The Sandau Ferry, also known as the Sandau Büttnershof Ferry, is a cable ferry

Cable ferry

A cable ferry is guided and in many cases propelled across a river or other larger body of water by cables connected to both shores. They are also called chain ferries, floating bridges, or punts....

 across the Elbe

Elbe

The Elbe is one of the major rivers of Central Europe. It rises in the Krkonoše Mountains of the northwestern Czech Republic before traversing much of Bohemia , then Germany and flowing into the North Sea at Cuxhaven, 110 km northwest of Hamburg...

 river between Sandau

Sandau

Sandau is a town in the district of Stendal, in Sachsen-Anhalt, Germany. It is situated on the right bank of the Elbe, approx. 5 km south of Havelberg. It is part of the Verbandsgemeinde Elbe-Havel-Land....

 and Büttnershof in Saxony-Anhalt

Saxony-Anhalt

Saxony-Anhalt is a landlocked state of Germany. Its capital is Magdeburg and it is surrounded by the German states of Lower Saxony, Brandenburg, Saxony, and Thuringia.Saxony-Anhalt covers an area of...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

.

Technically, the ferry is a reaction ferry

Reaction ferry

A reaction ferry is a cable ferry that uses the reaction of the current of a river against a fixed tether to propel the vessel across the river...

, which is propelled by the current

Current (stream)

A current, in a river or stream, is the flow of water influenced by gravity as the water moves downhill to reduce its potential energy. The current varies spatially as well as temporally within the stream, dependent upon the flow volume of water, stream gradient, and channel geometrics...

of the water. The ferry is attached to a floating cable which is anchored firmly in the riverbed upstream of the ferry. To operate the ferry, it is angled into the current, causing the force of the current to swing the ferry across the river on the cable.