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 97
egarding the distances measured to the right hand of HI and above FE as positive; those to the left hand of HI and below FE as 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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