USCG Exam Practice · Visual piloting — three-bearing fixes, danger bearings
Which statement correctly describes a running fix?
- AIt is obtained from two or more LOPs taken at exactly the same instant
- BIt is obtained by advancing the first LOP along the DR track to the time of the second observation✓ correct
- CIt is more accurate than a fix derived from simultaneous LOPs
- DIt requires bearings to at least three separate charted objects
Why B is correct
Bowditch Ch. 7 §702 states that a running fix is 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 explicitly described as less accurate than a simultaneous fix.
Cited:Bowditch Ch. 7 §702
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