Scapa Flow (// or //; from Old Norse Skalpaflói, meaning 'bay of the long isthmus') is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, 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.
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.
- 1 Use
- 2 Geology
- 3 Historical shipping use
- 4 Viking era
- 5 Wars of the Three Kingdoms
- 6 World War I
- 7 Salvage operation
- 8 World War II
- 9 Today
- 10 Scuba diving
- 11 Curse
- 12 Gallery
- 13 See also
- 14 References and sources
- 15 Further reading
- 16 External links
Since the post-World War I scuttling of the German fleet in 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.
Scapa Flow has a shallow sandy bottom not deeper than 60 metres (200 ft) and most of it 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.
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 witnessed an eclipse of the sun prior to sailing south to the Battle of Largs.
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. 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 sited at Burray, Burwick, Paplay, Hoy, and Cairston (near Stromness) to guard the entrances to the Flow.
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
Base for the British Grand Fleet
Historically, the main British naval bases were located near the English Channel to better face Britain's old enemies, France, Spain, and the Netherlands. In 1904, in response to the build-up of the German Kaiserliche Marine's High Seas Fleet, it was 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 was considered for the base, then Invergordon at Cromarty Firth, but construction in both places was delayed, leaving them largely unfortified by the outbreak of WWI. Scapa Flow had been used many times for exercises in the years before the War, and when the time came for the fleet to move to a northern station, Scapa Flow was chosen for the main base of the British Grand Fleet, even though it was also unfortified.
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.
Only two attempts to enter the harbour were made by German U-boats during the war, and neither was successful. U-18 tried to enter in November 1914, but a trawler searching for submarines rammed it, causing U-18 to flee and then sink. UB-116 made the second attempt in October 1918 but encountered the sophisticated defences then in place. It was detected by hydrophones before entering the anchorage, then destroyed by shore-triggered mines.
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, Rear Admiral Ludwig von Reuter, the German officer in command at Scapa Flow, 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 British 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 be visited by scuba divers.
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. 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.
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.
World War II
Primarily because of its great distance from German airfields, Scapa Flow was again selected as the main British naval base during WWII.
The strong defences built during WWI 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.
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. 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.
Three days after this 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.
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.
Use by the petroleum industry
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
Media related to Scapa Flow Visitor Centre at Wikimedia Commons
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.
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.
The important wrecks are:
The three sister battleships of the König class: 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 Jutland, Denmark coast (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 and depth.
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.
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 wrecks of the battleships Royal Oak and Vanguard (which exploded at anchor during World War I) are war graves protected under the Protection of Military Remains Act 1986 — only divers of the British armed forces may visit these wrecks. 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.
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.
References and sources
- Scapa Flow: Graveyard of the German Fleet, Will Springer.[page needed]
- S. C. George, Jutland to Junkyard, 1973.
- Thompson (2008) pp. 141–43.
- Thompson (2008) pp. 223–34.
- Robert K. Massie (2004). Castles of Steel. Ballantine Books. ISBN 0-345-40878-0.[page needed]
- The Twilight War: Winston Churchill 1948
- James Miller, The North Atlantic Front: Orkney, Shetland, Faroe and Iceland at War (2004)
- Rick D. Joshua. "U-boat U-47". u47.org. Retrieved 16 October 2009.
- David Turner, Last Dawn: The Royal Oak Tragedy at Scapa Flow (Argyll Publishing, 2008).
- H. J. Weaver, Nightmare at Scapa Flow: the truth about the sinking of HMS Royal Oak (Cressrelles, 1980).
- 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.
- 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).
- "Scapa Flow : Historic Wreck Site". www.scapaflowwrecks.com. Retrieved 10 August 2017.
- "Scapa Flow in 3D". DiverNet. Archived from the original on 6 June 2011. Retrieved 16 October 2009.
- Wrecks designated as Military Remains, Maritime and Coastguard Agency, retrieved 27 December 2006
- "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.
- George, S. C. (1981). Jutland to Junkyard. Edinburgh: Paul Harris Publishing. ISBN 0-86228-029-X. Describes the scuttling of the High Seas Fleet.
- Thomson, William P. L. (2008). The New History of Orkney. Edinburgh: Birlinn. ISBN 978-1-84158-696-0.
- Wood, Lawson (2007). Scapa Flow Dive Guide. AquaPress Publishing. ISBN 1-905492-04-9. A comprehensive guide to diving the wrecks and reefs of Scapa Flow.
- Booth, Tony. Cox's Navy: Salvaging the German High Seas Fleet at Scapa Flow 1924-1931. Barnsley: Pen & Sword Maritime, 2005. ISBN 978-1-8441-5181-3
- Brown, Malcolm & Patricia Meehan. Scapa Flow. London: Pan Books, 2002. ISBN 1-4050-0785-0.
- Konstam, Angus. Scapa Flow: The Defences of Britain's Great Fleet Anchorage 1914-45. Oxford: Osprey Publishing, 2009. ISBN 978-1-8460-3366-7
|Wikimedia Commons has media related to Scapa Flow.|
- Scapa Flow Visitor Centre and Museum
- Scapa Flow website by North Walls Community School
- Scuttling of the High Seas Fleet at Scapa Flow
- About the shipwrecks at Scapa Flow
- Listing of German and scuttled ships.
- Scapa Flow Marine Archaeology Project
- Orkney Wireless Museum (in Kirkwall)
- Ness Battery: A WWII coast battery near Stromness
- Website for Orkney Defence Interest Network