Which cardinal mark buoy indicates the South direction?

The cardinal mark buoy that indicates the South direction is characterized by a yellow top and a black bottom. This distinct coloring scheme is designed to convey navigational information to mariners, signifying that the buoy is positioned in a location where the deep water lies to the south of it.

In maritime navigation, understanding the color codes of cardinal marks is crucial for safe passage. The South buoy, with its yellow top, immediately indicates to a navigator that they are approaching a channel or navigable water that should be kept to their north, guiding their journey on a southern route.

Other options presented provide different color configurations which represent other cardinal points or are not standard navigational markers. For instance, a buoy with a black top and yellow bottom represents the North direction, while configurations featuring black and yellow in various sequences or placements relate to East or West cardinal locations instead. The unique yellow top-black bottom combination is universally recognized for signaling the South cardinal mark.