The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 228
uteintersections, have been insufficiently determined, as the chimney, cupola, &c., are again intersected. Other pro-secting lines are .taken from e upon other points which present themselves, the necessary sketching made, and anew forward line taken to the next station. During all these… … THREE-POINT PROBLEM. Art. 437« It is often expedient to set up the table in position at an undetermined point without any backline en which to set. With three signals in view, whose positions are projected on the map, the table can beoriented and the point determined by means of the well known…
Navigation · Nautical astronomy
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