USCG Exam Practice · Running fix from a single object
A running fix differs from a standard fix primarily because a running fix is obtained when:
- ATwo or more LOPs are taken simultaneously from different objects
- BRadar range and bearing are used together
- CLOPs cannot be taken simultaneously and the first LOP is advanced along the DR track to the time of the second observation✓ correct
- DThe vessel's course is changed between the two observations
Why C 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 and the intersection is the running fix.
Cited:Bowditch Ch. 7 §702
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