Finnish transport vessel Wilhelm Carpelan Wilhelm Carpelan is a former " Von Fersen " - class transport boat currently in private ownership . Built in 1915 for the Imperial Russian Navy , she was used as a transport boat and later a minesweeper by the Finnish Navy until 1977 . After decommissioning , she has been used as a private pleasure boat . Description . As a transport boat , " Wilhelm Carpelan " had a length of , beam of , draft of , and displacement of about 20 tons . Initially equipped with a petrol engine that gave her a speed of about , she was later fitted with a more powerful engine that increased her speed to about . The vessel , crewed by two non - commissioned officer s and two seamen , could carry about 4 – 5 tons of cargo or 40 – 50 passengers in the small cabin and open aftdeck . Later her aftship was covered and she was fitted with an enclosed pilothouse . She was armed with one machine gun . History . Finnish Navy . " Wilhelm Carpelan " was one of the four transport boats built by Kone - ja Siltarakennus Oy in Helsinki in 1915 for the Imperial Russian Navy . Initially built under the name " S1 Shrapnell " , she was seized by the newly founded Finnish Navy and renamed after Wilhelm Carpelan . The other boats of the class were " Augustin Ehrensvärd " , " Axel von Fersen " , and " Fabian Wrede " . The " Von Fersen " - class transport boats were sometimes referred to as the " Ehrensvärd " class . " Wilhelm Carpelan " served as a transport vessel in the Finnish coastal artillery in the Helsinki region before the Second World War . After the war , the vessel was converted into a minesweeper operating in the Gulf of Finland . Afterwards , she was again used as a transport vessel in the coastal artillery . Over the years , the vessel was rebuilt a number of times , and when " Wilhelm Carpelan " was decommissioned and sold in 1977 , there were barely any of the original steel plates left in her hull . Piloting captains have praised the seaworthiness of the small vessels , although they have also been called " submarines " due to their shape and their tendency to have waves crashing over their decks . Passengers were also said to appreciate the stability and safe travel of the vessels . Civilian ownership . On 11 November 1977 , " Wilhelm Carpelan " was sold in Turku to Vilho Suominen , who restored the vessel to its former condition . Since the vessel was sold without an engine , she was fitted with a Valmet 815D diesel engine producing 180 hp . " Wilhelm Carpelan " changed hands again on 30 April 1982 , when she was purchased by animator Antti Peränne from Espoo . The interior of the vessel was then rebuilt and the cabin walls were panelled with palisander acquired from the Swedish steamship " Achilleus " that was being broken up in Hamina . She was also fitted with a hydraulic tilting mast in order to fit under the bridges of Länsiväylä . After rebuilding , she was registered as a pleasure boat and included in the classic ship registry of the Finnish National Board of Antiquities in 1995 . Peränne took great care of his historic vessel , for which he received a grant of 7 , 000 euro from the Finnish National Board of Antiquities in 2011 , until his death in 2012 . For several years , " Wilhelm Carpelan " was usually seen anchored in Keilalahti , Espoo , next to the Nokia head office . In the past , the employees of the office had jokingly referred to the vessel as a spy boat of the Swedish telecommunications company Ericsson . In an online interview , Stephen Elop , the CEO of Nokia , said that when he enquired about the green vessel moored year - round in front of the office , he was told that it was a " Motorola spy ship " . The vessel was moved to the Forum Marinum maritime museum , located by the Aura River in the city of Turku , in the spring of 2013 .