Heligoland Bight

Heligoland Bight is a semi-circular expanse of water which is part of the North Sea, enclosed by the north-western coast of German and the western coast of Denmark. During the First World War a German naval base was located on Heligoland Island and the bight was heavily mined. It was the site of large-scale engagement between British and German naval forces, and remained a focus of smaller scale naval operations for the rest of the war.