sentences:  The ship joined Stena Line fleet in 1991, originally with the name MS "Stena Britannica".In the late 1970s Effoa and Rederi AB Svea, two of the owners of the Baltic Sea ferry operator Silja Line, made the decision to order two new, large car/passenger ferries for Silja Line's Helsinki–Stockholm service.The ships were designed to be much larger than the ships that were at the time sailing on the route (built in 1975) and they would be Silja Line's first genuine cruiseferries.