General Navigation USCG Question #1833 (Set 57)

You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 082°

Per Bowditch, the ideal geometric intersection for two lines of position is 90 degrees to minimize fix error. A lighthouse bearing of 356° combined with a second object bearing 082° yields an intersection angle of 86 degrees, approaching the ideal perpendicular cut.

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