USCG Exam PracticeChart symbols and abbreviations (Chart No. 1)
On a US nautical chart, what does the small circle associated with a buoy symbol represent?
- A. The swinging radius of the buoy at maximum current.
- ✓ The charted position of the buoy, located at the centre of the circle.Correct
- C. The danger zone surrounding the buoy that vessels must avoid.
- D. The approximate position of the buoy's anchor sinker on the bottom.
Why B is correct
The position symbol for a buoy is a small circle; the precise charted position is the centre of that circle. For lighthouses, a star symbol is used and the centre of the star marks the charted position. (Light List — Position Symbol)