When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — semidiurnal
In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called', the verified fact is: 'semidiurnal'.
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