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 211
not be employed. In this method the ship starts at one end of the field from a known position,fixed either by astronomical observations or by angles or bearings of terrestrialobjects having a determined location. Careful compass bearings or sextant anglesare taken from this position to all objects… … FIG. 68. MAKINE SURVEYING. 205 courses and patent log. From time to time other series of bearings or angles aretaken upon those objects ashore which are to be located, the direction lines plottedfrom the estimated position of the ship, and the various objects located by theintersections with their…
Navigation · Nautical astronomy
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