German Bight in the context of "Danish Wadden Sea Islands"

Heligoland (/ˈhɛlɪɡoʊlænd/; German: Helgoland, pronounced [ˈhɛlɡoˌlant] ; Heligolandic Frisian: deät Lun, lit. 'the Land', Mooring Frisian: Hålilönj, Danish: Helgoland) is a small archipelago in the North Sea, administratively part of the German state of Schleswig-Holstein. The islands are located in the Heligoland Bight (part of the German Bight) in the southeastern corner of the North Sea and are the only German islands not in the vicinity of the mainland: they lie approximately 69 kilometres (37+1⁄2 nautical miles) by sea from Cuxhaven at the mouth of the River Elbe.

The islands were historically possessions of Denmark, then became possessions of Great Britain from 1807 to 1890. Since 1890, they have been part of Germany, although after World War II they along with the rest of Schleswig-Holstein were administered by the United Kingdom as part of the British occupation zone in Germany. British control of Heligoland lasted until 1952, when it was turned over to the control of West Germany.

The Frisians (/ˈfriːʒənz/) are an ethnic group indigenous to Northwestern Europe on the coastal regions of northern Netherlands, north-western Germany and southern Denmark. They inhabit an area known as Frisia and are concentrated in the Dutch province of Friesland and, in Germany, East Frisia and North Frisia (which was a part of Denmark until 1864).

The Frisian languages are spoken by more than 500,000 people; West Frisian is officially recognised in the Netherlands (in the Dutch province Friesland) while North Frisian and Saterland Frisian are recognised as regional languages in Germany.

The Wadden Sea National Parks in Denmark, Germany and the Netherlands are located along the German Bight of the North Sea. In Germany and Denmark they also mark the area of the UNESCO World Heritage Site of the Wadden Sea. Divided from each other by administrative borders, they form a single ecological entity. The purpose of the national parks is the protection of the Wadden Sea ecoregion.

The U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies, largely in the seas around the British Isles and in the Mediterranean, as part of a mutual blockade between the German Empire and the United Kingdom.

Both Germany and Britain relied on food and fertilizer imports to feed their populations, and raw materials to supply their war industry. The British Royal Navy was superior in numbers and could operate on most of the world's oceans because of the British Empire, whereas the Imperial German Navy surface fleet was mainly restricted to the German Bight, and used commerce raiders and submarine warfare to operate elsewhere.

Storm tides of the North Sea are coastal floods associated with extratropical cyclones crossing over the North Sea, the severity of which is affected by the shallowness of the sea and the orientation of the shoreline relative to the storm's path, as well as the timing of tides. The water level can rise to more than 5 metres (17 ft) above the normal tide as a result of storm tides.

Northern Germany and Denmark are particularly susceptible to storm tides. The coastline of the German Bight forms an L-shape facing northwest. Also vulnerable are the United Kingdom and the Netherlands, where the sea shallows and is funnelled toward the English Channel.

Düne (German pronunciation: [ˈdyːnə] ; Danish: Dynen; North Frisian: de Halem) is one of two islands in the German Bight that form the Archipelago of Heligoland, the other being Heligoland proper.

The Heligoland Bight, also known as Helgoland Bight, (German: Helgoländer Bucht, pronounced [ˈhɛlɡoˌlɛndɐ ˈbʊxt]) is a bay which forms the southern part of the German Bight, itself a bay of the North Sea, located at the mouth of the Elbe river. The Heligoland Bight extends from the mouth of the Elbe to the islands of Heligoland and lies between the East Frisian island of Wangerooge and the North Frisian peninsula of Eiderstedt.

The bight is named after Heligoland. It was the location of World War I naval battles in 1914 and 1917. In 1939 it also had a World War II aerial battle named after it.