBQ, is selected as the axis and called the primary; and a point C is chosen as the…
Navigation · Nautical astronomy
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