Northeast Passage

The Northeast passage (blue) and an alternative route through the Suez Canal (red)

The Northeast Passage (abbreviated as NEP) is, from the European and northern Atlantic point of view, the shipping route to the Pacific Ocean, along the Arctic Ocean coasts of Norway and Russia.[1][2][3] The western route through the islands of Canada is accordingly called Northwest Passage (NWP).

The NEP traverses (from East to West) the Barents Sea, Kara Sea, Laptev Sea, East Siberian Sea, and Chukchi Sea, and it includes the Northern Sea Route (NSR).[2][3] The Northern Sea Route is a portion of the NEP; it is defined in Russian law and does not include the Barents sea and therefore does not reach the Atlantic Ocean. However, since the NSR has a significant overlap over the majority of the NEP, sometimes the NSR term has been used to refer to the entirety of the Northeast Passage.[2][4][5]

The Northeast Passage is one of several Arctic maritime routes, the others being the Northwest Passage (going along Canada's and Alaska's coasts) and the Transpolar Route (going through the North Pole).[1][2]

The first confirmed complete passage, from west to east, was made by the Finnish explorer Adolf Erik Nordenskiöld, with the ship Vega in 1878–79 (he was forced to wintering just a few days' sailing distance from Bering Strait, due to pack ice).

History

11th to 17th centuries

First edition of the important map of Asia by Abraham Ortelius (1572). Ortelius marks a vast network of waterways across East Asia, advocating his belief that a shipping route existed through China to the Northern Sea and thence, by way of the Northeast Passage, to Europe.

The motivation to navigate the Northeast passage was initially economic. In Russia, the idea of a possible seaway connecting the Atlantic and the Pacific Oceans was first proposed by the diplomat Gerasimov in 1525. However, Russian settlers and traders on the coast of the White Sea, the Pomors, had been exploring parts of the route as early as the 11th century.

During a voyage across the Barents Sea in search of the Northeast Passage in 1553, English explorer Hugh Willoughby thought he saw islands to the north, and islands called Willoughby's Land were shown on maps published by Plancius and Mercator in the 1590s, and they continued to appear on maps by Jan Janssonius and Willem Blaeu into the 1640s.[6]

By the 17th century, traders had established a continuous sea route from Arkhangelsk to the Yamal Peninsula, where they portaged to the Gulf of Ob. This route, known as the Mangazeya seaway, after its eastern terminus, the trade depot of Mangazeya, was an early precursor to the Northern Sea Route.

East of the Yamal, the route north of the Taimyr Peninsula proved impossible or impractical. East of the Taimyr, from the 1630s, Russians began to sail the Arctic coast from the mouth of the Lena River to a point beyond the mouth of the Kolyma River. Both Vitus Bering (in 1728) and James Cook (in 1778) entered the Bering Strait from the south and sailed some distance northwest, but from 1648 (Semyon Dezhnev) to 1879 (Adolf Erik Nordenskiöld) no one is recorded as having sailed eastward between the Kolyma and Bering Strait.

Map drawn in 1601 by Theodore de Bry to describe the ill–fated third voyage of the Dutch explorer William Barentsz in search of the Northeast Passage

The western parts of the passage were explored by northern European countries such as England, the Netherlands, Denmark, and Norway, looking for an alternative seaway to China and India. Although these expeditions failed, new coasts and islands were discovered. The most notable was the 1596 expedition led by Dutch navigator Willem Barentsz, who discovered Spitsbergen and Bear Island, and rounded the north end of Novaya Zemlya.

Fearing English and Dutch penetration into Siberia, Russia closed the Mangazeya seaway in 1619. Pomor activity in Northern Asia declined and most Arctic exploration in the 17th century was carried out by Siberian Cossacks, sailing from one river mouth to another in their Arctic-worthy kochs. In 1648, the most famous of these expeditions, led by Fedot Alekseev and Semyon Dezhnev, sailed east from the mouth of the Kolyma River to the Pacific Ocean, and rounded the Chukchi Peninsula, thus proving that no land connection existed between Asia and North America.

18th and 19th centuries

Eighty years after Dezhnev, in 1728, another Russian explorer, Danish-born Vitus Bering on Svyatoy Gavriil (Saint Gabriel) made a similar voyage in reverse, starting in Kamchatka and going north to the passage that now bears his name; the Bering Strait.[7] It was Bering who named the Diomede Islands, which Dezhnev had vaguely mentioned.

Bering's explorations of 1725–30 were part of a larger scheme of Peter the Great, known as the Great Northern Expedition.

The Second Kamchatka Expedition took place in 1735–42, with two ships, Svyatoy Pyotr and Svyatoy Pavel, the latter commanded by Bering's deputy in the first expedition, Captain Aleksey Chirikov. During the Second Expedition Bering became the first Westerner to sight the coast of northwestern North America, and Chirikov was the first Westerner to land there (a storm had separated the two ships earlier). On his return leg, Bering discovered the Aleutian Islands but fell ill, and Svyatoy Pyotr had to take shelter on an island off Kamchatka, where Bering died (Bering Island).

Independent of Bering and Chirikov, other Russian Imperial Navy parties took part in the Second Great Northern Expedition. One of these, led by Semyon Chelyuskin, in May 1742 reached Cape Chelyuskin, the northernmost point of both the Northeast Passage and the Eurasian continent.

Later expeditions to explore the North East Passage took place in the 1760s (Vasiliy Chichagov), 1785–95 (Joseph Billings and Gavril Sarychev), the 1820s and 1830s (Ferdinand Petrovich Wrangel, Pyotr Fyodorovich Anjou, Count Fyodor Litke and others). The possibility of navigating the length of the passage was proved by the mid-19th century.

However, it was only in 1878-79 that Fenno-Swedish explorer Adolf Erik Nordenskiöld (born in Finland but exiled to Sweden many years before the expedition) made the first complete passage of the Northeast Passage, leading the Vega expedition from west to east. The ship's captain on this expedition was Lieutenant Louis Palander of the Swedish Royal Navy.

One year before Nordenskiöld's voyage, commercial exploitation of a section of the route started with the so-called Kara expeditions, exporting Siberian agricultural produce via the Kara Sea. Of 122 convoys between 1877 and 1919 only 75 succeeded, transporting as little as 55 tons of cargo. From 1911 the Kolyma River steamboats ran from Vladivostok to the Kolyma once a year.

One of the pictures from Jonas Lied's and Nansen's journey to Siberia (2 August to 26 October 1913). Nansen is the tall man in the centre, number 2 from left hand is Loris-Melikov, number 5 partly concealed is Lied, number 10 is Vostrotin. Fridtjof Nansen started his trans-Siberian travel on a freighter from Oslo to Yenisei. The journey went through parts of the Northeast Passage, which was to be opened as a shorter trading connection between Western Europe and the Far East. The photograph depicts the encounter of some of the ship's crew with officers from the Russian barges at the mouth of the Yenisei River.

In 1912, two Russian expeditions set out; Captain Georgy Brusilov and the Brusilov Expedition in the Santa Anna, and Captain Alexander Kuchin with Vladimir Rusanov in the Gerkules; each with a woman on board. Both expeditions were hastily arranged, and both disappeared. The German Arctic Expedition of 1912, led by Herbert Schröder-Stranz, ended disastrously with only 7 of 15 crew members surviving the preliminary expedition to Nordaustlandet.[8][9]

In 1913 Jonas Lied organized a successful expedition through the Kara Sea to Yenisei. Explorer and scientist Fridtjof Nansen and Siberian industrialist Stephan Vostrotin were prominent passengers. Lied had founded The Siberian company with the purpose of exporting and importing goods through the great Siberian rivers and the Kara Sea. The 1913 trip is recorded in Nansen's Through Siberia.[10]

In 1915, a Russian expedition led by Boris Vilkitskiy made the passage from east to west with the icebreakers Taymyr and Vaygach.[11]

Nordenskiöld, Nansen, Amundsen, DeLong, Makarov and others also led expeditions, mainly for scientific and cartographic purposes.

After the Russian Revolution

The introduction of radio, steamboats, and icebreakers made running the Northern Sea Route viable. After the Russian Revolution of 1917, the Soviet Union was isolated from the western powers, which made it imperative to use this route. Besides being the shortest seaway between the western and far eastern USSR, it was the only one that lay completely inside Soviet internal waters and did not impinge on waters of opposing countries.

In 1932, a Soviet expedition led by Professor Otto Yulievich Schmidt was the first to sail all the way from Arkhangelsk to the Bering Strait in the same summer without wintering en route. After trial runs in 1933 and 1934, the Northern Sea Route was officially defined and open and commercial exploitation began in 1935. The next year, part of the Baltic Fleet made the passage to the Pacific where armed conflict with Japan was looming.

A special governing body Glavsevmorput (Chief Directorate of the Northern Sea Route) was set up in 1932, with Otto Schmidt as its director. It supervised navigation and built Arctic ports.

During the early part of World War II, the Soviets allowed the German auxiliary cruiser Komet to use the Northern Sea Route in the summer of 1940 to evade the British Royal Navy and break out into the Pacific Ocean. Komet was escorted by Soviet icebreakers during her journey. After the start of the Soviet-German War, the Soviets transferred several destroyers from the Pacific Fleet to the Northern Fleet via the Arctic. The Soviets also used the Northern Sea Route to transfer materials from the Soviet Far East to European Russia, and the Germans launched Operation Wunderland to interdict this traffic.

In July 1965, USCGC Northwind (WAGB-282), commanded by Captain Kingdrel N. Ayers USCG, conducted an oceanographic survey between Greenland, Iceland, and Scotland and was the first western vessel to operate in the Kara Sea of the Soviet Union, for which she received the Coast Guard Unit Commendation with Operational Distinguishing Device. The real, (then) classified mission of Northwind was to attempt a transit of the "Northeast Passage". The effort was not successful due to diplomatic reasons and caused an international incident between the U.S.S.R. and U.S.A.[12]

A January 2013 Reuters News report on expanding Russian arctic natural gas shipments to Asia, stated that while shipping traffic on the NSR surged in 2012 to around 1 million tons of various kinds of cargoes, "it pales by comparison with the 1987 peak of 6.6 million tons." It also reported that the Finnish crude oil tanker Uikku was the first non-Russian energy vessel to brave the NSR in 1997.[13]

After the Soviet Union

After the Soviet Union dissolved in the early 1990s, commercial navigation in the Siberian Arctic went into decline.[2] More or less regular shipping is found only from Murmansk to Dudinka in the west and between Vladivostok and Pevek in the east. Ports between Dudinka and Pevek see virtually no shipping. Logashkino and Nordvik were abandoned and are now ghost towns.

Renewed interest[2] led to several demonstration voyages in 1997[14] including the passage of the Finnish product tanker Uikku.[15]

Northern Sea Route

Map of the Arctic region showing the Northern Sea Route (yellow & white dash line), in the context of the Northeast Passage, and Northwest Passage[5]

A similar route to the NEP is the Northern Sea Route (NSR). The NSR is a shipping route defined in Russian legislation as extending from the Novaya Zhelaniya straits (at the Novaya Zemlya archipelago, connecting the Barents Sea to the West and the Kara Sea to the East), to Cape Dezhnev by the Bering Strait. Therefore, the NEP encompasses all the East Arctic seas, and the NSR all the seas except the Barents Sea.[2][16][17] Since the NSR constitutes the majority of the NEP, sometimes the term NSR has been used to refer to the entirety of the NEP.[2][4]

Governance

The governance of the NEP has developed considerably in the late 20th and early 21st centuries. The main sources of governance are the United Nations Convention on the Law of the Sea (UNCLOS), the Arctic Council (AC), the International Maritime Organization (IMO), and the domestic legislation of the Russian Federation. In combination, they cover territorial claims, economic exploitation, technical shipping requirements, environmental protection, and search and rescue responsibilities.[2]

Pacific-Atlantic distances

The Northeast Passage is a shorter route to connect Northeast Asia with Western Europe, compared to the existing routes through the Suez Canal, the Panama Canal, or around the Cape of Good Hope. The table below shows the sailing distances between the major East Asia sea ports, and Rotterdam in Europe (these distances assume no route diversions owing to ice conditions).[2]

Sailing distances between Asia and Europe through the NEP (in nautical miles)[2]
To Rotterdam, via:
From Cape of Good Hope Suez Canal NEP Difference between
Suez and NEP
Yokohama, Japan 14,448 11,133 7,010 37%
Busan, South Korea 14,084 10,744 7,667 29%
Shanghai, China 13,796 10,557 8,046 24%
Hong Kong, China 13,014 9,701 8,594 11%
Ho Chi Minh City, Vietnam 12,258 8,887 9,428 −6%

Commercial value

A usable Northern Sea Route between northern Europe to North Pacific ports would cut time at sea (and resultant fuel consumption) by more than half. For the corporate players in bulk shipping of relative low-value raw materials, cost savings for fuel may appear as a driver to explore the Northern Sea Route for commercial transits, and not necessarily reduced lead time. The Northern Sea Route allows economies of scale compared to coastal route alternatives, with vessel draught and beam limitation. Environmental demands faced by the maritime shipping industry may emerge as a driver for developing the Northern Sea Route. Increased awareness of environmental benefits and costs for both the Northern Sea Route and Suez routes will probably be important factors in this respect.[2][18]

In 2011, four ships sailed the length of the Northern Sea Route and Northeast Passage, from the Atlantic to Pacific Oceans. In 2012, 46 ships sailed the NSR.[19]

In August 2012, Russian media reported that 85% of vessels transiting the Northern Sea Route in 2011 were carrying gas or oil, and 80% were high-capacity tankers.[20]

Environmental concerns

In September 2012, Inuit Circumpolar Conference Chair Jimmy Stotts was reported as saying there is concern that increased shipping could adversely affect indigenous hunting of marine mammals. Also concerning is the lack of infrastructure on the Western Alaska coast to deal with a spill or a wrecked vessel.[20]

Ice conditions

Sea ice extent in March 2013 (left) and September 2013 (right), illustrating the respective monthly averages during the winter maximum and summer minimum extents. The magenta lines indicate the median ice extents in March and September, respectively, during the period 1981–2010.

Unlike the similar latitudes in Alaska and Canada (along the Northwest Passage), parts of the NEP remain ice-free year-round. This is mostly the case of the Barents Sea, by the northern coast of Norway and Northwestern coast of Russia. The Barents sea is affected by the currents of warm water from the Gulf Stream, feeding into the North Atlantic.[2]

Other parts of the NEP (mostly the NSR part), freeze in winter and partially melt in the summer months, especially along the coasts. Since the early 2000s the summer melting has been stronger, and the winter freezing has been weaker, opening the waters to the possibility of more non-ice breaking ships taking advantage of the route for longer periods of time.[2][17][21]

Ice-free ports

Arctic Ocean seaports

Only one Russian seaport in the Barents Sea along the officially defined Northern Sea Route (which begins at the Kara Gates Strait) is ice-free year-round, Murmansk on the Kola Peninsula. Other Arctic ports are generally usable from July to October, or, such as Dudinka, are served by nuclear-powered icebreakers. Beyond the Bering Strait, the end of the Northern Sea Route, and south along Russia's Pacific seaboard Petropavlovsk in Kamchatka, Vanino, Nakhodka, and Vladivostok are accessible year-round.[22]

Transit shipping activity

Due to its harsh climactic conditions and the low population density, the NEP has had relatively little activity. The NSR portion of the NEP experienced its highest levels of activity during the rule of the USSR. The NSR greatly developed as a heavily subsidized domestic route, with traffic peaking in 1987 with 6.58 million tons of cargo carried by 331 ships over 1306 voyages. With the end of the Soviet Union and its subsidies, the NSR traffic collapsed to 1.5–2 M tons of cargo.[2]

Since the early 2000s, the thickness and area extent of the Arctic sea ice has experienced significant reduction, compared to the recorded averages.[21][23] This has led to an increase in transit shipping. In 2011, four ships sailed the entire length of the NEP, 46 in 2012, and 19 in 2013.[2][19] The number of trips is still very small compared to the thousands of ships each year through the Suez Canal. Mainstream container shipping is expected to continue to overwhelmingly use the Suez route, while niche activities like bulk shipping is expected to grow, driven by the mining industries of the Arctic.[24][25]

Ice-free navigation

Nuclear icebreaker NS 50 Let Pobedy escorting the Beluga Fraternity and Beluga Foresight through the Northern Sea Route in 2009

The term "ice free" generally refers to the absence of fast ice, i.e. continuously frozen surface ice sheet cover. Under common usage "ice free" does not mean that there is no Arctic sea ice. "Ice free" regions can contain broken ice cover of varying density, often still requiring appropriately strengthened hulls or icebreaker support for safe passage.

French sailor Eric Brossier made the first passage by sailboat in only one season in the summer of 2002.[26] He returned to Europe the following summer through the Northwest Passage.

The Northern Sea Route was opened by receding ice in 2005 but was closed by 2007. The amount of polar ice had receded to 2005 levels in August 2008. In late August 2008, it was reported that images from the NASA Aqua satellite had revealed that the last ice blockage of the Northern Sea Route in the Laptev Sea had melted. This would have been the first time since satellite records began that both the Northwest Passage and Northern Sea Route had been open simultaneously.[27] However, other scientists suggested that the satellite images may have been misread and that the sea route was not yet passable.[28]

In 2009, the Bremen-based Beluga Group claimed they were the first Western company to attempt to cross the Northern Sea Route for shipping without assistance from icebreakers, cutting 4000 nautical miles off the journey between Ulsan, Korea and Rotterdam.[27][29] The voyage was widely covered and sometimes incorrectly said to be the first time that non-Russian ships made the transit.[30][31][32][33] In 1997, a Finnish oil tanker, Uikku, sailed the length of the Northern Sea Route from Murmansk to the Bering Strait, becoming the first Western ship to complete the voyage.[28]

However, the new (2008) ice-strengthened heavy lift vessels Beluga Fraternity and Beluga Foresight commenced an East-to-West passage of the Northern Sea Route in August 2009[28][34] as part of a small convoy escorted by the Russian nuclear icebreaker NS 50 Let Pobedy, westward through the Bering, Sannikov, and Vilkitskiy Straits. The two vessels embarked Russian ice pilots for the voyage to the western Siberian port of Novyy, in the Yamburg region in the delta of the Ob River. The ships arrived at Novyy on 7 September, discharged their cargo to barges and departed on 12 September, bound for the Kara Gates and Rotterdam. They were the first non-Russian commercial vessels to complete this journey, but not without Russian assistance.[35] The captain of the Beluga Foresight, Valeriy Durov, described the achievement as "...great news for our industry."[35] The president of Beluga Shipping claimed the voyage saved each vessel about 300,000 euros, compared to the normal Korea-to-Rotterdam route by way of the Suez Canal. The company did not disclose how much they paid for the escort service and the Russian pilots. An 18 September 2009 press release stated that the company was planning for six vessels to make Arctic deliveries in 2010.[36] It is not clear that this plan was followed up on.

In 2009, the first two international commercial cargo vessels traveled north of Russia between Europe and Asia.[37] In 2011, 18 ships made the now mostly ice-free transit.[38] During 2011, 34 ships made the transit up from a total of 6 ships in 2010.[39] In 2012, 46 commercial ships made the transit. Petroleum products constituted the largest cargo group.[40] In 2013 71 commercial ships made the transit.[41]

On 28 July 2009, the sailing yacht RX II (36-foot length), with expedition leader Trond Aasvoll and crew Hans Fredrik Haukland and Finn Andreassen left Vardø in Norway on a quest to circumnavigate the North Pole. The northern sea route proved ice free and the three Norwegians sailed into the Bering Strait on 24 September. But Russian bureaucracy managed to do what the arctic waters didn't – to stop their effort to sail around in one season. The boat over-wintered in Nome, and finished the trip through the Northwest passage the following summer.[42]

In September 2010, two yachts circumnavigated the Arctic: Børge Ousland's team aboard The Northern Passage, and Sergei Murzayev's team in the Peter I. These were the first recorded instances of the circumnavigation of the Arctic by sailing yachts in one season.[43]

The largest ship as of 2011 is the 117,000 tonne SCF Baltica loaded with natural-gas condensate.[44]

In 2012, the 288-metre (945 ft) LNG carrier Ob River became the first ship of its kind to transit the Northern Sea Route. The vessel completed the westbound voyage in ballast in only six days and planned to sail back in Asia in November with a full load of liquified natural gas.[45][46] The growth in traffic has been startling. 46 ships sailed the entire length from Europe to East Asia during 2012. By July 2013, the administrators of the Northern Sea Route had granted permission to 204 ships to sail during the season.[47] By that time, Arctic sea ice had declined substantial especially on the Atlantic side of the Arctic. "On July 15 extent came within 540,000 square kilometers (208,000 square miles) of that seen in 2012 on the same date... (Compared to the 1981 to 2010 average, ice extent on July 15, 2013 was 1.06 million square kilometers (409,000 square miles) below average.)"[48] (Summer 2012 Arctic sea ice volume reached a record low.)

During early September 2013 the Russian battlecruiser Petr Velikiy led a flotilla of Russian navy ships with icebreaker support along the Northern Sea Route to the New Siberian Islands. About 400 ships were expected to transit the Russian portion of the route during the 2013 season, up from about 40 during 2012.[49]

On 15 September 2015, the Chinese trimaran Qingdao China set a speed record by sailing from Murmansk to the Bering Strait in 13 days.[50]

Commemoration

In 2007, Finland issued a €10 Adolf Erik Nordenskiöld and Northeast Passage commemorative coin to celebrate the 175th anniversary of Nordenskiöld's birth and his discovery of the northern sea route. The obverse features an abstract portrait of Nordenskiöld at the helm of his ship. The reverse is dominated by a pattern resembling the labyrinth formed by adjacent ice floes. The coin is one of the Europa Coins 2007 series, which celebrates European achievements in history.

References

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  40. ↑ "46 vessels through Northern Sea Route". Barentsobserver. 23 November 2012. Archived from the original on 8 January 2015.
  41. ↑ "Final statistics figures for transit navigation on the NSR in 2013". Northern Sea Route Information Office. 22 November 2013. Archived from the original on 24 May 2014. Retrieved 23 May 2014.
  42. ↑ "Arctic expedition round the North Pole, through both the Northeast Passage and the Northwest Passage with RX2" Archived 20 July 2012 at the Wayback Machine.
  43. ↑ Pettersen, Trude. "Around the North Pole in less than three months" Archived 6 May 2013 at the Wayback Machine. Barents Observer, 24 September 2010. Retrieved: 7 August 2012.
  44. ↑ Stensvold, Tore. "No queue through the Northeast Passage" Archived 6 January 2015 at the Wayback Machine., Teknisk Ukeblad 22 June 2011. Retrieved: 7 August 2012.
  45. ↑ Preparing for LNG on Northern Sea Route Archived 29 November 2014 at the Wayback Machine.. Barents Observer, 23 October 2012. Retrieved 2 November 2012.
  46. ↑ LNG Tanker Ob River Prepares for Northern Sea Route Archived 29 November 2014 at the Wayback Machine.. World Maritime News, 31 October 2012. Retrieved 2 November 2012.
  47. ↑ Richard Milne (22 July 2013). "Arctic shipping set to grow as sea ice melts". BDlive. Archived from the original on 29 November 2014. Retrieved 10 April 2014.
  48. ↑ "A change of pace | Arctic Sea Ice News and Analysis". Nsidc.org. 17 July 2013. Archived from the original on 15 April 2014. Retrieved 10 April 2014.
  49. ↑ Andrew E. Kramer (14 September 2013). "Russia Preparing Patrols of Arctic Shipping Lanes". The New York Times. Archived from the original on 18 September 2013. Retrieved 15 September 2013.
  50. ↑ "GuoChuan Racing completes Arctic Ocean World Record challenge". guochuansailing.com. 16 September 2015. Archived from the original on 18 October 2015. Retrieved 14 October 2015.

Further reading

  • Østreng, Willy; Eger, Karl Magnus; Fløistad, Brit; Jørgensen-Dahl, Arnfinn; Lothe, Lars; Mejlænder-Larsen, Morten; Wergeland, Tor (2013). Shipping in Arctic Waters: A Comparison of the Northeast, Northwest and Trans Polar Passages. Springer. doi:10.1007/978-3-642-16790-4. ISBN 978-3642167898.
  • Brigham, L.; McCalla, R.; Cunningham, E.; Barr, W.; VanderZwaag, D.; Chircop, A.; Santos-Pedro, V.M.; MacDonald, R.; Harder, S.; Ellis, B.; Snyder, J.; Huntington, H.; Skjoldal, H.; Gold, M.; Williams, M.; Wojhan, T.; Williams, M.; Falkingham, J. (2009). Brigham, Lawson; Santos-Pedro, V.M.; Juurmaa, K., eds. Arctic marine shipping assessment (AMSA) (PDF). Norway: Protection of the Arctic Marine Environment (PAME), Arctic Council. Archived (PDF) from the original on 1 November 2014.
  • Keupp (Ed.), Marcus M. (2015). The Northern Sea Route. SpringerGabler. ISBN 978-3-658-04080-2.
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