General Navigation USCG Question #111 (Set 4)

What is a lighted safe water mark fitted with to aid in its identification?

Official USCG Answer & Rule Citation

Correct Answer: Option C — A spherical topmark

Under IALA Region B (U.S. waters), safe water marks feature red and white vertical stripes, a red spherical topmark, Morse Code 'A' white flashing lights, and are lettered rather than numbered.

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