USCG Exam PracticeEstimated position from current set & drift
A running fix differs from a standard fix primarily because:
- A. It uses only electronic navigational equipment rather than visual bearings
- ✓ It is obtained by advancing an earlier LOP along the DR track to the time of a later observationCorrect
- C. It applies the current vector to the DR position to account for set and drift
- D. It is derived from a single line of position crossed with a depth contour
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. It is less accurate than a fix from simultaneous LOPs.
Cited:Bowditch Ch. 7 §702