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Two cones pointing down.
Also known as: South cardinal buoy, Southern cardinal mark
The IALA cardinal mark indicating that the safe water lies to the south of it.
Indicates that the safe water lies to the south of the mark.
Contexts: Navigation
Points both cones downward, the exact inversion of the north mark, so the two are read against each other rather than each on its own.
Contexts: Navigation
A pillar or spar carrying two cone topmarks one above the other, both points downward.