"Queen Elizabeth 2" was also the last oil-fired passenger steamship to cross the Atlantic in scheduled liner service until she was refitted with a modern diesel powerplant in 1986–87. She undertook regular world cruises during almost 40 years of service, and later operated predominantly as a cruise ship, sailing out of Southampton, England. "Queen Elizabeth 2" had no running mate and never ran a year-round weekly transatlantic express service to New York. She did, however, continue the Cunard tradition of regular scheduled transatlantic crossings every year of her service life.