From Strasbourg city centre: hop on tram C and get off at the station "Esplanade". Then catch bus 30 (direction "Wattwiller"), and get off at the "Danube" bus stop just next to the Vaisseau.
From Kehl : catch bus 21 going to "Jean Jaurès". At the bus stop " Aristide Briand" change for bus 30 going to "Robertsau Sainte-Anne or Chasseurs" and get off at the "Danube" bus stop.
From Strasbourg trainstation: hop on the tram C going to "Neuhof / Reuss" and get off at the station "Winston Churchill."
From Kehl trainstation: at the bus stop "Kehl-Bahnhof" catch bus 21 going to "Jean Jaurès". At the "Aristide Briand" bus stop change for bus 30 going to "Robertsau Sainte Anne or Chasseurs" and get off at the "Danube" bus stop.