When approaching a red buoy with a green band, what should a vessel do?

Passing a red buoy with a green band on the starboard side is the correct action because it indicates that the buoy is part of a lateral navigation system. In this system, red buoys typically denote the left side of a channel when entering from seaward, while green buoys indicate the right side. However, a buoy with a red color and a green band often serves as a mark indicating a safe passage or a cautionary note within a waterway.

When navigating such a buoy, the vessel should treat the buoy according to its color coding, meaning it should keep the red portion on its starboard (right) side while passing. This adhering to the IALA system (International Association of Lighthouse Authorities) ensures safety and proper navigation, helping prevent any potential collisions or grounding as the vessel makes its way along the channel.

Thus, passing the buoy on the starboard side maintains proper alignment with maritime navigation standards while ensuring that the vessel is navigating correctly and safely through the waterway.