The ship was under the hull number 130 on the shipyard Valmet Helsingin Telakka in Helsinki - Katajanokka built for the National Board of Navigation Finland. It was launched in 1953 as Aranda and was used by the Merentutkimuslaitos (Finnish Institute of Marine Research, FIMR) to supply the islands in the archipelago , especially during the winter months . In the summer half year it was used as a research ship. It replaced the previous ship of the same name, which went to the Soviet Union as a reparation payment after the Second World War .
In 1989 it was replaced by a successor building of the same name . The ship was renamed Katarina and is used as a training ship by the seafaring school in Kotka.
Technical specifications
The ship was initially propelled by diesel engines , each of which drove a propeller in the bow and stern area . In 1983 the ship was equipped with a diesel-electric drive . The drive motors were replaced by electric motors; an electric motor with 630 kW power for the front propeller and an electric motor with 855 kW power for the rear propeller. The electricity was generated by generators, which were driven by an eight-cylinder diesel engine from Wärtsilä (type: 8R22HF) with an output of 1,180 kW and a four-cylinder diesel engine from Wärtsilä (type: 4R22HF) with an output of 855 kW.
With the new drive, the ship served as a test platform. A diesel-electric drive was later used in the Otso icebreaker built in the 1980s .
