USCG Exam PracticeRunning fix from a single object
When advancing the first LOP to obtain a running fix, the navigator moves that LOP in which direction and by which amount?
- A. Perpendicular to the original bearing line, by the distance run
- ✓ Along the DR track, by the distance run between the two observationsCorrect
- C. Along the original bearing line, by the vessel's speed over ground
- D. Parallel to the vessel's heading, by the elapsed time between observations
Why B is correct
Bowditch Ch. 7 §702 states the first LOP is advanced along the DR track to the time of the second observation. The LOP is moved parallel to itself in the direction of the DR track by the distance run in the interval between the two observations.
Cited:Bowditch Ch. 7 §702