USCG Exam Practice · Running fix from a single object
When advancing a first LOP to obtain a running fix, the navigator advances it along which reference?
- AThe magnetic heading of the vessel
- BA line parallel to the nearest charted depth contour
- CThe DR track✓ correct
- DThe true bearing to the observed object
Why C is correct
The first LOP is advanced along the DR track to the time of the second observation. The DR track represents the vessel's assumed course and speed made good between the two observations. (Bowditch Ch. 7 §702)
Cited:Bowditch Ch. 7 §702
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