 After September 1977, the "Svea Corona" served on the Turku–Mariehamn–Stockholm route during the winter season (between September and May) and spent the summer months as a third ship on the Helsinki–Stockholm service.The arrangement lasted until 1981 when larger tonnage was delivered to the Helsinki–Stockholm route, and "Svea Corona" alongside her sister "Bore Star" (which had been renamed "Silja Star" the previous year after a change of ownership) transferred permanently to the Turku–Stockholm service.In 1978, Rederi AB Svea signed a memorandum of agreement to sell "Svea Corona" to DFDS on delivery of the new Helsinki–Stockholm ship, but this agreement was not exercised and DFDS acquired Effoa's "Wellamo" instead.