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96:. In addition to icebreaking, the oblique vessel could also be utilized for oil spill response operations in both open and ice-infested waters by using the flat side to guide the oil to a recovery unit. However, there have also been doubts about the ability of the relatively small vessel to break a wide channel in ice without the much greater displacement and shaft power of a traditional icebreaker.
143:, where production began on 24 April 2012 and keel was laid on 6 July. However, instead of launching the unfinished hull in Kaliningrad and towing it to Helsinki for outfitting, the blocks were transported to Helsinki and the hull was assembled in Finland. The first blocks arrived on a barge on 9 April 2013 and the vessel, which was given the name
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of 23–25 metres (75–82 ft), a practice that was not very efficient and economical. Analysis of
Finnish harbour statistics and icebreaker logbooks showed that with a beam of 20 metres (66 ft), the icebreaker would be wide enough to provide assistance to most merchant ships in need of towing.
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The development of the oblique icebreaker concept began in 1997, when Kværner Masa-Yards Arctic
Technology Centre (MARC) established a project to develop new ways of assisting large tankers in ice conditions. Traditionally, escorting large ships up to 40 metres (130 ft) wide required two
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oblique icebreaker concept developed for AHS, was designed to be capable of breaking level ice up to 1 metre (3.3 ft) thick both ahead and astern, and generate a 50-metre (55 yd) channel in 0.6-metre (2.0 ft) ice when moving sideways using three
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showed that the proposed concept was viable and that the resistance of a large cargo ship was considerably reduced in both level ice as well as frozen brash ice when operating behind the oblique icebreaker. The concept has been patented.
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A rendering of the icebreaking multipurpose emergency and rescue vessel ordered by the
Russian Ministry of Transport, showing the unconventional operating mode of an oblique icebreaker.
149:, was completed in 2014. In 2015, the oblique icebreaker carried out ice trials in the Gulf of Ob where the sideways icebreaking was successfully demonstrated for the first time.
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The larger ships, fewer in number, could then be assisted with an unconventional method. The result was an asymmetrical, triangle-shaped vessel with three
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200:. 15th International Conference on Port and Ocean Engineering under Arctic Conditions, 1999 (POAC'99). Espoo, Finland. pp. 552–560.
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kW. Initially, the hull of the 76.4-metre (251 ft) vessel referred to as "NB508" was to be built by
Shipyard Yantar JSC in
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On 8 December 2011, the
Russian Ministry of Transport ordered an icebreaking multipurpose emergency and rescue vessel from
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39:. In this way, a relatively small icebreaker is capable of opening a wide channel in ice for large merchant ships.
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The Hull
Assembly of an Icebreaking Multipurpose Emergency and Rescue Vessel started at Arctech Helsinki Shipyard
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in the "corners" pushing the icebreaker with a 50-degree angle of attack—almost sideways—in ice.
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designed to operate not only ahead and astern, but also obliquely (sideways) with a large
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The Hull
Assembly of Icebreaking Emergency and Rescue Vessel started in Kaliningrad
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The
Production of Icebreaking Multipurpose Emergency and Rescue Vessel Was Started
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Baltika revolutionary oblique icebreaker demonstrates its operational capability
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and events/Roundtable_May2013/Mustamaki.pdf
Shipbuilding cooperation with Russia
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Over the years, the concept was further developed by MARC and its successor,
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Asymmetric icebreaker that can break ice sideways to open a wide channel
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The oblique icebreaker concept was developed in the late 1990s by
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the
Finnish Funding Agency for Technology and Innovation (Tekes)
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Arpiainen, M.; Bäckström, M.; Suojanen, R.-A. (1999).
50:. The first vessel of this kind was ordered by the
114:(AHS), then a joint venture between the Finnish
54:on 8 December 2011 and was completed in 2014.
367:. Esko Mustamäki, Arctech Helsinki Shipyard.
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322:. Arctech Helsinki Shipyard, 24 April 2012.
352:. Arctech Helsinki Shipyard, 28 June 2013.
247:. Tekniikka & Talous, 30 October 2003.
44:Kværner Masa-Yards Arctic Technology Centre
337:. Arctech Helsinki Shipyard, 6 July 2012.
135:thrusters with a combined output of 7,500
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232:. United States Patent no. 5,996,520.
216:. ABS Surveyor Summer 2005, page 15.
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245:Vino jäänmurtaja kulkee kylki edellä
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230:Icebreaking method and icebreaker
261:Jäät päreiksi, sitten kesätöihin
197:Revolutionary Oblique Icebreaker
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63:conventional icebreakers with a
126:vessel, based on Aker Arctic's
120:United Shipbuilding Corporation
397:. Aker Arctic, 14 April 2015.
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307:. WorkBoat.com, 8 July 2012.
305:Oblique Icebreaker for Russia
228:Arpiainen, M. et al. (1999):
52:Russian Ministry of Transport
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399:Retrieved 2015-04-14.
384:Retrieved 2013-11-10.
380:2013-04-09 Arctech NB-508
369:Retrieved 2013-06-12.
354:Retrieved 2013-07-26.
339:Retrieved 2012-10-04.
324:Retrieved 2012-10-04.
309:Retrieved 2012-10-04.
294:Retrieved 2016-07-21.
272:Retrieved 2012-10-04.
249:Retrieved 2012-10-04.
234:Retrieved 2012-10-04.
218:Retrieved 2012-10-04.
112:Arctech Helsinki Shipyard
214:The Oblique Icebreaker
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259:Kauhanen, E. (2003):
116:STX Finland Cruise Oy
31:is a special type of
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106:Baltika (icebreaker)
141:Yantar, Kaliningrad
48:double acting ships
288:2016-08-18 at the
266:2012-05-11 at the
175:Double acting ship
29:oblique icebreaker
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122:. The 76 million
70:azimuth thrusters
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74:Model tests
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416:Ship types
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182:References
33:icebreaker
286:Archived
264:Archived
153:See also
78:ice tank
146:Baltika
133:Z-drive
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76:in an
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90:ABB
27:An
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