USCG Exam PracticeThree-bearing fix and cocked-hat triangle
A navigator takes a bearing on a lighthouse, then 12 minutes later takes a second bearing on the same lighthouse after the vessel has traveled 2.0 nautical miles. The navigator then advances the first LOP along the DR track to the time of the second bearing. The resulting position is properly termed a:
- A. Fix
- ✓ Running fixCorrect
- C. Doubling-the-angle fix
- D. Radar fix
Why B is correct
When LOPs cannot be taken simultaneously, the first LOP is advanced along the DR track to the time of the second observation; the intersection is a running fix, which is less accurate than a simultaneous fix. Bowditch Ch. 7 §702.
Cited:Bowditch Ch. 7 §702