Delphin...one of 5 sisters of the Belorussiya class, built from the mid 1970's as ferries. The original names were Kazakhstan, Azerbaizan, Belorussiya, Gruziya and Kareliya.
Kazakhstan ended her days recently as the bankrupt SeaEscape casino ship Island Adventure.
Gruziya is currently Van Gogh.
Belorussiya is Delphin (pictured above).
Kareliya is now Neptune.
Azerbaizan is Enchanted Capri.