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Cardinal mark
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==Gallery== <gallery> Image:Knoll-North-Cardinal-Canthusus.JPG|Knoll North Cardinal Image:Stavros_S_Niarchos.jpg|The 'East Bramble' East Cardinal Mark helps the ''Stavros S Niarchos'' navigate safely in the Solent, August 2008 Image:4 cardinals.jpg|All four types of cardinal mark used in Nanaimo Harbour to warn of an old concrete base. Image:Cardinal mark (east) in ice in front of South Harbor Helsinki Finland.jpg|A light buoying cardinal mark (east) in pressure of ice in front of Helsinki, Finland in winter. Notice that topmark is not used on a buoy that is subjected to ripping by movements of ice. File:South cardinal buoy off St Mawes (4950686323).jpg | A south cardinal mark buoy off St Mawes, UK </gallery>
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