USCG Exam PracticeRunning fix from a single object
A running fix is defined as a fix obtained when lines of position cannot be taken simultaneously. What is done with the first LOP to produce the running fix?
- ✓ It is advanced along the DR track to the time of the second observation.Correct
- B. It is averaged with the second LOP to find the midpoint position.
- C. It is held fixed and the second LOP is retarded to the first observation time.
- D. It is discarded and only the second LOP is used with the DR position.
Why A is correct
The first LOP is advanced along the DR track to the time of the second observation; the intersection of the advanced LOP and the second LOP is the running fix. Bowditch Ch. 7 §702 states this procedure explicitly.
Cited:Bowditch Ch. 7 §702