MS Stena Saga is a cruiseferry owned by the Swedish shipping company Stena Line and operated mainly on their route connecting Oslo to Frederikshavn, Denmark. Every Monday morning she also sails between Göteborg, Sweden and Frederikshavn, Denmark. She was built as MS Silvia Regina in 1981 by Wärtsilä Turku, Finland for Rederi AB Svea for use in Silja Line traffic. The ship joined Stena Line fleet in 1991, originally with the name MS Stena Britannica.
Stena Line is one of the world"s largest ferry operators and the largest privately owned shipping company in the world. With services serving Denmark, England, Germany, Ireland, Latvia, the Netherlands, Northern Ireland, Norway, Poland, Scotland, Sweden and Wales, Stena Line is a major unit of Stena AB, itself a part of the Stena Sphere. Stena Line also owns the Swedish vessels of the otherwise German- and Danish-owned Scandlines.