USCG Exam PracticeThree-bearing fix and cocked-hat triangle
A navigator is unable to observe more than one charted object and takes two successive bearings to it while running a steady course and speed. The first LOP is then advanced along the DR track to the time of the second observation. What type of position does this produce?
- A. A fix
- B. A danger bearing
- ✓ A running fixCorrect
- D. A three-bearing fix
Why C is correct
Bowditch Ch. 7 §708 describes exactly this procedure as a running fix. It is less reliable than a simultaneous two-object fix because it assumes course and speed were held exactly between observations.
Cited:Bowditch Ch. 7 §708