You are sailing south on the Intracoastal Waterway (ICW) when you sight a green can buoy with a yellow square painted on it. Which of the following is TRUE?

Correct Answer: Option C — You should leave the buoy to port.

In the Intracoastal Waterway, yellow symbols on buoys indicate they are part of the ICW system. A yellow square on a green buoy signifies that the buoy should be kept to the port side when traveling south, consistent with the 'red right returning' rule applied to the ICW.