On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
Official USCG Answer & Rule Citation
Correct Answer: Option B — 5-fathom curve
In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'On charts of U.S. waters, a magenta marking is NOT used for marking a', the verified fact is: '5-fathom curve'.
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