chart datum

chart datum
a referenced surface from which soundings or tide heights are calculated, e.g. a tidal datum is the lowest a tide will ever reach (very rarely lower tides are found)

Dictionary of ichthyology. 2009.

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  • CD — • chart datum. • Collateral Duty • compact disc read only memory • Counter Drug • Cut Down, Critical Dimension …   Maritime acronyms and abbreviations

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