Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?
Official USCG Answer & Rule Citation
Correct Answer: Option C — Type of bottom
In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading', the verified fact is: 'Type of bottom'.
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