Chart Navigation & Plotting · Plotting Conventions — Symbols
Which symbol is used to plot a dead-reckoning position?
- AA square with the time
- BA full circle with a dot and four-digit time
- CA semicircle (half-circle) around the point with the time labeled✓ Correct
- DA triangle with the time
Explanation
A DR position is marked with a semicircle and the time; a fix is a circle (or dot with a circle) with the time; an estimated position is a square. Consistent symbology lets any navigator read the plot at a glance.
Authority: Bowditch (Pub. No. 9), plotting symbols
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