What is the physical description of a Can buoy?

• A. Conical, red, starboard side
• B. Yellow, marks features or zones
• C. Cylindrical, green, port side
• D. Red/white vertical stripes, mid-channel

Answer: (C)

In this navigation system, the Can buoy is the green, cylindrical marker that marks the port (left) side of the channel. Its cylindrical shape and green color tell you to keep it on your left as you head toward safe water, which helps you stay in the correct side of the channel. This contrasts with a Nun buoy, which is red and cone-shaped and marks the starboard (right) side. Yellow markers indicate features or zones, not the main channel boundary, and red/white striped markers serve other marker types, not the Can buoy.