UC3 Nautilus explained

UC3 Nautilus was a privately built Danish midget submarine. It was built over a three-year period by Peter Madsen and a group of volunteers, and cost approximately US$200,000 to build (1.5 million DKK). The submarine was Madsen's third submarine design.[1]

On 11 August 2017, Nautilus sank in the bay of Køge, in what investigators determined was a deliberate act by Madsen.[2] [3] The following day, Danish police had the submarine salvaged and brought onto land as part of the investigation of the death of Swedish journalist Kim Wall, who was last seen alive on board.[4] As part of the conviction of Madsen for Wall's murder, the submarine was confiscated and later destroyed by the authorities.[5] [6]

Launch

On the day of its launch on 3 May 2008, UC3 Nautilus displaced only 32 tons and was still incomplete. It was named at a well-attended ceremony on the west side of Refshaleøen and towed to the floating installation art barge Illutron (formerly M/S Half Machine) in the Kongens Enghave, where further outfitting and installation of equipment took place over the next several months. By August 2008, Nautilus could sail on its own, as the main diesel engine drive train and steering was completed. On its maiden voyage, the submarine was driven by former crewmen of the now-defunct[7] Royal Danish Navy submarine division.[8] The objective was to sail Nautilus and evaluate her maneuverability, and the appraisal was favourable. In October 2008, Nautilus was submerged for the first time.[8]

Specifications

Nautilus could be crewed by up to eight people for surface operation and four when diving. The submarine moved at five to six knots, depending on conditions and whether it was submerged. It had two 1500L tanks for fresh water and fuel. Trim was carried out normally with an electric pump, or with compressed air as fall-back if the trim-pump fails. The main ballast tanks of 8000L were filled and emptied with compressed air and could flush up to 400L of water in/out per second. It could descend to periscope depth in approximately 20 seconds.[8] The boat had a design crush depth of 400-, and had dived to about 100m (300feet).

There were 16 portholes (8 on each side, 2 oversized) for direct observation. The periscope had five video cameras, providing 360-degree panoramic vision on video screens in the forward control room. The engine room had two diesel engines, one of which was for direct propulsion. The other drove a three-phase electric generator providing power for the onboard air compressor and battery charger. There were more than a tonne of large 12-volt batteries on board, supplying the DC electric motor which could be operated alone or in tandem with the main engine on a chain-coupled drive for turning the 80 kilogram, five-bladed brass propeller. Joystick-controlled electric servos operated the rudder (aft) and hydroplanes (front).

Nautilus was much smaller than the Danish Kobben-class submarine at about two fifths the length, two fifths the width, and running at just above one third the speed. In early 2009, an automatic snorkel system was installed so that the submarine could sail submerged on diesel power, and in August it sailed out from Køge submerged.[8]

The submarine could be operated by a single person from the control room. All controls and indicators were accessible from the captain's seat for controlling buoyancy, pumps, engines, air pressure, communication, video, and other electric systems. As of July 2010, the engine crew still needed to perform manual changeover from surface to dive-ready configuration, involving setting valves correctly for the snorkel and diesel engine exhaust. Nautilus could function on her diesel engine for up to eight minutes underwater without her snorkel. The engine required a steady supply of air to operate, unlike the electric motor, and using it while submerged dropped the air pressure to the equivalent of 3000m (10,000feet) above sea level, as the engine ingested air from the crew compartment unless the snorkel was used.[8]

Missions

On a 2009 trip around Refshaleøen, Nautilus was visited by a group of submarine fans from Subsim. Video game developers from Ubisoft were also on board to find inspiration for their submarine game, Silent Hunter 5.[8]

Nautilus was used by her builders and various others for recreation and expeditions.[8] One such expedition was the attempted launch of the rocket and spacecraft HEAT 1X Tycho Brahe, built by Madsen's non-profit organization Copenhagen Suborbitals. On Tuesday 31 August 2010, the submarine pushed the launch platform Sputnik, carrying the craft from Copenhagen towards the launch site near Nexø, Bornholm.[9]

In January 2011, Nautilus returned to Refshaleøen to be taken on shore for upgrades, then expected to last several months.[10] On 28 April 2017, Nautilus was launched again following repairs and upgrades.[11]

Sinking in 2017

See also: Murder of Kim Wall. On 10 August 2017, Nautilus was scheduled to sail from Copenhagen to appear in the afternoon at an exhibit on Bornholm, but Madsen sent a text notifying the crew that the trip had been cancelled.[12] [13] [14] Nautilus left Refshaleøen around 19:00 with Madsen and Swedish journalist Kim Wall aboard.[15] [16]

Nautilus was reported missing early the following morning. Danish police visited a crew member to establish who was on board, and a large search operation was launched using helicopters and ships in the port of Øresund, just outside the harbour of Copenhagen.[17] At 11:00, it sank and Madsen was rescued by a private boat. Danish police charged him with murder, suspecting him of scuttling Nautilus to destroy evidence.[15] [18] [19] [20]

The following day, Danish police had the submarine salvaged, brought onto land and began processing it for evidence. In April 2018, Madsen was convicted of Wall's murder.[21]

Destruction

As part of the conviction, the ownership of the submarine and all its content was transferred to the Danish State.[5] [22] It was destroyed by authorities.[5] [6]

External links

Notes and References

  1. Web site: Klar til dykning . Ready for diving . . 6 July 2010 . da . 2008-05-03 . 6 August 2012 . https://web.archive.org/web/20120806150726/http://www.b.dk/danmark/klar-til-dykning . live .
  2. Web site: Ubåden "UC3 Nautilus" er sunket: Passagererne er kommet i land og er i god behold . . 11 August 2017 . da . 2017-08-11 . 9 November 2020 . https://web.archive.org/web/20201109212817/https://www.berlingske.dk/samfund/ubaaden-uc3-nautilus-er-sunket-ejeren-er-kommet-i-land-og-er-i-god-behold . live .
  3. News: Submarine in missing journalist case sunk on purpose, Danish police say . . 23 August 2017 . en . 2017-08-13 . Slawson . Nicola . Brown . Mark . 22 August 2017 . https://web.archive.org/web/20170822142401/https://www.theguardian.com/global/2017/aug/13/submarine-maker-held-as-search-for-kim-wall-continues . live .
  4. News: Kranskib hæver sunket ubåd op til overfladen . . Anders Holm . Nielsen . 12 August 2017 . 12 August 2017 . da . Crane ship brings sunken submarine back to the surface . 12 August 2017 . https://web.archive.org/web/20170812214044/http://www.dr.dk/nyheder/indland/kranskib-haever-sunket-ubaad-op-til-overfladen . live .
  5. Web site: Efter livstid til Peter Madsen: Ubåden konfiskeres . . 25 April 2018 . 25 April 2018 . da . After life imprisonment to Peter Madsen: The submarine has been confiscated . 25 April 2018 . https://web.archive.org/web/20180425152837/https://nordjyske.dk/nyheder/efter-livstid-til-peter-madsen-ubaaden-konfiskeres/4b5aa5db-a148-4607-b76d-6b3aac51980c . live .
  6. Web site: Peter Madsens ubåd er blevet destrueret. 22 December 2018. dr.dk. da-DK. Peter Madsen's submarine has been destroyed. 22 December 2018. 22 December 2018. https://web.archive.org/web/20181222111445/https://www.dr.dk/nyheder/indland/peter-madsens-ubad-er-blevet-destrueret. live.
  7. Web site: Tumleren Class Submarines (1989–2004) . Danish Naval History . 6 July 2010 . 26 August 2010 . https://web.archive.org/web/20100826093129/http://www.navalhistory.dk/English/TheShips/Classes/Tumleren_Class(1989).htm . live .
  8. Web site: Nyt om undervandsbåden Nautilus . News about the submarine Nautilus . . 6 July 2010 . da . dead . https://web.archive.org/web/20100903172102/http://ing.dk/artikel/106379-nyt-om-undervandsbaaden-nautilus . 3 September 2010 . dmy-all.
  9. News: Mette Buck . Jensen . Nyt fra raket-holdet: Vi når Nexø kl. 20.30 . . News from the rocket-team: We will reach Nexø at 20.30 . da . 1 September 2010 . dead . https://web.archive.org/web/20100903235244/http://ing.dk/artikel/111523-nyt-fra-raket-holdet-vi-naar-nexoe-kl-2030 . 3 September 2010 . dmy-all .
  10. News: K.V. . Bengtson. P. . Madsen . En sten fra mit hjerte – vi er hjemme igen . . da . 20 January 2011 . dead . https://web.archive.org/web/20110122085957/http://ing.dk/artikel/115824-en-sten-fra-mit-hjerte-vi-er-hjemme-igen . 22 January 2011 . dmy-all .
  11. Web site: UC3 Nautilus . 2017-08-14 . dead . https://web.archive.org/web/20170814191413/http://rml.space/projects/submarines/uc3-nautilus . 14 August 2017 . rml.space . dmy-all .
  12. News: Peter Madsen aflyste torsdag aften planlagt ubådstur over sms . . Emilie Holt . Vissing . 12 August 2017 . 12 August 2017 . da . Peter Madsen texts cancellation of planned submarine trip Thursday evening . 13 August 2017 . https://web.archive.org/web/20170813212519/http://jyllands-posten.dk/indland/ECE9783173/peter-madsen-aflyste-torsdag-aften-planlagt-ubaadstur-over-sms/ . live .
  13. News: Drabssigtet ubådskaptajn sendte mystisk SMS til sin besætning . . Marianne . Fajstrup . 12 August 2017 . 12 August 2017 . da . Submarine captain charged with homicide sent mysterious text to his crew . 12 August 2017 . https://web.archive.org/web/20170812140717/https://www.b.dk/nationalt/drabssigtet-ubaadskaptajn-sendte-mystisk-sms-til-sin-besaetning . live .
  14. News: Ven til drabssigtet ubådsejer: Der er intet suspekt ved SMS'er . b.dk . 12 August 2017 . 12 August 2017 . da . Friend of homicide charged submarine owner: Nothing suspicious about texts . 12 August 2017 . https://web.archive.org/web/20170812172213/https://www.b.dk/nationalt/ven-til-drabssigtet-ubaadsejer-der-er-intet-suspekt-ved-smser . live .
  15. Web site: Drabssigtelse i sag om ubåd . Copenhagen Police . . 11 August 2017 . 12 August 2017 . da . Homicide charge in submarine case . https://web.archive.org/web/20170811222703/http://www.mynewsdesk.com/dk/koebenhavns-politi/pressreleases/drabssigtelse-i-sag-om-ubaad-2105443 . 11 August 2017 . dead . dmy-all .
  16. News: Danish submarine owner arrested over missing journalist. 13 August 2017. BBC. 12 August 2017. 12 August 2017. https://web.archive.org/web/20170812215634/http://www.bbc.com/news/world-europe-40909469. live.
  17. News: Forsvaret leder efter privat ubåd: Frygter den er sunket i Øresund . . M.Ø. . Christensen . 11 August 2017 . da . The Defence is looking for private submarine: Fear that it has sunken in Øresund . 11 August 2017 . 11 August 2017 . https://web.archive.org/web/20170811113958/http://www.dr.dk/nyheder/indland/forsvaret-leder-efter-privat-ubaad-frygter-den-er-sunket-i-oeresund . live .
  18. News: Kim Wall: Danish submarine was 'deliberately sunk' . . 13 August 2017 . 13 August 2017 . 24 August 2017 . https://web.archive.org/web/20170824034750/http://www.bbc.com/news/world-europe-40916787 . live .
  19. News: Svensk journalist forsvundet: Ubådsejer sigtet for drab . . 11 August 2017 . 12 August 2017 . da . Swedish journalist disappeared: Submarine owner charged with homicide . 11 August 2017 . https://web.archive.org/web/20170811211954/http://ekstrabladet.dk/112/svensk-journalist-forsvundet-ubaadsejer-sigtet-for-drab/6775425 . live .
  20. News: Submarine Builder Arrested On Suspicion Of Killing Journalist After Vessel Sinks . . Claudia . Koerner . 12 August 2017 . 12 August 2017 . 12 August 2017 . https://web.archive.org/web/20170812200516/https://www.buzzfeed.com/claudiakoerner/submarine-builder-arrested-on-suspicion-of-killing . live .
  21. Web site: Peter Madsen sentenced to life for murdering journalist Kim Wall. Orange. Richard. 25 April 2018. the Guardian. en. 25 April 2018. 27 April 2018. https://web.archive.org/web/20180427094240/https://www.theguardian.com/world/2018/apr/25/peter-madsen-sentenced-life-murdering-kim-wall-submarine. live.
  22. Web site: Dom i ubådssag . Københavns Byret, Danmarks Domstole . 25 April 2018 . 1 May 2018 . da . Conviction in the submarine case . 26 April 2018 . https://web.archive.org/web/20180426075738/http://www.domstol.dk/KobenhavnsByret/nyheder/domsresumeer/Pages/Domiub%C3%A5dssag.aspx . live .

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