Geography and urban development of Dresden past 60 years has made Dresden the fourth largest urban area in Germany after Berlin, Hamburg, and Cologne. The most important river in Dresden is the Elbe river, the only navigable body of water to flow through the city. There are also a number of tributaries such as the river Weißeritz. The nearest German cities are Chemnitz (80 km to the southwest), Leipzig (100 km to the northwest) and Berlin (200 km to the north). The Czech capital Prague is about 150 km to the south; the Polish city of Wrocław is about 200 km to the east. There are
German frigate Hamburg through the Northeast Atlantic, across the North and Baltic Seas, to Finland and Germany. "Hamburg" later became the flagship of Standing NATO Maritime Group 2, and on 8 June 2015 sailed from Wilhelmshaven for a Mediterranean deployment. She took part in the NATO exercise "Trident Juncture" and in Operation Active Endeavour, returning to Wilhelmshaven on 20 December 2015. German frigate Hamburg Hamburg is a "Sachsen"-class frigate of the German Navy. Built by Howaldtswerke-Deutsche Werft, Kiel, "Hamburg" was the second of the "Sachsen" class to be launched and then commissioned into the German Navy. She is based at Wilhelmshaven, initially as