What light color is used for a South Cardinal Mark?

The light color associated with a South Cardinal Mark is white. South Cardinal Marks are used to indicate the safe passage to the south of the mark, often placed in areas where navigational hazards are present. The white light emitted from these buoys is important for mariners as it signifies the direction that should be taken to avoid danger.

In practice, the South Cardinal Mark typically displays a pattern of light that includes a fixed white light or a flashing white light, further differentiating it from other types of cardinal marks that use different colors. The distinct feature of using white light helps in maintaining a consistent signal for navigation, especially at night, ensuring that vessels can clearly identify the mark and its designated safe passageway.