What does this chart symbol, a cross with four dots, show?
A chart symbol: an upright cross with a dot in each of its four corners. Depth figures of 4 to 8 metres are printed around it.
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A rock awash at the level of chart datum. A cross with a dot in each corner is a rock awash at chart datum: its top is level with chart datum, so it is just at the surface at the very lowest tides and covered whenever the tide is higher. A plain cross is a rock that stays underwater, and a star shape is a rock that covers and uncovers.