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 692
TTSEFUT. PROBLEMS. 645 Cruising alongshore, two headlands P and (J were in sight. From A the bearing of P was N. E.; the bearingof Q was E. N. E. Running to B, which was E. by S., lo miles, the bearing of P then was N. by E., and of Q N. E. by N I … Required the bearing and distance between P and Q. In the triangle APB there are known AB= lo miles, PAB = 56o 15, PBA = 90°; to find PA. AB ^. AB Cos PAB: PA PA: ■ cos PAB AB=ioPAB = 56*^ 15 log I.00000 log cos 9-74474 PA =18 log 1.25526 Now, in the triangle ABQ there are known AB =; 10, QAB = 33°…
Navigation · Nautical astronomy
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