Corsica Ferries, Sardinia Ferries and Elba Ferries are all one company, and vessels are interchanged between fleets regularly, usually with name changes to match the route. The first Corsica Ferries vessel was the Corsica Express, originally the 1937 DFDS ferry Kronprins Olav, acquired and converted in 1967. A 1969 timetable shows her on a daily route from Livorno (Italy) to Portoferraio (Elba) and Bastia (Corsica). She was sold in 1975 to Lauro, and was not scrapped until 1986.
http://www.corsicaferries.com/
Current ferries are MegaExpress, MegaExpress 2 and MegaExpress 3