USCG Exam PracticePlot true course and distance between two charted points
A navigator plots a course line on a Mercator chart and labels it correctly per standard DR conventions. Which of the following represents proper labeling?
- A. True course written below the line; speed written above the line
- ✓ True course written above the line as 'C 270'; speed written below as 'S 10'Correct
- C. Magnetic course written above the line; elapsed time written below
- D. True course and speed written together above the line separated by a slash
Why B is correct
Bowditch Ch. 4 §406 and Ch. 8 §802 both establish that the course line is labeled with the true course (e.g., 'C 270') above the line and speed (e.g., 'S 10') below the line. Reversing these labels or using magnetic course does not conform to standard practice.