Wikipedia
Köln-Düsseldorfer
Köln-Düsseldorfer (KD) is a river cruise operator based in Cologne, Germany. The company operates a total of 14 cruise ships on the Rhine, Main and Moselle rivers.
The famous KD steamer line operated on the Rhine both with connecting steamers and tourist boats. The Lorelei rock was a famed day outing for pleasure seekers.