USCG Exam PracticePlot true course and distance between two charted points
A navigator plots a course line on a Mercator chart. According to standard labelling conventions, how should the course and speed be marked on that line?
- ✓ Course above the line, speed below the lineCorrect
- B. Speed above the line, course below the line
- C. Both course and speed above the line
- D. Course at the departure end, speed at the arrival end
Why A is correct
The course line is labelled with the true course (e.g., C 090) above the line and the speed (e.g., S 8) below the line. This is the standardised convention described in both chart plotting and DR plotting references. (Bowditch Ch. 4 §406, Bowditch Ch. 8 §802)