Sea Cairns
Coastal cairns called sea marks are also common in the northern latitudes, and are placed along shores and on islands and islets. Usually painted white for improved offshore visibility, they serve as navigation aids. In Scandinavia they are called kummel in Swedish and kummeli in Finnish, and are indicated in navigation charts and maintained as part of the nautical marking system. Inversely, they are used on land as sea cliff warnings in rugged and hilly terrain in the foggy Faroe Islands. In the Canadian Maritimes, cairns have been used as beacons like small lighthouses to guide boats, as depicted in the novel The Shipping News.
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