USCG Exam PracticeThree-bearing fix and cocked-hat triangle
Which statement best describes a running fix?
- A. A fix obtained from two or more LOPs taken at exactly the same time
- B. A position derived solely from course, speed, and elapsed time
- ✓ A fix obtained by advancing an earlier LOP along the DR track to the time of a later observationCorrect
- D. A fix obtained by radar range and bearing to a single target
Why C is correct
A running fix is used when simultaneous LOPs are not available. 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