Scapa Flow

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Red pog.svg
 Scapa
 Flow
Location in Scotland
Scapa Flow location map Scapa Flow.svg
Scapa Flow location map
Scapa Flow viewed from its eastern end in June 2009 Scapa Flow - Churchill Barrier 1 - kingsley - 29-JUN-09.JPG
Scapa Flow viewed from its eastern end in June 2009

Scapa Flow ( /ˈskɑːpə/ or /ˈskæpə/ ; from Old Norse Skalpaflói, meaning 'bay of the long isthmus' [1] ) is a body of water in the Orkney Islands, Scotland, sheltered by the islands of Mainland, Graemsay, Burray, [2] South Ronaldsay and Hoy. Its sheltered waters have been used by ships since prehistory and it has played an important role in travel, trade and conflict throughout the centuries – especially during both World Wars.

Orkney archipelago in northern Scotland

Orkney, also known as the Orkney Islands, is an archipelago in the Northern Isles of Scotland, situated off the north coast of the isle of Great Britain. Orkney is 16 kilometres (10 mi) north of the coast of Caithness and comprises approximately 70 islands, of which 20 are inhabited. The largest island, Mainland, is often referred to as "the Mainland", and has an area of 523 square kilometres (202 sq mi), making it the sixth-largest Scottish island and the tenth-largest island in the British Isles. The largest settlement and administrative centre is Kirkwall.

Scotland country in Northwest Europe, part of the United Kingdom

Scotland is a country that is part of the United Kingdom. It covers the northern third of the island of Great Britain, with a border with England to the southeast, and is surrounded by the Atlantic Ocean to the north and west, the North Sea to the northeast, the Irish Sea to the south, and more than 790 islands, including the Northern Isles and the Hebrides.

Graemsay island in the western approaches to Scapa Flow, in the Orkney Islands of Scotland

Graemsay is an island in the western approaches to Scapa Flow, in the Orkney Islands of Scotland. The island has two lighthouses.

Contents

A consultation in ballast water management in 2013 measured the commonly used Harbour Authority definition of Scapa Flow at 324.5 square kilometres (125.3 sq mi) and just under 1 billion cubic metres of water.

Use

Since the post-World War I scuttling of the German fleet at Scapa Flow, its wrecks and their marine habitats form an internationally acclaimed diving location. Scapa Flow hosts an oil port in the form of the Flotta Oil Terminal and barring turbulent weather provides a sufficient roadstead (water of moderate conditions) for ship-to-ship transfers of crude oil product and liquefied natural gas (LNG). The world’s first ship-to-ship transfer of LNG took place in Scapa Flow in 2007.[ citation needed ]

Scuttling of the German fleet at Scapa Flow attempted scuttling of the captured German fleet in 1919

The scuttling of the German fleet took place at the Royal Navy's base at Scapa Flow, in Scotland, after the First World War. The High Seas Fleet was interned there under the terms of the Armistice whilst negotiations took place over the fate of the ships. Fearing that all of the ships would be seized and divided amongst the allied powers Admiral Ludwig von Reuter decided to scuttle the fleet.

Underwater diving Descending below the surface of the water to interact with the environment

Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving. Humans are not physiologically and anatomically well adapted to the environmental conditions of diving, and various equipment has been developed to extend the depth and duration of human dives, and allow different types of work to be done.

Flotta small island in Orkney, Scotland, lying in Scapa Flow

Flotta is a small island in Orkney, Scotland, lying in Scapa Flow. The island is known for its large oil terminal and is linked by Orkney Ferries to Houton on the Orkney Mainland and Lyness and Longhope on Hoy. The island has a population of 80.

Geology

Scapa Flow has a shallow sandy bottom not deeper than 60 metres (200 ft) and most of it is about 30 m (100 ft) deep, and is one of the great natural harbours/anchorages of the world, with sufficient space to hold a number of navies.

Historical shipping use

Vikings anchored their longships in Scapa Flow more than a thousand years ago, but it is best known as the site of the United Kingdom's chief naval base during World War I and World War II. The facility was closed in 1956.

Vikings Norse explorers, warriors, merchants, and pirates

Vikings were Norse seafarers, mainly speaking the Old Norse language, who during the late 8th to late 11th centuries, raided and traded from their Northern European homelands across wide areas of Europe, and explored westwards to Iceland, Greenland, and Vinland. The term is also commonly extended in modern English and other vernaculars to the inhabitants of Norse home communities during what has become known as the Viking Age. This period of Nordic military, mercantile and demographic expansion constitutes an important element in the early medieval history of Scandinavia, Estonia, the British Isles, France, Kievan Rus' and Sicily.

Longship sea vessel used by the Vikings

Longships were a type of specialised Viking warships that have a long history in Scandinavia. Their existence being archaeologically proven and documented from at least the fourth century BC. Originally invented and used by the Norsemen for commerce, exploration, and warfare during the Viking Age, many of the longship’s characteristics were adopted by other cultures, like Anglo-Saxons and continued to influence shipbuilding for centuries. The longship's design evolved over many centuries, beginning in the Stone Age with the invention of the umiak and continuing up until the 6th century with clinker-built ships like Nydam and Kvalsund. The longship appeared in its complete form between the 9th and 13th centuries. The character and appearance of these ships have been reflected in Scandinavian boat-building traditions until today. The particular skills and methods employed in making longships are still used worldwide, often with modern adaptations. They were all made out of wood, with cloth sails and had numerous details and carvings on the hull.

United Kingdom Country in Europe

The United Kingdom, officially the United Kingdom of Great Britain and Northern Ireland but more commonly known as the UK or Britain, is a sovereign country lying off the north-western coast of the European mainland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands. Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state‍—‌the Republic of Ireland. Apart from this land border, the United Kingdom is surrounded by the Atlantic Ocean, with the North Sea to the east, the English Channel to the south and the Celtic Sea to the south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of 242,500 square kilometres (93,600 sq mi), the United Kingdom is the 78th-largest sovereign state in the world. It is also the 22nd-most populous country, with an estimated 66.0 million inhabitants in 2017.

Viking era

The Viking expeditions to Orkney are recorded in detail in the 11th century Orkneyinga sagas and later texts such as the Hákonar saga Hákonarsonar .

<i>Orkneyinga saga</i>

The Orkneyinga saga is a historical narrative of the history of the Orkney and Shetland islands and their relationship with other local polities, particularly Norway and Scotland. The saga has "no parallel in the social and literary record of Scotland" and is "the only medieval chronicle to have Orkney as the central place of action". The main focus of the work is the line of jarls who ruled the Earldom of Orkney, which constituted the Norðreyjar or Northern Isles of both Orkney and Shetland and there are frequent references to both archipelagoes throughout.

<i>Hákonar saga Hákonarsonar</i> Norse saga

Hákonar saga Hákonarsonar or Hákonar saga gamla Hákonarsonar is an Old Norse Kings' Saga, telling the story of the life and reign of King Haakon Haakonarson of Norway.

According to the latter, King Haakon IV of Norway anchored his fleet, including the flagship Kroussden that could carry nearly 300 men, on 5 August 1263 at St Margaret's Hope, where he saw an eclipse of the sun before he sailed south to the Battle of Largs.

Haakon IV of Norway King of Norway

Haakon Haakonsson, sometimes called Haakon the Old in contrast to his son with the same name, and known in modern regnal lists as Haakon IV, was the King of Norway from 1217 to 1263. His reign lasted for 46 years, longer than any Norwegian king since Harald I. Haakon was born into the troubled civil war era in Norway, but his reign eventually managed to put an end to the internal conflicts. At the start of his reign, during his minority, his later rival Earl Skule Bårdsson served as regent. As a king of the birkebeiner faction, Haakon defeated the uprising of the final bagler royal pretender, Sigurd Ribbung, in 1227. He put a definitive end to the civil war era when he had Skule Bårdsson killed in 1240, a year after he had himself proclaimed king in opposition to Haakon. Haakon thereafter formally appointed his own son as his co-regent.

St Margarets Hope village in the United Kingdom

St Margaret's Hope is a village in the Orkney Islands, off the north-east coast of Scotland. It is known locally as "The Hope" or "The Hup". With a population of about 550, it is Orkney's third largest settlement after Kirkwall and Stromness.

Solar eclipse natural phenomenon wherein the Sun is obscured by the Moon

A solar eclipse occurs when an observer passes through the shadow cast by the Moon which fully or partially blocks ("occults") the Sun. This can only happen when the Sun, Moon and Earth are nearly aligned on a straight line in three dimensions (syzygy) during a new moon when the Moon is close to the ecliptic plane. In a total eclipse, the disk of the Sun is fully obscured by the Moon. In partial and annular eclipses, only part of the Sun is obscured.

En route back to Norway Haakon anchored some of his fleet in Scapa Flow for the winter, but he died that December whilst staying at the Bishop's Palace in Kirkwall. [3] In the 15th century towards the end of Norse rule in Orkney, the islands were run by the jarls from large manor farms, some of which were at Burray, Burwick, Paplay, Hoy, and Cairston (near Stromness) to guard the entrances to the Flow. [4]

Bishops Palace, Kirkwall

The Bishop's Palace, Kirkwall is a 12th-century palace built at the same time as the adjacent St Magnus Cathedral in the centre of Kirkwall, Orkney, Scotland. It housed the cathedral's first bishop, William the Old of the Norwegian Catholic church who took his authority from the Archbishop of Nidaros (Trondheim). The ruined structure now looks like a small castle.

Kirkwall town in Orkney Islands, Scotland

Kirkwall is the largest settlement and capital of Orkney, an archipelago to the north of mainland Scotland.

Burray island

Burray is one of the Orkney Islands in Scotland. It lies to the east of Scapa Flow and is one of a chain of islands linked by the Churchill Barriers.

Wars of the Three Kingdoms

In 1650 during the wars of the Three Kingdoms, the Royalist general James Graham, 1st Marquess of Montrose, moored his ship, the Herderinnan, in Scapa Flow, in preparation for his attempt to raise a rebellion in Scotland. The enterprise ended in failure and rout at the Battle of Carbisdale.

World War I

Location of Orkney within Scotland ScotlandOrkneyIslands.svg
Location of Orkney within Scotland

Base for the British Grand Fleet

Historically, the main British naval bases were near the English Channel to counter the country’s imperial rivals: the Netherlands (until the accession of William of Orange), France, and Spain.

In 1904 in response to the build-up of the German Kaiserliche Marine's High Seas Fleet, Britain decided that a northern base was needed to control the entrances to the North Sea, as part of a revised policy of 'distant' rather than 'close' blockade. First Rosyth in Fife was considered then Invergordon at Cromarty Firth. Delayed construction left these largely unfortified by the outbreak of World War I. Scapa Flow had been used many times for British exercises in the years before the War and when the time came for the fleet to move to a northern station, it was chosen for the main base of the British Grand Fleet unfortified. [5]

John Rushworth Jellicoe, admiral of the Grand Fleet, was perpetually nervous about the possibility of submarine or destroyer attacks on Scapa Flow. Whilst the fleet spent almost the first year of the war patrolling the west coast of the British Isles, their base at Scapa was defensively reinforced, beginning with over sixty block-ships sunk in the many entrance channels between the southern islands to facilitate the use of submarine nets and booms. These blocked approaches were backed by minefields, artillery, and concrete barriers. [5]

Two attempts to enter the harbour were made by German U-boats during the war and neither was successful:

  1. U-18 tried to enter in November 1914. A trawler searching for submarines rammed her causing her to leak, prompting her flight and surfacing—one crew member died.
  2. UB-116 made a foray in October 1918 but encountered the sophisticated defences then in place, detected by hydrophones before entering the anchorage, then destroyed by shore-triggered mines causing all 36 hands to perish. [6]

After the Battle of Jutland, the German High Seas Fleet rarely ventured out of its bases at Wilhelmshaven and Kiel and in the last two years of the war the British fleet was considered to have such a commanding superiority of the seas that some components moved south to the first-class dockyard at Rosyth.

The scuttling of the German fleet

Following the German defeat in WWI, 74 ships of the Imperial German Navy's High Seas Fleet were interned in Gutter Sound at Scapa Flow pending a decision on their future in the peace Treaty of Versailles.

On 21 June 1919, after seven months of waiting, German Rear Admiral Ludwig von Reuter made the decision to scuttle the fleet because the negotiation period for the treaty had lapsed with no word of a settlement. He was not kept informed that there had been a last-minute extension to finalise the details.

After waiting for the bulk of the British fleet to leave on exercises, he gave the order to scuttle the ships to prevent their falling into British hands. The Royal Navy made desperate efforts to board the ships to prevent the sinkings, but the German crews had spent the idle months preparing for the order, welding bulkhead doors open, laying charges in vulnerable parts of the ships, and quietly dropping important keys and tools overboard so valves could not be shut.

The Royal Navy managed to beach the battleship Baden, the light cruisers Nürnberg, and Frankfurt and 18 destroyers whereas 53 ships, the vast bulk of the High Seas Fleet, were sunk. Nine German sailors died on one of these ships when British forces opened fire as they attempted to scuttle the ship, reputedly the last casualties of WWI.

SMS Emden was amongst the ships the British managed to beach. This Emden should not be confused with her predecessor, destroyed in the Battle of Cocos on 9 November 1914 by the Australian light cruiser HMAS Sydney.

At least seven of the scuttled German ships and a number of sunken British ships can today be visited by scuba divers.

Salvage operation

Although many of the larger ships turned turtle and came to rest upside down or on their sides in relatively deep water (25–45 m), some—including the battlecruiser Moltke—were left with parts of their superstructure or upturned bows still protruding from the water or just below the surface.

These ships posed a severe hazard to navigation, and small boats, trawlers and drifters, moving around the Flow regularly became snagged on them with the rise and fall of the tides. The Admiralty initially declared that there would be no attempt at salvage, that the sunken hulks would remain where they were, to 'rest and rust.' In the first few years after the war, there was abundant scrap metal as a result of the huge quantities of leftover tanks, artillery and ordnance. By the early 1920s, the situation had changed.

In 1922, the Admiralty invited tenders from interested parties for the salvage of the sunken ships, although at the time few believed that it would be possible to raise the deeper wrecks. [2] The contract went to a wealthy engineer and scrap metal merchant, Ernest Cox, who created a new company, a division of Cox & Danks Ltd, for the venture, and so began what is often called the greatest maritime salvage operation of all time. [2]

During the next eight years, Cox and his workforce of divers, engineers, and labourers engaged in the complex task of raising the sunken fleet. First the relatively small destroyers were winched to the surface using pontoons and floating docks to be sold for scrap to help finance the operation, then the bigger battleships and battlecruisers were lifted, by sealing the multiple holes in the wrecks, and welding to the hulls long steel tubes which protruded above the water, for use as airlocks. In this fashion the submerged hulls were made into air-tight chambers and raised with compressed air, still inverted, back to the surface.

Cox endured bad luck and frequent fierce storms which often ruined his work, swamping and re-sinking ships which had just been raised. At one stage, during the General Strike of 1926, the salvage operation was about to grind to a halt due to a lack of coal to feed the many boilers for the water pumps and generators. Cox ordered that the abundant fuel bunkers of the sunken (but only partly submerged) battlecruiser Seydlitz be broken into to extract the coal with mechanical grabs, allowing work to continue.

Although he ultimately lost money on the contract, Cox kept going, employing new technology and methods as conditions dictated. By 1939, Cox and Metal Industries Ltd. (the company that he had sold out to in 1932) had successfully raised 45 of the 52 scuttled ships. The last, the massive Derfflinger, was raised from a record depth of 45 metres just before work was suspended with the start of WWII, before being towed to Rosyth where it was broken up in 1946.

A Morse key recovered from the battleship Grosser Kurfürst during the salvage is displayed at a Fife museum. [7]

World War II

Blockship, Scapa Flow Block Ship, Scapa Flow.jpg
Blockship, Scapa Flow

Primarily because of its great distance from German airfields, Scapa Flow was again selected as the main British naval base during World War II. [8]

The strong defences built during World War I had fallen into disrepair. Defence against air attack was inadequate and blockships sunk to stop U-boats from penetrating had largely collapsed. While there were anti-submarine nets in place over the three main entrances, they were made only of single-stranded looped wire; there was also a severe lack of the patrolling destroyers and other anti-submarine craft that had previously been available. Efforts began belatedly to repair peacetime neglect, but were not completed in time to prevent a successful penetration by enemy forces. [9]

On 14 October 1939, under the command of Günther Prien, U-47 penetrated Scapa Flow and sank the WWI–era battleship HMS Royal Oak anchored in Scapa Bay. [10] After firing its first torpedo, the submarine turned to make its escape; but, upon realising that there was no immediate threat from surface vessels, it returned for another attack. The second torpedo blew a 30-foot (9.1 m) hole in the Royal Oak, which flooded and quickly capsized. Of the 1,400-man crew, 833 were lost. The wreck is now a protected war grave. [11] [12] John Gunther in December 1939 called the attack "the single most extraordinary feat of the war so far". [13]

Three days after the submarine attack, four Luftwaffe Junkers Ju 88 bombers of Kampfgeschwader 1/30 led by group commander Hauptmann Fritz Doench raided Scapa Flow on 17 October in one of the first bombing attacks on Britain during the war. The attack badly damaged an old base ship, the decommissioned battleship HMS Iron Duke, which was then beached at Ore Bay by a tug. One man died and 25 were injured. One of the bombers was shot down by No 1 gun of 226 Heavy Anti-Aircraft Battery on Hoy. Three of the crew died, while the radio operator Fritz Ambrosius was badly burned but managed to parachute down. [14]

New blockships were sunk, booms and mines were placed over the main entrances, coast defence and anti-aircraft batteries were installed at crucial points, and Winston Churchill ordered the construction of a series of causeways to block the eastern approaches to Scapa Flow; they were built by Italian prisoners of war held in Orkney, who also built the Italian Chapel. These "Churchill Barriers" now provide road access from Mainland to Burray and South Ronaldsay, but block maritime traffic. An air base, RAF Grimsetter (which later became HMS Robin), was built and commissioned in 1940. [15]

Today

Use by the petroleum industry

Petroleum tankers wait at anchor in Scapa Flow. The calm waters, relative to the North Sea, provide a safe harbour for the oil terminal at Flotta Tankers in Scapa Flow - Mainland Orkney - kingsley - 29-JUN-09.JPG
Petroleum tankers wait at anchor in Scapa Flow. The calm waters, relative to the North Sea, provide a safe harbour for the oil terminal at Flotta

Scapa Flow is one of the transfer and processing points for North Sea oil. A 30-inch(-diameter), 128-mile underwater pipeline brings oil from the Piper oilfield to the Flotta oil terminal. The Claymore and Tartan oil fields also feed into this line.

Scapa Flow Visitor Centre

Commons-logo.svg Media related to Scapa Flow Visitor Centre at Wikimedia Commons

Scapa Flow Visitor Centre, Hoy ScapaFlowVisitorCentreRLH.jpg
Scapa Flow Visitor Centre, Hoy

The Scapa Flow Visitor Centre is at Lyness on Hoy (from Háey meaning high island) the second largest of Orkney. Morning to evening ferries run from Houton on the Mainland.

It occupies a converted naval fuel pumping station and storage tank and next to it is a round stone-built battery emplacement and artillery gun as well as other decommissioned arsenal. It features a large model of the island, Scapa Flow and of the German warships.

Scuba diving

The wreckage of the remaining seven ships of the German fleet (and some other sites such as the blockships) has become increasingly popular as a venue for recreational scuba divers, and is regularly listed in dive magazines and internet forums among the top dive sites in the UK, Europe, and even the world. Although other locations, for example the Pacific regions, offer warmer water and better visibility, there are very few other sites which can offer such an abundance of large, historic wrecks lying in close proximity and shallow, relatively benign diving conditions. As of 2010, at least twelve "live aboard" boats—mostly converted trawlers with bunk rooms in their former holds—take recreational divers out to the main sites, primarily from the main harbour at Stromness. Diving provides a substantial amount of trade and income for the local economy.

Divers must first obtain a permit from the Island Harbour Authorities, which is available through diving shops and centres. The wrecks are mostly located at depths of 35 to 50 metres. Divers are permitted to enter the wrecks, but not to retrieve artefacts located within 100 metres of any wreck. However, time and tide has washed broken pieces of ships' pottery and glass bottles into shallow waters and onto beaches. The underwater visibility, which can vary between 2 and 20 metres, is not sufficient to view all the length of most wrecks at once; however, current technology is now allowing 3D images of them to be seen. [16] [17]

The important wrecks are:

German battleships

The three sister battleships of the Königclass: SMS König, SMS Kronprinz and SMS Markgraf formed the main component of the 3rd Battleship Squadron which took part in fierce fighting at the Battle of Jutland far off the coast of Jutland, Denmark (31 May to 1 June 1916) and their upturned hulls are around 25 m deep. Never raised, they have been salvaged incrementally: armour plate blasted away and non-ferrous metals removed. They form highly rated dive sites chiefly due to their depth.[ citation needed ]

German light cruisers

The light cruisers SMS Dresden, SMS Karlsruhe, SMS Brummer and SMS Cöln have modest fighting tops, lie side-on with around 16–20 metres of water above, are more accessible for divers and save for the shallowest, Karlsruhe, are less salvaged (stripped of valuable materials) than the battleships.

Other vessels

Additional sites of interest include the destroyer SMS V83, which was raised and used by Cox as a working boat during his salvage operations, particularly on SMS Hindenburg, then later abandoned; the Churchill blockships, such as the Tabarka, the Gobernador Bories, and the Doyle in Burra Sound; the U-boat SM UB-116; and the trawler James Barrie. Also, some large items from many of the ship hulls that were raised (such as the main gun turrets, which fell away from the ships as they capsized) were never salvaged, and still exist on the seabed in close proximity to the impact craters created by the scuttled ships.

War grave wrecks

The memorial tower to HMS Hampshire and Lord Kitchener Kitchener Memorial - geograph.org.uk - 954841.jpg
The memorial tower to HMS Hampshire and Lord Kitchener

The wrecks of the battleships Royal Oak and Vanguard (which exploded at anchor during World War I) are war graves designated as Controlled Sites under the Protection of Military Remains Act 1986—only divers of the British armed forces may visit these wrecks. [18] With equal legal status, commemorated in a museum by the water is the wreck of the armoured cruiser Hampshire, which hit a mine when carrying 14 passengers including Lord Kitchener bound for Arkhangelsk, Russia on 5 June 1916 and sank off the west coast of the mainland. The large armoured cruiser went down in fifteen minutes in a heavy storm four days after the Battle of Jutland leaving 12 survivors and 737 dead in 70 metres of water 1.5 miles off steep cliffs of Marwick Head on which a square tower Memorial stands.

Curse

According to legend, a curse was placed on Scapa long ago by a witch. She buried a thimble in the sand at Nether Scapa, and until it was found no more whales would be caught in the area. [19]

See also

References and sources

References
  1. Scapa Flow: Graveyard of the German Fleet, Will Springer.[ page needed ]
  2. 1 2 3 S. C. George, Jutland to Junkyard, 1973.
  3. Thompson (2008) pp. 141–43.
  4. Thompson (2008) pp. 223–34.
  5. 1 2 Robert K. Massie (2004). Castles of Steel . Ballantine Books. ISBN   0-345-40878-0.[ page needed ]
  6. Helgason, Guðmundur. "WWI U-boats: UB 116". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net.
  7. Museum of Communication, 131 High Street, Burntisland.
  8. The Twilight War: Winston Churchill 1948
  9. James Miller, The North Atlantic Front: Orkney, Shetland, Faroe and Iceland at War (2004)
  10. Rick D. Joshua. "U-boat U-47". u47.org. Retrieved 16 October 2009.
  11. David Turner, Last Dawn: The Royal Oak Tragedy at Scapa Flow (Argyll Publishing, 2008).
  12. H. J. Weaver, Nightmare at Scapa Flow: the truth about the sinking of HMS Royal Oak (Cressrelles, 1980).
  13. Gunther, John (1940). Inside Europe. New York: Harper & Brothers. pp. xxi.
  14. Geirr H. Haarr (24 September 2013). The Gathering Storm: The Naval War in Northern Europe September 1939 – April 1940. Seaforth Publishing. pp. 240–243. ISBN   978-1-4738-3131-5.
  15. M. Brown and P. Meehan, Scapa Flow: the reminiscences of men and women who served in Scapa Flow in the two World Wars (Allen Lane, Penguin, 1968).
  16. "Scapa Flow : Historic Wreck Site". www.scapaflowwrecks.com. Retrieved 10 August 2017.
  17. "Scapa Flow in 3D". DiverNet. Archived from the original on 6 June 2011. Retrieved 16 October 2009.
  18. Wrecks designated as Military Remains, Maritime and Coastguard Agency, retrieved 27 December 2006
  19. "A curse on the sands at Scarpa – An introduction to Orkney witches – Folklore and old stories – Culture and tradition – Scapa Flow Landscape Partnership Scheme". Scapa Flow Landscape Partnership Scheme. 2011. Retrieved 29 July 2014.
Sources

Further reading

Coordinates: 58°54′N3°03′W / 58.900°N 3.050°W / 58.900; -3.050

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SMS <i>Frankfurt</i> ship

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Lyness village on the east coast of the island of Hoy, Orkney, Scotland

Lyness is a village on the east coast of the island of Hoy, Orkney, Scotland. The village is within the parish of Walls and Flotta, and is situated at the junction of the B9047 and B9048.

SMS G39 was a 1913 Type Large Torpedo Boat of the Imperial German Navy during World War I, and the 15th ship of her class.

SMS G38 was a 1913 Type Large Torpedo Boat of the Imperial German Navy during World War I, and the 14th ship of her class.

SMS G40 was a 1913 Type Large Torpedo Boat of the Imperial German Navy during World War I, and the 16th ship of her class.

SMS V45 was a 1913 Type Large Torpedo Boat of the Imperial German Navy during World War I, and the 21st ship of her class.

SMS <i>Bremse</i> Brummer-class cruiser

SMS Bremse was a Brummer-class minelaying light cruiser of the German Kaiserliche Marine. She was built by AG Vulcan Stettin in 1915 and launched on 11 March 1916 at Stettin, Germany, the second of the two-ship class after her sister, SMS Brummer. She served during the First World War, operating for most of the time in company with her sister. The two ships took part in an ambush on a convoy in the North Sea, where they sank two destroyers in a surprise attack, before hunting down and sinking nine merchantmen, after which they returned to port unscathed.

SMS <i>Markgraf</i> German battleship scuttled in Scapa Flow

SMS Markgraf was the third battleship of the four-ship König class. She served in the Imperial German Navy during World War I. The battleship was laid down in November 1911 and launched on 4 June 1913. She was formally commissioned into the Imperial Navy on 1 October 1914, just over two months after the outbreak of war in Europe. Markgraf was armed with ten 30.5-centimeter (12.0 in) guns in five twin turrets and could steam at a top speed of 21 knots. Markgraf was named in honor of the royal family of Baden. The name Markgraf is a rank of German nobility and is equivalent to the English Margrave, or Marquess.

Innes McCartney Nautical archaeologist

Dr. Innes J. McCartney is a British nautical archaeologist, and historian. He is currently a Leverhulme Early Career Fellow at Bournemouth University.

The following index is provided as an overview of and topical guide to recreational dive sites: