USCG Exam PracticeEstimated position from current set & drift
On a chart plot, the course line is labelled 'C 045' above the line and 'S 10' below the line. What do these labels represent?
- A. C 045 is the compass course; S 10 is the set of the current
- ✓ C 045 is the true course steered; S 10 is the vessel's speed in knotsCorrect
- C. C 045 is the course made good; S 10 is the drift of the current
- D. C 045 is the magnetic course; S 10 is the distance run in miles
Why B is correct
Bowditch Ch. 8 §802 specifies that the course line carries the true course labeled as 'C' above the line and the speed labeled as 'S' below the line. These labels refer to course steered (true) and speed through the water, not current parameters.
Cited:Bowditch Ch. 8 §802