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Here we see the actual rock noted on the inset chart sample. Chart Trainer explains how rock symbols must be interpreted in terms of the present tide height at high water, for example, this rock must be completely underwater since it is represented by an asterisk. Related discussions are on the significance of the green part of the beach as seen in the chart, and so on.
Also shown here are typical annotations. This one shows how the slope of a bluff appears on the chart and in sight. The slope of this bluff is actually flat to the left and right of the part shown in the photograph, as we can tell from the chart.
This is clearly a very good way to learn the significance of various symbols and how they are to be interpreted.
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