sentences:  When delivered in December 1972, "Diana" was initially set on a route connecting Naantali in Finland to Kapellskär in Sweden via Mariehamn in the Åland Islands.For the winter seasons 1973–1974, 1974–1975 and 1975–1976, she was transferred to the slightly longer Turku–Mariehamn–Stockholm route, but returned to the shorter route for summer's high season.From 1976 onwards to the end of her service with Viking Line she remained on the Naantali–Kapellskär service.