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 204
MARINE SURVEYING. 197 … FIG. 65. the dot, lay off the two observed angles right and left of the line; then, laying thison the plan, move it about till the three lines pass exactly through the three stationsobserved. The dot from which they were laid off will be on the position of the observer,and must be pricked lightly…
Navigation · Nautical astronomy
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
