Nun buoys are marked with what colors and shapes?

Nun buoys are typically used to indicate the right side of a channel when entering from open water. They are characterized by their red markings and cone shape. The color red is important as it aligns with the IALA (International Association of Lighthouse Authorities) buoyage system, which designates red as a color that indicates safe passage on the right side of the channel.

The shape of the nun buoy, being conical, helps boaters easily identify its purpose. This distinction is critical for navigational safety, as understanding buoy markings ensures that vessels can safely navigate waterways without straying into hazards or shallow areas.

The other options do not reflect the characteristics of nun buoys accurately, as each describes different types of buoys with specific meanings or navigational aids. Green markings, for example, are used for lateral buoys that mark the left side of the channel.