MS Bluefort was an accommodation vessel owned by the Canadian-based company Bridgemans Services Group LP. She was built in 1979 as a car/passenger ferry by Meyer Werft, Papenburg, Germany as Diana II av Slite for Rederi AB Slite for use in Viking Line's traffic. She has also sailed under the names Diana II, Vironia, Mare Balticum, Meloodia and ARV 1. Background. Tonnage war in the Baltic. Rederi AB Slite had great success with their first generation of car and passenger ferries servicing between Sweden and Finland and by the late 1970s the growing market demanded larger ships.
https://en.wikipedia.org/wiki/MS_Bluefort