Bay of Kiel in the context of "Great Belt"

Kiel (/kiːl/ KEEL; German: [kiːl] ) is the capital and most populous city in the northern German state of Schleswig-Holstein. With a population of around 250,000, it is Germany's largest city on the Baltic Sea. It is located on the Kieler Förde inlet of the Bay of Kiel and lies in the southeast of the Jutland Peninsula, on the mouth of the Schwentine River, approximately 90 kilometres (56 mi) northeast of Hamburg. The world's busiest artificial waterway, the Kiel Canal, has a terminus in Kiel's Holtenau district. This canal connects the Baltic to the North Sea, with its other end in Brunsbüttel. Most of Kiel is part of Holstein. The boroughs north of the Schwentine also belong to Wagria, while those north of the Kiel Canal are historically part of Southern Schleswig.

Originally a small settlement, Kiel was granted city rights in 1242. Over the centuries, it developed as an important port and trading hub, particularly due to its strategic location on the Kieler Förde inlet. Kiel became part of the Duchy of Holstein, the northernmost state of the Holy Roman Empire. From 1773 to 1864, it was ruled in personal union by the king of Denmark. In 1864, after the Second Schleswig War, the city was incorporated into the Kingdom of Prussia. During the 20th century, Kiel played a significant role in both World War I and World War II, with its naval significance and shipbuilding industry. Following World War II, it became part of West Germany and later the unified Germany.

Angeln (pronounced [ˈaŋl̩n] ; Danish: Angel) is a peninsula on the Baltic coast of Jutland, in the Bay of Kiel. It forms part of Southern Schleswig, the northernmost region of Germany. The peninsula is bounded on the north by the Flensburg Firth, which separates it from Sundeved and the island of Als in Denmark, and on the south by the Schlei, which separates it from Schwansen. The landscape is hilly, dotted with numerous lakes. The largest towns are Flensburg, Schleswig and Kappeln.

Angeln is notable for being the putative home of the Angles, a Germanic tribe that migrated to Great Britain during the Age of Migrations and founded the kingdoms of Mercia, Northumbria and East Anglia. The Angles would ultimately give their name to England.

The Kieler Förde, also known in English as the Kiel Fjord, is an inlet of the Baltic Sea on the eastern side of Schleswig-Holstein, Germany. Beginning at the Bay of Kiel, it extends inland for about 17 kilometres (11 mi), dividing the Dänischer Wohld from Wagrien. It terminates at the Hörn (de), a sheet of water in the centre of Kiel.

The Kiel Canal, which allows ships to pass between the North and Baltic seas without rounding Jutland, has its eastern terminus on the Kiel Fjord. At its narrowest point, the Friedrichsorter Enge, the fjord is only one kilometre wide. The river Schwentine enters the ford near Kiel-Dietrichsdorf.

Sailing/Yachting is an Olympic sport starting from the Games of the 1st Olympiad (1896 Olympics in Athens, Greece). With the exception of 1904 and the canceled 1916 Summer Olympics, sailing has always been included on the Olympic schedule. The Sailing program of 1972 consisted of a total of six sailing classes (disciplines). For each class seven races were scheduled from 29 August 1972 to 8 September 1972 of the coast of Kiel-Schilksee in the Bay of Kiel. Kiel hosted the Olympic sailing competitions for the second time, having previously done so during the 1936 Summer Olympics. The sailing was done on the triangular type Olympic courses.

Fehmarn Belt (German pronunciation) (Danish: Femern Bælt, former spelling Femer Bælt; Low German: Femernbelt) is a strait connecting the Bay of Kiel and the Bay of Mecklenburg in the western part of the Baltic Sea between the German island of Fehmarn and the Danish island of Lolland. Ferries operated by Scandlines connect Puttgarden and Rødby on the two islands.

The strait features an 18-kilometre-wide (11 mi) wide area with depths of 20–30 metres (66–98 ft). Currents in the strait are weak and mostly dependent on wind.