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 139
dicular to this line at O, and mark its intersection with the circumference Z. The line NS isthe horizon; Z is the zenith. The arc ZS is that portion of the meridian between the zenith and the southpoint of the horizon; the arc ZN is that portion of the meridian between the zenith and the north… … FlO. 51.
Navigation · Nautical astronomy
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
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