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Which option best reflects IALA Cardinal Marks?
A
Colour: black with one or more red horizontal bands Topmark: two black spheres (balls) vertically Light: white, group flashing (2) — two flashes Shape: pillar or spar Vessels may pass on any side but should keep clear of the mark itself as the danger is directly below or very close.
B
They are used as fairway, mid channel, or landfall marks.
C
North: cones up, black over yellow, continuous flashing.
D
Special marks indicate a special area or feature referred to in nautical publications.