In 2015, Swedish diving group Ocean X Team found the wreck of a foreign mini-submarine off the east coast of Sweden.
On 27 July 2015, it was reported that a foreign mini-submarine, 20 m (66 ft) long and 3 m (9.8 ft) in diameter, had been located the previous week by Swedish diving group Ocean X Team, led by Dennis Åberg. The submarine was found 2.75 km (1.48 nmi; 1.71 mi) offshore on the east coast of central Sweden. The group had received coordinates for where to search from Icelandic company Ixplorer.
According to the divers who found the submarine, it was a modern model and it appeared to be intact, suggesting that the remains of the crew may still be onboard. The hull was marked with Cyrillic letters. The pictures from the wreck showed that the yellow submarine was standing on the sea bottom with its tower pointing straight up. The diving group informed the Swedish armed forces on Monday 27 July 2015, and video material from the wreckage was handed over for analysis.
On 28 July 2015, a statement was released by the Swedish armed forces public relations office that stated that analysis of the video footage and other evidence indicated that the wreck was "most likely" that of the Imperial Russian Navy Som-class submarine Som (Сомъ), lost with all hands on active service in 1916. According to several sources who previously worked with submarine analyses for the Swedish armed forces, the location of the submarine had been known for at least one year. The submarine sank after a collision with the steamship Ångermanland in the Sea of Åland, somewhere between Arholma and the Svartklubben lighthouse.
As of 28 July 2015[update], the Swedish armed forces considered the wreck to be of historical or marine archaeological interest rather than military, and handed over the case to the Ministry for Foreign Affairs. The ministry consequently informed the Russian embassy in Stockholm.
Ocean X Team
The Ocean X diving group is a privately owned salvage operator not affiliated with the Swedish military. It previously found an American Boeing B-17 Flying Fortress in 1992, and 2,400 bottles of 1907 champagne in 1994.
The wreck was discovered by using an ROV (remote operated vehicle) called V8 Sii from Ocean Modules in Åtvidaberg. The ROV was equipped with a grapple, a video camera and a Blueview sonar made by Teledyne.
- Hägg, Marie; Sjöqvist, Hanna Aler (27 July 2015). "Okänd ubåt hittad i svenskt vatten". Unknown submarine found in Swedish waters. Sveriges Television. http://www.svt.se/nyheter/inrikes/okand-ubat-hittad-i-svenskt-vatten. Retrieved 27 July 2015.
- Stjernberg, Max Sohl. "Främmande ubåt hittad i svenskt vatten". Foreign submarine found in Swedish waters. Expressen. http://www.expressen.se/nyheter/frammande-ubat-hittad-i-svenskt-vatten/. Retrieved 27 July 2015.
- Habul, Kenan; Hagberg, Sebastian (27 July 2015). "Främmande ubåt hittad i svenskt vatten". Foreign submarine found in Swedish waters. Aftonbladet. http://www.aftonbladet.se/nyheter/article21177742.ab. Retrieved 27 July 2015.
- Svensson, Frida; Lidholm, Per. "Ubåtsvraket kan vara från 1916". The submarine wreck can be from 1916. Svenska Dagbladet. http://www.svd.se/frammande-ubat-hittad-i-svenskt-vatten. Retrieved 27 July 2015.
- von Schultz, Charlotta (28 July 2015). "Svenska tekniken som hittade ubåten". Swedish technology found the submarine. Ny Teknik. http://www.nyteknik.se/nyheter/article3920621.ece. Retrieved 28 July 2015.
- Lenken, Victor. "Främmande ubåt hittad i Östersjön". Foreign submarine found in the Baltic Sea. Göteborgs-Posten. https://www.gp.se/nyheter/sverige/1.2786965-frammande-ubat-hittad-i-ostersjon. Retrieved 27 July 2015.
- "Ubåt från 1916 funnen i svenska vatten" (in Swedish). Submarine from 1916 found in Swedish waters. Swedish Armed Forces. http://www.forsvarsmakten.se/sv/aktuellt/2015/07/ubat-fran-1916-funnen-i-svenska-vatten/. Retrieved 28 July 2015.
- Svahn, Clas (27 July 2015). "Ubåtsfyndet sannolikt från 1916" (in Swedish). Submarine discovery likely from 1916. Stockholm. http://www.dn.se/nyheter/sverige/ubatsfyndet-sannolikt-fran-1916/. Retrieved 30 July 2015.
- Eriksson, Gustaf (28 July 2015). "Bekräftat: Fyndet är den ryska Catfish-ubåten". Confirmed: The find is the Russian Catfish submarine. Aftonbladet. http://www.aftonbladet.se/nyheter/article21180697.ab. Retrieved 29 July 2015.
- "About X-team". Ocean X team. http://www.oceanexplorer.se/about-x-team/. Retrieved 27 July 2015.
- Frederick, Tim (18 June 2012). "Massive Unidentified Underwater Object Stumps Treasure Diving Crew: Crashed UFO or Elaborate Hoax?". iTech Post. http://www.itechpost.com/articles/2828/20120618/ufo-ocean-x-team-baltic-sea-jonkoping.htm. Retrieved 27 July 2015.
- The divers' video of the find – The Guardian
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