What is the purpose of can buoys?

Can buoys are used primarily to mark the port side of a channel when entering from the open water. In the context of navigation, port refers to the left-hand side of a vessel when facing forward. According to the standard navigation rules, can buoys are typically green in color and are cylindrical in shape, which helps mariners easily identify them and ensure they are following the correct course. The presence of can buoys indicates to boaters that they should keep these markers on their left side while navigating into a harbor or channel.

Options that suggest can buoys mark the starboard side or indicate safe passage in reverse do not align with the established conventions of navigational aids. Similarly, the option indicating that can buoys signal for different weather conditions does not relate to the functionality of these buoys. Therefore, recognizing can buoys as markers for the port side forms an essential part of safe boating practices.