Coastal Defense Battery No. 7 ("American Battery")
Fortification

The so-called “American Battery” with 9.2-inch guns is located at the western end of the island, about 200 m from the shore. It was originally intended for 130 mm guns, but was later equipped with guns supplied from the United States. They were operated by electricity, ammunition was delivered by elevators. The command post was combined with a power plant and ammunition storage. In 1918, three positions were blown up, but one remained intact.