Navigation General · Inland Marks
On U.S. waters, a white buoy with an orange diamond and the word 'ROCK' is a(n):
- ALateral mark
- BInformation and regulatory mark warning of a danger✓ Correct
- CSafe water mark
- DAnchorage mark
Explanation
Information and regulatory marks are white with orange shapes: an orange diamond warns of danger, a diamond with a cross means an exclusion area, a circle gives operating restrictions (e.g., speed), and a square/rectangle gives information. The wording specifies the hazard.
Authority: USCG Aids to Navigation; 33 CFR
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