What does a diamond symbol indicate about a buoy on navigation charts?

What does a diamond symbol indicate about a buoy on navigation charts?

• A. Diamond calls attention to the position of the circle and description of the aid - Nun or Can
• B. It marks a submerged obstruction
• C. It marks a lighthouse
• D. It marks depth contours

Answer: (A)

On navigation charts, a diamond shape is used as a pointer to where you’ll find the detailed description of an aid to navigation and its exact position. That diamond tells you to look at the accompanying notes for this buoy, which specify its physical form—whether it’s a Nun buoy (conical) or a Can buoy (cylindrical). Knowing the buoy’s shape helps you recognize it at sea, since the IALA buoyage system uses these shapes as identifying features. This symbol doesn’t indicate a submerged obstruction, a lighthouse, or depth contours, which have their own distinct chart representations.

On navigation charts, a diamond shape is used as a pointer to where you’ll find the detailed description of an aid to navigation and its exact position. That diamond tells you to look at the accompanying notes for this buoy, which specify its physical form—whether it’s a Nun buoy (conical) or a Can buoy (cylindrical). Knowing the buoy’s shape helps you recognize it at sea, since the IALA buoyage system uses these shapes as identifying features. This symbol doesn’t indicate a submerged obstruction, a lighthouse, or depth contours, which have their own distinct chart representations.