The average height of the surface of the sea for all stages of the tide over a 19 year period is called __________.
Official USCG Answer & Rule Citation
Correct Answer: Option C — mean sea level
In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'The average height of the surface of the sea for all stages of the tide over a 19 year period is called', the verified fact is: 'mean sea level'.
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