Katarina is a Finnish training ship of the Kotka School of Nautical Studies.

In 1949, the Finnish National Board of Navigation ordered an ice-strengthened passenger ship to transport people and cargo to the islands in the Archipelago Sea.

[3] While primarily built as a "winter boat" for the Archipelago Sea communities, but during the summer months she served as a research vessel for the Finnish Institute of Marine Research.

[2] When the third Aranda, a purpose-built research vessel for the Institute of Marine Research, was built in 1989, the old Aranda was renamed Katarina and transferred to the Kotka School of Nautical Studies to serve as a training ship.

[2] Built as an icegoing ship, Katarina was fitted with propellers in both stern and bow.