USCG Exam PracticeThree-bearing fix and cocked-hat triangle
When using the doubling-the-angle method to obtain a running fix on a single charted object, which of the following statements is correct?
- A. The distance run between the first and second bearing equals the distance off the object at the first bearing
- ✓ The distance run between the first and second bearing equals the distance off the object at the second bearingCorrect
- C. The method requires the relative bearing to remain constant between observations
- D. The method requires simultaneous bearings to two separate objects
Why B is correct
Bowditch Ch. 7 §703 specifies that in the doubling-the-angle technique, the distance run between the two relative bearings equals the distance to the object at the time of the second bearing. The relative bearing must change substantially, not remain constant, and only one object is required.
Cited:Bowditch Ch. 7 §703