General Navigation USCG Question #1841 (Set 57)

You take bearings of 313°T and 076°T on two objects. Which bearing of a third object will give the best fix?

Official USCG Answer & Rule Citation

Correct Answer: Option D — 187°T

Bowditch principles dictate that three-bearing fixes achieve maximum accuracy when lines of position intersect at 120-degree angles. Bearings of 313°T and 076°T form a 123-degree angle; a third bearing of 187°T completes the symmetrical 120-degree separation across the circle.

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