The Royal Viking Line was a luxury cruise line that operated from 1972 until 1998. The company was the brainchild of Warren Titus and had its headquarters at One Embarcadero Center in San Francisco.

MS Black Watch was a Royal Viking Star-class cruise ship. She was built by Wärtsilä Helsinki Shipyard, Finland for Royal Viking Line as Royal Viking Star, entering service in 1972 as the lines first ship. She has also sailed for Norwegian Cruise Lines as Westward and Royal Cruise Line as Star Odyssey. As of June 18, 2022 she has been beached for scrapping as Odin at Alang, India.