The catamaran Twin City Liner is a link on the Danube river between the two capitals, Vienna, Austria and Bratislava, Slovakia since 1 June 2006.
For this and due to the weight, the shipyard of Norwegian Båtservice Mandal developed a high speed catamaran in aluminium with a hydrojet which can also be used in summer at low tide.
To minimize the impact of the waves, complex model tests of the Austrian Institute for Maritime Technology (Schiffbautechnische Versuchsanstalta) took place.
During a press conference on 20 August 2007 the Deputy Mayor for Economic Affairs and Finance Vienna Renate Brauner discussed the acquisition of the second Twin City Liner.
There have been studies conducted for the purchase of a third vessel to develop a fast connection based on the Twin City Liner to Budapest or Belgrade.
It took 62,000 working hours, 25 tons of aluminium, and 60 square meters of window glass to complete the 7 million euro vessel.
The partners are as operators DDSG Blue Danube, belonging to the Wien Holding which includes the businesses run by the city of Vienna.