Märket

Märket ('The Mark', Swedish pronunciation: [ˈmæ̂rːkɛt]) is a 3.3-hectare (8.2-acre) uninhabited skerry in the Baltic Sea shared by Sweden and Finland (in the area of the autonomous region Åland), with a lighthouse as its salient humanmade feature. Märket has been divided between the two countries since the Treaty of Fredrikshamn of 1809 defined the border between Sweden and Grand Duchy of Finland as going through the middle of the island. The Finnish side of the island is part of the Municipality of Hammarland and is the westernmost land point of Finland. The Swedish part of the island is itself divided by two counties of Sweden: Uppsala County (Östhammar Municipality) and Stockholm County (Norrtälje Municipality).

Märket
Märket Island with the unusual international border of 1985.
Geography
LocationBaltic Sea
Coordinates60°18′03″N 019°07′53″E
Area0.03 km2 (0.012 sq mi)
Length0.35 km (0.217 mi)
Width0.15 km (0.093 mi)
Administration
RegionÅland
CountiesUppsala län
Stockholms län
Demographics
Population0
Additional information
Time zone
Märket lighthouse
Märket
Coordinates60.301008°N 19.131432°E / 60.301008; 19.131432
Constructed1885
Constructionstone and cast iron tower
Automated1979
Height14 metres (46 ft)
Shapecylindrical tower on an octagonal basement rising from a 2-story keeper’s house
Markingswhite tower and lantern
Power sourcesolar panel, acetylene, diesel generator, kerosene, wind power 
First lit10 November 1885 
Focal height17 metres (56 ft)
Range8.5 nmi (15.7 km; 9.8 mi) 
CharacteristicFl W 5s.
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