Estimated position on a chart is depicted by which shape?

• A. Circle
• B. Triangle
• C. Square
• D. Hexagon

Answer: (C)

In chart plotting, the symbol used to show a position that is not precisely fixed is a square. This shape communicates uncertainty and that the marked position is an estimate based on the best available information, such as extrapolating from speed and course or combining imperfect bearings. A precise fix from radar or GPS would be shown with a different, more definite mark, so the square clearly signals that this is an estimated position. The other shapes are used for different kinds of marks or fixes on the chart, not to indicate an estimate, which is why the square is the best choice here.