American practical navigator: an epitome of navigation and nautical astronomy (1914)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Equipment, Logan, George Wood, 1868-1915 · Washington, Govt. Print. Off. · leaf 72
anger angleinvolves the same general prmciple, ascan be readily seen without explana-tion by reference to the figure 22 in wliich AB represents a vertical object of knownheight. 157. The Danger Bearing.—This is a method by which the navigator is warnedby a compass bearing when the course is leading… … approached within a certain distance, the landmark A being a guide. Let the navigatordraw through A the line XA, clear of the danger at all points, and note its directionby the compass rose; then let frequent bearings be taken as the ship proceeds, andso long as the bearings, YA, ZA, are to the…
Navigation · Nautical astronomy
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