USCG Exam PracticeThree-bearing fix and cocked-hat triangle
Which of the following best describes a running fix?
- A. A fix obtained from three simultaneous compass bearings to charted objects
- ✓ A fix obtained by advancing a first LOP along the DR track to the time of a second observationCorrect
- C. A fix obtained from radar range and bearing to a single target
- D. A fix obtained by doubling the bow angle and measuring the distance run
Why B is correct
Bowditch Ch. 7 §702 defines a running fix as one obtained when LOPs cannot be taken simultaneously; the first LOP is advanced along the DR track to the time of the second observation, and their intersection is the running fix. It is less accurate than a fix from simultaneous LOPs.
Cited:Bowditch Ch. 7 §702