Re: Rocks which cover and uncover?
A rock which covers and uncovers, AKA a drying rock, includes its height above chart datum in parentheses and underlined. At a Higher High Water Large Tides it would be covered. At chart datum (what ever standard is used) it would be exposed. It is also shown as a "*" on the chart.
As an American your chart datum is likely Mean Lower Low Water.
Read the chart title block to determine chart datum and heights of land, bridges, etc.
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