 The Water Police in Hamburg is part of the state police and patrols the rivers Elbe, Alster, and their branches, as well as parts of the coastal region of the North Sea.As of 2009, the Hamburg Water Police had five stations, two of which are not actually in Hamburg.One is located at the mouth of the Elbe river in Cuxhaven, Lower Saxony, and another is a sub-station in Lauenburg, a town in Schleswig-Holstein.