Chart Navigation & Plotting · Plotting Conventions
By convention, a course (direction) is labeled above the track line with the prefix 'C' and speed below it with 'S'. A fix is labeled with:
- AA circle around the dot and the time written horizontally✓ Correct
- BA square and the latitude
- CA triangle and the depth
- DNo label at all
Explanation
Standard plotting symbology: a fix is a dot inside a circle with the time written horizontally; a DR is a dot with a half-circle and time at an angle; an EP is a dot inside a square. Courses are labeled above the line, speeds below.
Authority: Bowditch, American Practical Navigator (Pub. 9), plotting symbols
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