The Captain of the Port has closed a section of the harbor and buoyed it. These buoys would be painted?

In this scenario, the Captain of the Port has closed a section of the harbor for safety or navigational reasons and marked it accordingly. The appropriate choice for buoys marking such areas is solid yellow. Yellow buoys are internationally recognized as daymarks for caution. They indicate special areas such as exclusion zones, and their use serves to warn mariners of a navigational hazard or restricted area.

The use of solid yellow buoys is standard as they are easily distinguishable from the color schemes used for lateral aids to navigation, which are typically red and green. This distinction helps ensure that mariners recognize the significance of the yellow buoys promptly and take necessary precautions. In contrast, other buoy colors like red and green are reserved for lateral navigation, and horizontally-striped patterns generally apply to junction or special purpose markers, not restricted areas.