Dueodde Lighthouse

Dueodde Lighthouse

Dueodde Lighthouse
Denmark
Location	Bornholm Island, Denmark
Coordinates	54°59′31″N 15°04′28″E / 54.991835°N 15.074352°ECoordinates: 54°59′31″N 15°04′28″E / 54.991835°N 15.074352°E
Year first constructed	1960–62
Year first lit	August 1962
Automated	1962
Foundation	Pile foundation
Construction	Concrete
Tower shape	Hexagonal prism tower with double balcony and lantern
Markings / pattern	white tower, blue balcony and grey lantern
Height	47 metres (154 ft)
Focal height	48 metres (157 ft)
Current lens	Fresnel Rotary lens
Range	20 nautical miles (37 km)
Characteristic	Three quick white flashes every 10s
Admiralty number	C2550
NGA number	5732
ARLHS number	DEN-149

The Dueodde Lighthouse (Danish: Dueodde Fyr) is located on the Danish island of Bornholm. It was built during the years 1960–62 and commissioned on 15 August 1962. It is 47 m (154 ft) in height, with a focal height of 48 m (157 ft). It is the nodal point of the southeast coast line, warning ships to keep away from the extreme southern tip of the island. Dueodde Lighthouse is Denmark's tallest lighthouse and one of the most important lighthouses of the Baltic Sea.^[1][2][3]

Geography

Bornholm features varied topography, such as Almindingen, Hammeren, Jons Kapel, Paradisbakkerne, Rytterknægten, and Dueodde.^[4] The lighthouse was built on the western side of Dueodde's sand dunes,^[5] on the island's extreme southern tip.

Construction

The foundation for the tower consisted of 14 m (46 ft) long reinforced concrete piles which involved two harsh winter seasons to complete. Water for the construction was drawn from the Baltic Sea using a 700 m (2,300 ft) long pipe line laid over the hill slope. After the completion of the foundation, the tower construction was taken up and completed speedily using sliding form work procedure to raise the hexagonal shaped cylindrical concrete tower to a height of 45 m (148 ft) without the fixtures.^[1][2][6] Materials used for construction included 300 m³ (11,000 cu ft) of cement concrete and 50 tonnes of reinforcement steel.

Architecture and fittings

The lighthouse is equipped with a Fresnel Rotary lens at a focal height of 48 m. Together with its lantern and double gallery, the tower has a total height of 47 m (154 ft). The Fresnel lens (1886) of the Dueodde Nord lighthouse was transferred to this tower. Electric supply of 1,000 watt is provided by the public utility as the illumination source for the incandescent lamp, which, together with the lens and the height of the burner provides a visual range of about 35 km (22 mi). The lens provides three white flashes every ten seconds.^[1][2][6] There are 197 steps to the top of the tower from where there is a panoramic view, weather permitting, of the sea and the sandy white beaches.^[5] It is the only lighthouse on Bornholm that is open to the public, but at irregular times.^[6][7]

Gallery

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See also

• List of lighthouses and lightvessels in Denmark

References

1. "Dueodde". Dansk Fyrtaarne. Retrieved 22 October 2012.
2. Rowlett, Russ (December 26, 2011). "Lighthouses of Denmark: Bornholm". Chapel Hill, North Carolina: University of North Carolina. Retrieved 23 October 2012.
3. Porter, Darwin; Prince, Danforth; Norum, Roger (2009). Frommer's Scandinavia. Lonely Planet. p. 172. ISBN 9781118090237. Retrieved 22 October 2012.
4. Blangstrup, Johan Christian; Halvorsen, Jens Braage; Fischer, Karl Kristian Emil (1894). Salmonsens store illustrerede konversationsleksikon: en nordisk encyklopædi (in Danish) (Public domain ed.). Brødrene Salmonsen (J. Salmonsen). pp. 400–. Retrieved 23 October 2012.
5. Stone, Andrew (2008). Denmark. Lonely Planet. p. 189. ISBN 9781741046694. Retrieved 23 October 2012.
6. "Lighthouse pages: Lighthouse Hammeren Fyr". Leuchtturmseiten. Retrieved 22 October 2012.
7. Symington, Martin (August 1996). Denmark: Passport's Illustrated Travel Guide. McGraw-Hill Trade. p. 61. ISBN 978-0-8442-4829-5. Retrieved 25 October 2012.