USCG Exam PracticeDanger bearings and danger circles
Bowditch describes the 'doubling-the-angle' technique for obtaining a running fix. What does this method determine?
- A. The vessel's speed made good over the ground
- ✓ The distance to the observed object at the time of the second bearingCorrect
- C. The compass error by comparing two bearings to the same object
- D. The set and drift of the current affecting the vessel
Why B is correct
Bowditch Ch. 7 §703 states that the doubling-the-angle technique uses two relative bearings to a single object, and the distance run between the two bearings equals the distance to the object at the time of the second bearing. This is a standard running fix technique, not a method for determining speed, compass error, or current.
Cited:Bowditch Ch. 7 §703