154-568: Asia Pacific Gateway (APG) is a submarine communications cable system that connects Mainland China , Hong Kong , Japan , South Korea , Malaysia , Taiwan , Thailand , Vietnam and Singapore . It will be about 10,400 kilometres (6,500 mi) long. The capacity will be 54.8 terabits per second. The APG cable consortium includes Facebook , CAT Telecom , China Telecom , China Mobile International, China Unicom , Chunghwa Telecom , KT Corporation , LG Uplus , NTT Communications, StarHub , Global Transit, Viettel and VNPT . The APG cable system
308-941: A referendum on devolution proposals in 1997 , the Scotland Act 1998 was passed by the British Parliament, which established a devolved Scottish Parliament and Scottish Government with responsibility for most laws specific to Scotland. The Scottish Parliament was reconvened in Edinburgh on 4 July 1999. The first to hold the office of first minister of Scotland was Donald Dewar , who served until his sudden death in 2000. The Scottish Parliament Building at Holyrood opened in October 2004 after lengthy construction delays and running over budget. The Scottish Parliament's form of proportional representation (the additional member system ) resulted in no one party having an overall majority for
462-413: A battery (for example when pressing a telegraph key), the electric charge in the wire induces an opposite charge in the water as it travels along. In 1831, Faraday described this effect in what is now referred to as Faraday's law of induction . As the two charges attract each other, the exciting charge is retarded. The core acts as a capacitor distributed along the length of the cable which, coupled with
616-612: A distinctive Norse–Gaelic culture that saw many Old Norse loanwords enter the Scottish Gaelic spoken by islanders, and through successive generations the Norse would become almost completely assimilated into Gaelic culture and the Scottish clan system. After the conflict, Scotland had to affirm Norwegian sovereignty of the Northern Isles , but they were later integrated into Scotland in
770-569: A full legal union be sought instead, a proposal to which the Scots Parliament would not assent, causing the king to withdraw the plan. Except for a short period under the Protectorate , Scotland remained a separate state in the 17th century, but there was considerable conflict between the crown and the Covenanters over the form of church government . The military was strengthened, allowing
924-449: A gain of +33dBm, however again the amount of power that can be fed into the fiber is limited. In single carrier configurations the dominating limitation is self phase modulation induced by the Kerr effect which limits the amplification to +18 dBm per fiber. In WDM configurations the limitation due to crossphase modulation becomes predominant instead. Optical pre-amplifiers are often used to negate
1078-530: A group of raiders adopting a name from an Indo-European root , * skot , citing the parallel in Greek skotos ( σκότος ), meaning "darkness, gloom". The Late Latin word Scotia ("land of the Gaels") was initially used to refer to Ireland, and likewise in early Old English Scotland was used for Ireland. By the 11th century at the latest, Scotia was being used to refer to (Gaelic-speaking) Scotland north of
1232-421: A handful of hours. The first attempt at laying a transatlantic telegraph cable was promoted by Cyrus West Field , who persuaded British industrialists to fund and lay one in 1858. However, the technology of the day was not capable of supporting the project; it was plagued with problems from the outset, and was in operation for only a month. Subsequent attempts in 1865 and 1866 with the world's largest steamship,
1386-578: A letter addressed to Adolf Hitler that detailed his intentions to open peace negotiations with the British. Pintsch delivered the letter to Hitler at the Berghof around noon on 11 May. Albert Speer later said Hitler described Hess's departure as one of the worst personal blows of his life, as he considered it a personal betrayal. Hitler worried that his allies, Italy and Japan, would perceive Hess's act as an attempt by Hitler to secretly open peace negotiations with
1540-683: A machine in 1837 for covering wires with silk or cotton thread that he developed into a wire wrapping capability for submarine cable with a factory in 1857 that became W.T. Henley's Telegraph Works Co., Ltd. The India Rubber, Gutta Percha and Telegraph Works Company , established by the Silver family and giving that name to a section of London , furnished cores to Henley's as well as eventually making and laying finished cable. In 1870 William Hooper established Hooper's Telegraph Works to manufacture his patented vulcanized rubber core, at first to furnish other makers of finished cable, that began to compete with
1694-402: A number of Scottish-born authors achieved international reputations, such as Robert Louis Stevenson , Arthur Conan Doyle , J. M. Barrie and George MacDonald . Scotland also played a major part in the development of art and architecture. The Glasgow School , which developed in the late 19th century, and flourished in the early 20th century, produced a distinctive blend of influences including
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#17328476405051848-460: A population of 4.8 million in 1911, Scotland sent over half a million men to the war, of whom over a quarter died in combat or from disease, and 150,000 were seriously wounded. Field Marshal Sir Douglas Haig was Britain's commander on the Western Front. The war saw the emergence of a radical movement called " Red Clydeside " led by militant trades unionists. Formerly a Liberal stronghold,
2002-428: A public dispute with William Thomson . Whitehouse believed that, with enough voltage, any cable could be driven. Thomson believed that his law of squares showed that retardation could not be overcome by a higher voltage. His recommendation was a larger cable. Because of the excessive voltages recommended by Whitehouse, Cyrus West Field's first transatlantic cable never worked reliably, and eventually short circuited to
2156-415: A pump laser light to be transmitted alongside the data carried by the cable; the pump light and the data are often transmitted in physically separate fibers. The ROPA contains a doped fiber that uses the pump light (often a 1480 nm laser light) to amplify the data signals carried on the rest of the fibers. WDM or wavelength division multiplexing was first implemented in submarine fiber optic cables from
2310-408: A single fiber using wavelength division multiplexing (WDM), which allows for multiple optical carrier channels to be transmitted through a single fiber, each carrying its own information. WDM is limited by the optical bandwidth of the amplifiers used to transmit data through the cable and by the spacing between the frequencies of the optical carriers; however this minimum spacing is also limited, with
2464-407: A solid-state optical amplifier , usually an erbium-doped fiber amplifier (EDFA). Each repeater contains separate equipment for each fiber. These comprise signal reforming, error measurement and controls. A solid-state laser dispatches the signal into the next length of fiber. The solid-state laser excites a short length of doped fiber that itself acts as a laser amplifier. As the light passes through
2618-405: A submarine cable can have a major impact in its capacity. SDM is combined with DWDM to improve capacity. The open cable concept allows for the design of a submarine cable independently of the transponders that will be used to transmit data through the cable. SLTE (Submarine Line Terminal Equipment) has transponders and a ROADM ( Reconfigurable optical add-drop multiplexer ) used for handling
2772-475: A typical multi-terabit, transoceanic submarine cable system costs several hundred million dollars to construct. As a result of these cables' cost and usefulness, they are highly valued not only by the corporations building and operating them for profit, but also by national governments. For instance, the Australian government considers its submarine cable systems to be "vital to the national economy". Accordingly,
2926-464: A wire, insulated with tarred hemp and India rubber , in the water of New York Harbor , and telegraphed through it. The following autumn, Wheatstone performed a similar experiment in Swansea Bay . A good insulator to cover the wire and prevent the electric current from leaking into the water was necessary for the success of a long submarine line. India rubber had been tried by Moritz von Jacobi ,
3080-673: Is 30,977 square miles (80,231 km ) with a land area of 30,078 square miles (77,901 km ), comparable to the size of the Czech Republic . Scotland's only land border is with England, and runs for 96 miles (154 km) between the basin of the River Tweed on the east coast and the Solway Firth in the west. The Atlantic Ocean borders the west coast and the North Sea is to the east. The island of Ireland lies only 13 miles (21 km) from
3234-650: Is broadly divided into three regions: the Highlands , a mountainous region in the north and north-west; the Lowlands , a flatter plain across the centre of the country; and the Southern Uplands , a hilly region along the southern border. The Highlands are the most mountainous region of the British Isles and contain its highest peak, Ben Nevis , at 4,413 feet (1,345 m). The region also contains many lakes, called lochs ;
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#17328476405053388-643: Is demonstrated by sites such as the Callanish Stones on Lewis and the Maes Howe on Orkney , which were built in the third millennium BC. The first written reference to Scotland was in 320 BC by Greek sailor Pytheas , who called the northern tip of Britain "Orcas", the source of the name of the Orkney islands. Most of modern Scotland was not incorporated into the Roman Empire , and Roman control over parts of
3542-609: Is echoed in the place names of Dunkeld , Rohallion , and Schiehallion . The Great Conspiracy constituted a seemingly coordinated invasion against Roman rule in Britain in the later 4th century, which included the participation of the Gaelic Scoti and the Caledonians, who were then known as Picts by the Romans. This was defeated by the comes Theodosius ; but Roman military government
3696-480: Is either not required, the capacity to the country is small enough to be backed up by other means, or having backup is regarded as too expensive. A further redundant-path development over and above the self-healing rings approach is the mesh network whereby fast switching equipment is used to transfer services between network paths with little to no effect on higher-level protocols if a path becomes inoperable. As more paths become available to use between two points, it
3850-586: Is less likely that one or two simultaneous failures will prevent end-to-end service. As of 2012, operators had "successfully demonstrated long-term, error-free transmission at 100 Gbps across Atlantic Ocean" routes of up to 6,000 km (3,700 mi), meaning a typical cable can move tens of terabits per second overseas. Speeds improved rapidly in the previous few years, with 40 Gbit/s having been offered on that route only three years earlier in August 2009. Switching and all-by-sea routing commonly increases
4004-595: Is limited, although this has increased over the years; in 2014 unrepeated cables of up to 380 kilometres (240 mi) in length were in service; however these require unpowered repeaters to be positioned every 100 km. The rising demand for these fiber-optic cables outpaced the capacity of providers such as AT&T. Having to shift traffic to satellites resulted in lower-quality signals. To address this issue, AT&T had to improve its cable-laying abilities. It invested $ 100 million in producing two specialized fiber-optic cable laying vessels. These included laboratories in
4158-672: Is said to have invested in the Darien scheme . After another proposal from the English House of Lords was rejected in 1695, and a further Lords motion was voted down in the House of Commons in 1700, the Parliament of Scotland again rejected union in 1702. The failure of the Darien Scheme bankrupted the landowners who had invested, though not the burghs. Nevertheless, the nobles' bankruptcy, along with
4312-453: Is the largest of the cities of Scotland . The Kingdom of Scotland emerged as an independent sovereign state in the 9th century. In 1603, James VI succeeded to the thrones of England and Ireland , forming a personal union of the three kingdoms . On 1 May 1707, Scotland and England combined to create the new Kingdom of Great Britain , with the Parliament of Scotland subsumed into
4466-670: Is too small to be commercially viable. Some have been used as scientific instruments to measure earthquake waves and other geomagnetic events. In 1942, Siemens Brothers of New Charlton , London, in conjunction with the United Kingdom National Physical Laboratory , adapted submarine communications cable technology to create the world's first submarine oil pipeline in Operation Pluto during World War II . Active fiber-optic cables may be useful in detecting seismic events which alter cable polarization. In
4620-525: Is typical of the north-west of Europe, although several of the larger mammals such as the lynx, brown bear, wolf, elk and walrus were hunted to extinction in historic times. There are important populations of seals and internationally significant nesting grounds for a variety of seabirds such as gannets . The golden eagle is something of a national icon. On the high mountain tops, species including ptarmigan , mountain hare and stoat can be seen in their white colour phase during winter months. Remnants of
4774-541: The Australian Communications and Media Authority (ACMA) has created protection zones that restrict activities that could potentially damage cables linking Australia to the rest of the world. The ACMA also regulates all projects to install new submarine cables. Submarine cables are important to the modern military as well as private enterprise. The US military , for example, uses the submarine cable network for data transfer from conflict zones to command staff in
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4928-727: The Bruce dynasty and their long-term rivals of the House of Comyn and House of Balliol lasted until the middle of the 14th century. Although the Bruce faction was successful, David II's lack of an heir allowed his half-nephew Robert II , the Lord High Steward of Scotland , to come to the throne and establish the House of Stewart . The Stewarts ruled Scotland for the remainder of the Middle Ages . The country they ruled experienced greater prosperity from
5082-586: The Caledonians and the Maeatae . Other ancient authors used the adjective "Caledonian" to mean anywhere in northern or inland Britain, often mentioning the region's people and animals, its cold climate, its pearls, and a noteworthy region of wooded hills ( Latin : saltus ) which the 2nd century AD Roman philosopher Ptolemy , in his Geography , described as being south-west of the Beauly Firth . The name Caledonia
5236-672: The Celtic Revival the Arts and Crafts movement , and Japonism , which found favour throughout the modern art world of continental Europe and helped define the Art Nouveau style. Proponents included architect and artist Charles Rennie Mackintosh . Scotland played a major role in the British effort in the First World War . It especially provided manpower, ships, machinery, fish and money. With
5390-570: The Community Charge (widely known as the Poll Tax) one year before the rest of Great Britain, contributed to a growing movement for Scottish control over domestic affairs. On 21 December 1988, Pan Am Flight 103 exploded mid–air over the town of Lockerbie , killing all on board as well as eleven Lockerbie residents. It remains the deadliest terrorist attack in the United Kingdom . Following
5544-662: The Crimean War various forms of telegraphy played a major role; this was a first. At the start of the campaign there was a telegraph link at Bucharest connected to London. In the winter of 1854 the French extended the telegraph link to the Black Sea coast. In April 1855 the British laid an underwater cable from Varna to the Crimean peninsula so that news of the Crimean War could reach London in
5698-580: The Hebrides , which had been ruled by various Scottish clans following the death of Somerled in 1164. In 1266, Scotland fought the short but consequential Scottish-Norwegian War which saw the reclamation of the Hebrides after the strong defeat of King Haakon IV and his forces at the Battle of Largs . Up until that point, the Hebrides had been under Norwegian Viking control for roughly 400 years and had developed
5852-625: The Highland Boundary Fault , which runs from Arran to Stonehaven . This part of Scotland largely comprises ancient rocks from the Cambrian and Precambrian , which were uplifted during the later Caledonian orogeny . It is interspersed with igneous intrusions of a more recent age, remnants of which formed mountain massifs such as the Cairngorms and Skye Cuillins . In north-eastern mainland Scotland weathering of rock that occurred before
6006-516: The House of Hanover from the British throne. The threat of the Jacobite movement to the United Kingdom and its monarchs effectively ended at the Battle of Culloden , Great Britain's last pitched battle . The passing of the Treaty of Union did not bring about immediate economic prosperity to Scotland as was widely speculated by the pamphleteer as a result of the little consideration given to prospects of
6160-553: The House of Stuart was resumed with the Restoration in Scotland in 1660. The Parliament of Scotland sought a commercial union with England in 1664; the proposal was rejected in 1668. In 1670 the Parliament of England rejected a proposed political union with Scotland. English proposals along the same lines were abandoned in 1674 and in 1685. The Scots Parliament rejected proposals for a political union with England in 1689. Jacobitism ,
6314-687: The Last Ice Age has shaped much of the landscape. A significant exception to the above are the fossil-bearing beds of Old Red Sandstones found principally along the Moray Firth coast. The Highlands are generally mountainous and the highest elevations in the British Isles are found here. Scotland has over 790 islands divided into four main groups: Shetland , Orkney , and the Inner Hebrides and Outer Hebrides . There are numerous bodies of freshwater including Loch Lomond and Loch Ness . Some parts of
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6468-464: The Mesolithic period . It is believed the first post-glacial groups of hunter-gatherers arrived in Scotland around 12,800 years ago, as the ice sheet retreated after the last glaciation . At the time, Scotland was covered in forests, had more bog-land, and the main form of transport was by water. These settlers began building the first known permanent houses on Scottish soil around 9,500 years ago, and
6622-793: The Moscow region in Russia , and the Kamchatka Peninsula on the opposite side of Eurasia . Temperatures are generally lower than in the rest of the UK, with the temperature of −27.2 °C (−17.0 °F) recorded at Braemar in the Grampian Mountains , on 11 February 1895, the coldest ever recorded anywhere in the UK. Winter maxima average 6 °C (43 °F) in the Lowlands, with summer maxima averaging 18 °C (64 °F). The highest temperature recorded
6776-668: The North Pacific Cable system was the first regenerative system (i.e., with repeaters ) to completely cross the Pacific from the US mainland to Japan. The US portion of NPC was manufactured in Portland, Oregon, from 1989 to 1991 at STC Submarine Systems, and later Alcatel Submarine Networks . The system was laid by Cable & Wireless Marine on the CS Cable Venture . Transatlantic cables of
6930-475: The Parliament of Great Britain , which succeeded both the Parliament of Scotland and the Parliament of England , which rejected proposals from the Parliament of Ireland that the third kingdom be incorporated in the union. Andrew Fletcher , a prominent Scottish patriot, argued that the ratification of the treaty would see Scotland "more like a conquered province", and by 1713, the former Lord Chancellor of Scotland , James Ogilvy, 4th Earl of Findlater , who
7084-415: The Parliament of Great Britain . In 1999, a Scottish Parliament was re-established, and has devolved authority over many areas of domestic policy . The country has its own distinct legal system , education system and religious history , which have all contributed to the continuation of Scottish culture and national identity . Scottish English and Scots are the most widely spoken languages in
7238-732: The Prussian electrical engineer , as far back as the early 19th century. Another insulating gum which could be melted by heat and readily applied to wire made its appearance in 1842. Gutta-percha , the adhesive juice of the Palaquium gutta tree, was introduced to Europe by William Montgomerie , a Scottish surgeon in the service of the British East India Company . Twenty years earlier, Montgomerie had seen whips made of gutta-percha in Singapore , and he believed that it would be useful in
7392-520: The Rhine between Deutz and Cologne . In 1849, Charles Vincent Walker , electrician to the South Eastern Railway , submerged 3 km (2 mi) of wire coated with gutta-percha off the coast from Folkestone , which was tested successfully. In August 1850, having earlier obtained a concession from the French government, John Watkins Brett 's English Channel Submarine Telegraph Company laid
7546-632: The River Forth , alongside Albania or Albany , both derived from the Gaelic Alba . The use of the words Scots and Scotland to encompass all of what is now Scotland became common in the Late Middle Ages . Prehistoric Scotland , before the arrival of the Roman Empire , was culturally divergent. Repeated glaciations, which covered the entire land mass of modern Scotland, destroyed any traces of human habitation that may have existed before
7700-409: The River Tay , flows for a distance of 117 miles (188 km). The whole of Scotland was covered by ice sheets during the Pleistocene ice ages and the landscape is much affected by glaciation. From a geological perspective, the country has three main sub-divisions: the Highlands and Islands, the Central Lowlands, and the Southern Uplands. The Highlands and Islands lie to the north and west of
7854-431: The Roman army in the Severan campaign were placed near those established by Agricola and were clustered at the mouths of the glens in the Highlands, the Caledonians were again in revolt in 210–211 and these were overrun. To the Roman historians Tacitus and Cassius Dio , the Scottish Highlands and the area north of the River Forth was called Caledonia . According to Cassius Dio, the inhabitants of Caledonia were
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#17328476405058008-616: The SS Great Eastern , used a more advanced technology and produced the first successful transatlantic cable. Great Eastern later went on to lay the first cable reaching to India from Aden, Yemen, in 1870. From the 1850s until 1911, British submarine cable systems dominated the most important market, the North Atlantic Ocean . The British had both supply side and demand side advantages. In terms of supply, Britain had entrepreneurs willing to put forth enormous amounts of capital necessary to build, lay and maintain these cables. In terms of demand, Britain's vast colonial empire led to business for
8162-416: The Scots Confession , which signalled the Scottish Reformation 's sharp break from papal authority and Roman Catholic teaching. The Catholic Mary, Queen of Scots, was forced to abdicate in 1567 . In 1603, James VI, King of Scots inherited the thrones of the Kingdom of England and the Kingdom of Ireland in the Union of the Crowns , and moved to London. This was a personal union as despite having
8316-441: The Wars of Scottish Independence , until Robert the Bruce was crowned king of Scotland in 1306. Victory at the Battle of Bannockburn in 1314 proved the Scots had regained control of their kingdom. In 1320 the world's first documented declaration of independence, the Declaration of Arbroath , won the support of Pope John XXII , leading to the legal recognition of Scottish sovereignty by the English Crown. A civil war between
8470-428: The beaver and wild boar . Today, much of the remaining native Caledonian Forest lies within the Cairngorms National Park and remnants of the forest remain at 84 locations across Scotland. On the west coast, remnants of ancient Celtic Rainforest remain, particularly on the Taynish peninsula in Argyll , these forests are particularly rare due to high rates of deforestation throughout Scottish history. The flora of
8624-400: The steel wire armouring gave pests a route to eat their way in. Damaged armouring, which was not uncommon, also provided an entrance. Cases of sharks biting cables and attacks by sawfish have been recorded. In one case in 1873, a whale damaged the Persian Gulf Cable between Karachi and Gwadar . The whale was apparently attempting to use the cable to clean off barnacles at a point where
8778-471: The 14th century is now a crown dependency outside of the United Kingdom; the island groups Orkney and Shetland , which were acquired from Norway in 1472; and Berwick-upon-Tweed , lost to England in 1482 The geographical centre of Scotland lies a few miles from the village of Newtonmore in Badenoch . Rising to 4,413 feet (1,345 m) above sea level, Scotland's highest point is the summit of Ben Nevis , in Lochaber , while Scotland's longest river,
8932-401: The 15th century. Scandinavian culture in the form of the Norn language survived for a lot longer than in the Hebrides, and would strongly influence the local Scots dialect on Shetland and Orkney . Later, a system of feudalism was consolidated, with both Anglo-Norman incomers and native Gaelic chieftains being granted land in exchange for serving the king. The relationship with England
9086-443: The 1980s, fiber-optic cables were developed. The first transatlantic telephone cable to use optical fiber was TAT-8 , which went into operation in 1988. A fiber-optic cable comprises multiple pairs of fibers. Each pair has one fiber in each direction. TAT-8 had two operational pairs and one backup pair. Except for very short lines, fiber-optic submarine cables include repeaters at regular intervals. Modern optical fiber repeaters use
9240-422: The 1990s to the 2000s, followed by DWDM or dense wavelength division mulltiplexing around 2007. Each fiber can carry 30 wavelengths at a time. SDM or spatial division multiplexing submarine cables have at least 12 fiber pairs which is an increase from the maximum of 8 pairs found in conventional submarine cables, and submarine cables with up to 24 fiber pairs have been deployed. The type of modulation employed in
9394-509: The 19th century consisted of an outer layer of iron and later steel wire, wrapping India rubber, wrapping gutta-percha , which surrounded a multi-stranded copper wire at the core. The portions closest to each shore landing had additional protective armour wires. Gutta-percha, a natural polymer similar to rubber, had nearly ideal properties for insulating submarine cables, with the exception of a rather high dielectric constant which made cable capacitance high. William Thomas Henley had developed
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#17328476405059548-415: The 1st century have been found as far north as the Moray Firth . By the reign of the Roman emperor Trajan ( r. 98–117 ), Roman control had lapsed to Britain south of a line between the River Tyne and the Solway Firth . Along this line, Trajan's successor Hadrian ( r. 117–138 ) erected Hadrian's Wall in northern England and the Limes Britannicus became the northern border of
9702-493: The British. After 1945, Scotland's economic situation worsened due to overseas competition, inefficient industry, and industrial disputes. Only in recent decades has the country enjoyed something of a cultural and economic renaissance. Economic factors contributing to this recovery included a resurgent financial services industry, electronics manufacturing , (see Silicon Glen ), and the North Sea oil and gas industry. The introduction in 1989 by Margaret Thatcher's government of
9856-402: The Pictish language went extinct as its speakers shifted to Gaelic. From a base in eastern Scotland north of the River Forth and south of the River Spey , the kingdom expanded first southwards, into the former Northumbrian lands, and northwards into Moray . Around the turn of the millennium, there was a centralization in agricultural lands and the first towns began to be established. In
10010-458: The Roman Empire. The Roman influence on the southern part of the country was considerable, and they introduced Christianity to Scotland. The Antonine Wall was built from 142 at the order of Hadrian's successor Antoninus Pius ( r. 138–161 ), defending the Roman part of Scotland from the unadministered part of the island, north of a line between the Firth of Clyde and the Firth of Forth . The Roman invasion of Caledonia 208–210
10164-405: The Scottish Enlightenment is traditionally considered to have concluded toward the end of the 18th century, disproportionately large Scottish contributions to British science and letters continued for another 50 years or more, thanks to such figures as the physicists James Clerk Maxwell and Lord Kelvin , and the engineers and inventors James Watt and William Murdoch , whose work was critical to
10318-423: The Scottish Parliament after the referendum, following cross-party talks in the Smith Commission . Since the 2014 referendum, events such as the UK leaving the European Union, despite a majority of voters in Scotland voting to remain a member, have led to calls for a second independence referendum . In 2022, the Lord Advocate Dorothy Bain argued the case for the Scottish Government to hold another referendum on
10472-401: The Scottish economy. Campaigners for the union between Scotland and England believed that there would be economic advantages to Scotland as a result of the failed Darien scheme which left the Kingdom of Scotland bankrupt. Eventually however, with trade tariffs with England abolished, trade blossomed, especially with Colonial America . The clippers belonging to the Glasgow Tobacco Lords were
10626-494: The Southern Uplands is Merrick with an elevation of 843 m (2,766 ft). The Southern Uplands is home to Scotland's highest village, Wanlockhead (430 m or 1,411 ft above sea level). The climate of most of Scotland is temperate and oceanic , and tends to be very changeable. As it is warmed by the Gulf Stream from the Atlantic, it has much milder winters (but cooler, wetter summers) than areas on similar latitudes, such as Labrador , southern Scandinavia ,
10780-455: The US mainland to Hawaii in 1902 and Guam to the Philippines in 1903. Canada, Australia, New Zealand and Fiji were also linked in 1902 with the trans-Pacific segment of the All Red Line . Japan was connected into the system in 1906. Service beyond Midway Atoll was abandoned in 1941 due to World War II, but the remainder stayed in operation until 1951 when the FCC gave permission to cease operations. The first trans-Pacific telephone cable
10934-460: The United States. Interruption of the cable network during intense operations could have direct consequences for the military on the ground. Almost all fiber-optic cables from TAT-8 in 1988 until approximately 1997 were constructed by consortia of operators. For example, TAT-8 counted 35 participants including most major international carriers at the time such as AT&T Corporation . Two privately financed, non-consortium cables were constructed in
11088-517: The archipelagos of the Hebrides and the Northern Isles . To the south-east, Scotland has its only land border , which is 96 miles (154 km) long and shared with England ; the country is surrounded by the Atlantic Ocean to the north and west, the North Sea to the north-east and east, and the Irish Sea to the south. The population in 2022 was 5,439,842. Edinburgh is the capital and Glasgow
11242-601: The area fluctuated over a rather short period. The first Roman incursion into Scotland was in 79 AD, when Agricola invaded Scotland; he defeated a Caledonian army at the Battle of Mons Graupius in 83 AD. After the Roman victory, Roman forts were briefly set along the Gask Ridge close to the Highland line , but by three years after the battle, the Roman armies had withdrawn to the Southern Uplands . Remains of Roman forts established in
11396-442: The army and navy, trade, economics, colonial enterprises and other areas across the nascent British Empire . Historian Neil Davidson notes "after 1746 there was an entirely new level of participation by Scots in political life, particularly outside Scotland." Davidson also states "far from being 'peripheral' to the British economy, Scotland – or more precisely, the Lowlands – lay at its core." The Scottish Reform Act 1832 increased
11550-466: The cable companies from news agencies, trading and shipping companies, and the British government. Many of Britain's colonies had significant populations of European settlers, making news about them of interest to the general public in the home country. British officials believed that depending on telegraph lines that passed through non-British territory posed a security risk, as lines could be cut and messages could be interrupted during wartime. They sought
11704-456: The cable descended over a steep drop. The unfortunate whale got its tail entangled in loops of cable and drowned. The cable repair ship Amber Witch was only able to winch up the cable with difficulty, weighed down as it was with the dead whale's body. Early long-distance submarine telegraph cables exhibited formidable electrical problems. Unlike modern cables, the technology of the 19th century did not allow for in-line repeater amplifiers in
11858-442: The cable, which permitted design of the equipment for accurate telegraphy. The effects of atmospheric electricity and the geomagnetic field on submarine cables also motivated many of the early polar expeditions . Thomson had produced a mathematical analysis of propagation of electrical signals into telegraph cables based on their capacitance and resistance, but since long submarine cables operated at slow rates, he did not include
12012-510: The cable. Large voltages were used to attempt to overcome the electrical resistance of their tremendous length but the cables' distributed capacitance and inductance combined to distort the telegraph pulses in the line, reducing the cable's bandwidth , severely limiting the data rate for telegraph operation to 10–12 words per minute . As early as 1816, Francis Ronalds had observed that electric signals were slowed in passing through an insulated wire or core laid underground, and outlined
12166-535: The cables in maintaining administrative communications with governors throughout its empire, as well as in engaging other nations diplomatically and communicating with its military units in wartime. The geographic location of British territory was also an advantage as it included both Ireland on the east side of the Atlantic Ocean and Newfoundland in North America on the west side, making for the shortest route across
12320-401: The cause to be induction, using the analogy of a long Leyden jar . The same effect was noticed by Latimer Clark (1853) on cores immersed in water, and particularly on the lengthy cable between England and The Hague. Michael Faraday showed that the effect was caused by capacitance between the wire and the earth (or water) surrounding it. Faraday had noticed that when a wire is charged from
12474-611: The central belt of the country. Perhaps the most significant air raid in Scotland was the Clydebank Blitz of March 1941, which intended to destroy naval shipbuilding in the area. 528 people were killed and 4,000 homes totally destroyed. Perhaps Scotland's most unusual wartime episode occurred in 1941 when Rudolf Hess flew to Renfrewshire, possibly intending to broker a peace deal through the Duke of Hamilton . Before his departure from Germany, Hess had given his adjutant, Karlheinz Pintsch ,
12628-451: The coastline consist of machair , a low-lying dune pasture land. The Central Lowlands is a rift valley mainly comprising Paleozoic formations. Many of these sediments have economic significance for it is here that the coal and iron-bearing rocks that fuelled Scotland's industrial revolution are found. This area has also experienced intense volcanism, Arthur's Seat in Edinburgh being
12782-428: The country , existing on a dialect continuum with each other. Scottish Gaelic speakers can be found all over Scotland, however the language is largely spoken natively by communities within the Hebrides . The number of Gaelic speakers numbers less than 2% of the total population, though state-sponsored revitalisation attempts have led to a growing community of second language speakers. The mainland of Scotland
12936-444: The country is varied incorporating both deciduous and coniferous woodland as well as moorland and tundra species. Large-scale commercial tree planting and management of upland moorland habitat for the grazing of sheep and field sport activities like deer stalking and driven grouse shooting impacts the distribution of indigenous plants and animals. The UK's tallest tree is a grand fir planted beside Loch Fyne , Argyll in
13090-662: The creation of a worldwide network within the empire, which became known as the All Red Line , and conversely prepared strategies to quickly interrupt enemy communications. Britain's very first action after declaring war on Germany in World War I was to have the cable ship Alert (not the CS Telconia as frequently reported) cut the five cables linking Germany with France, Spain and the Azores, and through them, North America. Thereafter,
13244-440: The current at 10,000VDC is up to 1,650mA. Hence the total amount of power sent into the cable is often up to 16.5 kW. The optic fiber used in undersea cables is chosen for its exceptional clarity, permitting runs of more than 100 kilometres (62 mi) between repeaters to minimize the number of amplifiers and the distortion they cause. Unrepeated cables are cheaper than repeated cables and their maximum transmission distance
13398-434: The current generation with one end providing a positive voltage and the other a negative voltage. A virtual earth point exists roughly halfway along the cable under normal operation. The amplifiers or repeaters derive their power from the potential difference across them. The voltage passed down the cable is often anywhere from 3000 to 15,000VDC at a current of up to 1,100mA, with the current increasing with decreasing voltage;
13552-402: The data traffic that is crossing oceans is carried by undersea cables. The reliability of submarine cables is high, especially when (as noted above) multiple paths are available in the event of a cable break. Also, the total carrying capacity of submarine cables is in the terabits per second, while satellites typically offer only 1,000 megabits per second and display higher latency . However,
13706-448: The deep-sea sections which comprise the majority of the run, although larger and heavier cables are used for shallow-water sections near shore. After William Cooke and Charles Wheatstone had introduced their working telegraph in 1839, the idea of a submarine line across the Atlantic Ocean began to be thought of as a possible triumph of the future. Samuel Morse proclaimed his faith in it as early as 1840, and in 1842, he submerged
13860-412: The development of submarine branching units (SBUs), more than one destination could be served by a single cable system. Modern cable systems now usually have their fibers arranged in a self-healing ring to increase their redundancy, with the submarine sections following different paths on the ocean floor . One reason for this development was that the capacity of cable systems had become so large that it
14014-438: The distance and thus the round trip latency by more than 50%. For example, the round trip delay (RTD) or latency of the fastest transatlantic connections is under 60 ms, close to the theoretical optimum for an all-sea route. While in theory, a great circle route (GCP) between London and New York City is only 5,600 km (3,500 mi), this requires several land masses ( Ireland , Newfoundland , Prince Edward Island and
14168-400: The effects of inductance. By the 1890s, Oliver Heaviside had produced the modern general form of the telegrapher's equations , which included the effects of inductance and which were essential to extending the theory of transmission lines to the higher frequencies required for high-speed data and voice. While laying a transatlantic telephone cable was seriously considered from the 1920s,
14322-631: The end of the 14th century through the Scottish Renaissance to the Reformation , despite the effects of the Black Death in 1349 and increasing division between Highlands and Lowlands . Multiple truces reduced warfare on the southern border. The Treaty of Perpetual Peace was signed in 1502 by James IV of Scotland and Henry VII of England . James married Henry's daughter, Margaret Tudor . James invaded England in support of France under
14476-703: The execution of the Scottish king at Whitehall in 1649, amid the Wars of the Three Kingdoms and its events in Scotland , Oliver Cromwell , the victorious Lord Protector , imposed the British Isles' first written constitution – the Instrument of Government – on Scotland in 1652 as part of the republican Commonwealth of England, Scotland, and Ireland . The Protectorate Parliament was the first Westminster parliament to include representatives nominally from Scotland. The monarchy of
14630-415: The fabrication of surgical apparatus. Michael Faraday and Wheatstone soon discovered the merits of gutta-percha as an insulator, and in 1845, the latter suggested that it should be employed to cover the wire which was proposed to be laid from Dover to Calais . In 1847 William Siemens , then an officer in the army of Prussia, laid the first successful underwater cable using gutta percha insulation, across
14784-426: The family unit and had sharp divisions in wealth, although the vast majority were poor and worked full-time in subsistence agriculture . The Picts kept slaves (mostly captured in war) through the ninth century. Gaelic influence over Pictland and Northumbria was facilitated by the large number of Gaelic-speaking clerics working as missionaries. Operating in the sixth century on the island of Iona , Saint Columba
14938-739: The fastest ships on the route to Virginia . Until the American War of Independence in 1776, Glasgow was the world's premier tobacco port, dominating world trade. The disparity between the wealth of the merchant classes of the Scottish Lowlands and the ancient clans of the Scottish Highlands grew, amplifying centuries of division. In the Highlands, clan chiefs gradually started to think of themselves more as commercial landlords than leaders of their people. These social and economic changes included
15092-444: The fiber, it is amplified. This system also permits wavelength-division multiplexing , which dramatically increases the capacity of the fiber. EDFA amplifiers were first used in submarine cables in 1995. Repeaters are powered by a constant direct current passed down the conductor near the centre of the cable, so all repeaters in a cable are in series. Power feed equipment is installed at the terminal stations. Typically both ends share
15246-538: The first instant telecommunications links between continents, such as the first transatlantic telegraph cable which became operational on 16 August 1858. Submarine cables first connected all the world's continents (except Antarctica ) when Java was connected to Darwin, Northern Territory , Australia, in 1871 in anticipation of the completion of the Australian Overland Telegraph Line in 1872 connecting to Adelaide, South Australia and thence to
15400-533: The first line across the English Channel , using the converted tugboat Goliath . It was simply a copper wire coated with gutta-percha , without any other protection, and was not successful. However, the experiment served to secure renewal of the concession, and in September 1851, a protected core, or true, cable was laid by the reconstituted Submarine Telegraph Company from a government hulk , Blazer , which
15554-647: The first phase of the Highland Clearances and, ultimately, the demise of clanship. The Scottish Enlightenment and the Industrial Revolution turned Scotland into an intellectual, commercial and industrial powerhouse — so much so Voltaire said "We look to Scotland for all our ideas of civilisation." With the demise of Jacobitism and the advent of the Union, thousands of Scots, mainly Lowlanders, took up numerous positions of power in politics, civil service,
15708-666: The first three Scottish parliament elections. The pro- independence Scottish National Party led by Alex Salmond achieved an overall majority in the 2011 election , winning 69 of the 129 seats available. The success of the SNP in achieving a majority in the Scottish Parliament paved the way for the September 2014 referendum on Scottish independence . The majority voted against the proposition, with 55% voting no to independence. More powers, particularly concerning taxation, were devolved to
15862-403: The first villages around 6,000 years ago. The well-preserved village of Skara Brae on the mainland of Orkney dates from this period. Neolithic habitation, burial, and ritual sites are particularly common and well preserved in the Northern Isles and Western Isles , where a lack of trees led to most structures being built of local stone. Evidence of sophisticated pre-Christian belief systems
16016-415: The gutta-percha cores. The company later expanded into complete cable manufacture and cable laying, including the building of the first cable ship specifically designed to lay transatlantic cables. Gutta-percha and rubber were not replaced as a cable insulation until polyethylene was introduced in the 1930s. Even then, the material was only available to the military and the first submarine cable using it
16170-414: The imposition of royal authority on the western Highland clans. The 1609 Statutes of Iona compelled the cultural integration of Hebridean clan leaders. In 1641 and again in 1643, the Parliament of Scotland unsuccessfully sought a union with England which was "federative" and not "incorporating", in which Scotland would retain a separate parliament. The issue of union split the parliament in 1648. After
16324-756: The industrial districts switched to Labour by 1922, with a base among the Irish Catholic working-class districts. Women were especially active in building neighbourhood solidarity on housing issues. The "Reds" operated within the Labour Party with little influence in Parliament and the mood changed to passive despair by the late 1920s. During the Second World War, Scotland was targeted by Nazi Germany largely due to its factories, shipyards, and coal mines. Cities such as Glasgow and Edinburgh were targeted by German bombers, as were smaller towns mostly located in
16478-605: The issue, with the Supreme Court later ruling against the argument. Following the Supreme Court decision, the Scottish Government stated that it wished to make amendments to the Scotland Act 1998 that would allow a referendum to be held in 2023. The mainland of Scotland comprises the northern third of the land mass of the island of Great Britain, which lies off the northwest coast of Continental Europe . The total area
16632-452: The isthmus connecting New Brunswick to Nova Scotia ) to be traversed, as well as the extremely tidal Bay of Fundy and a land route along Massachusetts ' north shore from Gloucester to Boston and through fairly built up areas to Manhattan itself. In theory, using this partial land route could result in round trip times below 40 ms (which is the speed of light minimum time), and not counting switching. Along routes with less land in
16786-431: The late 1990s, which preceded a massive, speculative rush to construct privately financed cables that peaked in more than $ 22 billion worth of investment between 1999 and 2001. This was followed by the bankruptcy and reorganization of cable operators such as Global Crossing , 360networks , FLAG , Worldcom , and Asia Global Crossing. Tata Communications ' Global Network (TGN) is the only wholly owned fiber network circling
16940-633: The link from Dover to Ostend in Belgium, by the Submarine Telegraph Company. Meanwhile, the Electric & International Telegraph Company completed two cables across the North Sea , from Orford Ness to Scheveningen , the Netherlands. These cables were laid by Monarch , a paddle steamer which later became the first vessel with permanent cable-laying equipment. In 1858, the steamship Elba
17094-678: The mammoth globe-spanning Eastern Telegraph Company , owned by John Pender . A spin-off from Eastern Telegraph Company was a second sister company, the Eastern Extension, China and Australasia Telegraph Company, commonly known simply as "the Extension." In 1872, Australia was linked by cable to Bombay via Singapore and China and in 1876, the cable linked the British Empire from London to New Zealand. The first trans-Pacific cables providing telegraph service were completed in 1902 and 1903, linking
17248-549: The minimum spacing often being 50 GHz (0.4 nm). The use of WDM can reduce the maximum length of the cable although this can be overcome by designing equipment with this in mind. Optical post amplifiers, used to increase the strength of the signal generated by the optical transmitter often use a diode-pumped erbium-doped fiber laser. The diode is often a high power 980 or 1480 nm laser diode. This setup allows for an amplification of up to +24dBm in an affordable manner. Using an erbium-ytterbium doped fiber instead allows for
17402-405: The native Scots pine forest exist and within these areas the Scottish crossbill , the UK's only endemic bird species and vertebrate , can be found alongside capercaillie , Scottish wildcat , red squirrel and pine marten . Various animals have been re-introduced, including the white-tailed eagle in 1975, the red kite in the 1980s, and there have been experimental projects involving
17556-412: The ninth century, the Norse threat allowed a Gael named Kenneth I (Cináed mac Ailpín) to seize power over Pictland, establishing a royal dynasty to which the modern monarchs trace their lineage, and marking the beginning of the end of Pictish culture. The kingdom of Cináed and his descendants, called Alba, was Gaelic in character but existed on the same area as Pictland. By the end of the tenth century,
17710-458: The number of Scottish MPs and widened the franchise to include more of the middle classes. From the mid-century, there were increasing calls for Home Rule for Scotland and the post of Secretary of State for Scotland was revived. Towards the end of the century prime ministers of Scottish descent included William Gladstone , and the Earl of Rosebery . In the late 19th century the growing importance of
17864-474: The ocean when Whitehouse increased the voltage beyond the cable design limit. Thomson designed a complex electric-field generator that minimized current by resonating the cable, and a sensitive light-beam mirror galvanometer for detecting the faint telegraph signals. Thomson became wealthy on the royalties of these, and several related inventions. Thomson was elevated to Lord Kelvin for his contributions in this area, chiefly an accurate mathematical model of
18018-444: The ocean, which reduced costs significantly. A few facts put this dominance of the industry in perspective. In 1896, there were 30 cable-laying ships in the world, 24 of which were owned by British companies. In 1892, British companies owned and operated two-thirds of the world's cables and by 1923, their share was still 42.7 percent. During World War I , Britain's telegraph communications were almost completely uninterrupted, while it
18172-418: The only way Germany could communicate was by wireless, and that meant that Room 40 could listen in. The submarine cables were an economic benefit to trading companies, because owners of ships could communicate with captains when they reached their destination and give directions as to where to go next to pick up cargo based on reported pricing and supply information. The British government had obvious uses for
18326-435: The other pumping them at 1450 nm. Launching a pump frequency (pump laser light) at a power of just one watt leads to an increase in reach of 45 km or a 6-fold increase in capacity. Another way to increase the reach of a cable is by using unpowered repeaters called remote optical pre-amplifiers (ROPAs); these still make a cable count as unrepeatered since the repeaters do not require electrical power but they do require
18480-534: The planet. Scotland – in Europe (green & dark grey) – in the United Kingdom (green) Scotland ( Scots : Scotland ; Scottish Gaelic : Alba ) is a country that is part of the United Kingdom . It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjacent islands , principally in
18634-617: The political support for the exiled Catholic Stuart dynasty, remained a threat to the security of the British state under the Protestant House of Orange and the succeeding House of Hanover until the defeat of the Jacobite rising of 1745 . In 1698, the Company of Scotland attempted a project to secure a trading colony on the Isthmus of Panama . Almost every Scottish landowner who had money to spare
18788-632: The remnant of a once much larger volcano. This area is relatively low-lying, although even here hills such as the Ochils and Campsie Fells are rarely far from view. The Southern Uplands is a range of hills almost 125 miles (200 km) long, interspersed with broad valleys. They lie south of a second fault line (the Southern Uplands fault) that runs from Girvan to Dunbar . The geological foundations largely comprise Silurian deposits laid down some 400 to 500 million years ago. The high point of
18942-477: The resistance and inductance of the cable, limits the speed at which a signal travels through the conductor of the cable. Early cable designs failed to analyse these effects correctly. Famously, E.O.W. Whitehouse had dismissed the problems and insisted that a transatlantic cable was feasible. When he subsequently became chief electrician of the Atlantic Telegraph Company , he became involved in
19096-478: The rest of Australia. Subsequent generations of cables carried telephone traffic, then data communications traffic. These early cables used copper wires in their cores, but modern cables use optical fiber technology to carry digital data , which includes telephone, Internet and private data traffic. Modern cables are typically about 25 mm (1 in) in diameter and weigh around 1.4 tonnes per kilometre (2.5 short tons per mile; 2.2 long tons per mile) for
19250-462: The same monarch the kingdoms retained their separate parliaments, laws and other institutions. The first Union Jack was designed at James's behest, to be flown in addition to the St Andrew's Cross on Scots vessels at sea. James VI and I intended to create a single kingdom of Great Britain, but was thwarted in his attempt to do so by the Parliament of England , which supported the wrecking proposal that
19404-537: The ships for splicing cable and testing its electrical properties. Such field monitoring is important because the glass of fiber-optic cable is less malleable than the copper cable that had been formerly used. The ships are equipped with thrusters that increase maneuverability. This capability is important because fiber-optic cable must be laid straight from the stern, which was another factor that copper-cable-laying ships did not have to contend with. Originally, submarine cables were simple point-to-point connections. With
19558-562: The signals in the cable via software control. The ROADM is used to improve the reliability of the cable by allowing it to operate even if it has faults. This equipment is located inside a cable landing station (CLS). C-OTDR (Coherent Optical Time Domain Reflectometry) is used in submarine cables to detect the location of cable faults. The wet plant of a submarine cable comprises the cable itself, branching units, repeaters and possibly OADMs ( Optical add-drop multiplexers ). Currently 99% of
19712-594: The south-western peninsula of Kintyre ; Norway is 190 miles (305 km) to the northeast and the Faroe Islands , 168 miles (270 km) to the north. The territorial extent of Scotland is generally that established by the 1237 Treaty of York between Scotland and the Kingdom of England and the 1266 Treaty of Perth between Scotland and Norway. Important exceptions include the Isle of Man , which having been lost to England in
19866-476: The technological developments of the Industrial Revolution throughout Britain. In literature, the most successful figure of the mid-19th century was Walter Scott . His first prose work, Waverley in 1814, is often called the first historical novel. It launched a highly successful career that probably more than any other helped define and popularise Scottish cultural identity. In the late 19th century,
20020-601: The technology required for economically feasible telecommunications was not developed until the 1940s. A first attempt to lay a " pupinized " telephone cable—one with loading coils added at regular intervals—failed in the early 1930s due to the Great Depression . TAT-1 (Transatlantic No. 1) was the first transatlantic telephone cable system. Between 1955 and 1956, cable was laid between Gallanach Bay, near Oban , Scotland and Clarenville, Newfoundland and Labrador , in Canada. It
20174-502: The term is also applied to the many saltwater inlets along the country's deeply indented western coastline. The geography of the many islands is varied. Some, such as Mull and Skye , are noted for their mountainous terrain, while the likes of Tiree and Coll are much flatter. Scotland comes from Scoti , the Latin name for the Gaels . Philip Freeman has speculated on the likelihood of
20328-768: The terms of the Auld Alliance and became the last monarch in Great Britain to die in battle, at Flodden in 1513. The war with England during the minority years of Mary, Queen of Scots between 1543 and 1551 is known as the Rough Wooing . In 1560, the Treaty of Edinburgh brought an end to the Siege of Leith and recognized the Protestant Elizabeth I as Queen of England. The Parliament of Scotland met and immediately adopted
20482-441: The thermal noise of the receiver. Pumping the pre-amplifier with a 980 nm laser leads to a noise of at most 3.5 dB, with a noise of 5 dB usually obtained with a 1480 nm laser. The noise has to be filtered using optical filters. Raman amplification can be used to extend the reach or the capacity of an unrepeatered cable, by launching 2 frequencies into a single fiber; one carrying data signals at 1550 nm, and
20636-665: The threat of an English invasion, played a leading role in convincing the Scots elite to back a union with England. On 22 July 1706, the Treaty of Union was agreed between representatives of the Scots Parliament and the Parliament of England . The following year, twin Acts of Union were passed by both parliaments to create the united Kingdom of Great Britain with effect from 1 May 1707 with popular opposition and anti-union riots in Edinburgh , Glasgow , and elsewhere. The union also created
20790-690: The twelfth and thirteenth centuries, much of Scotland was under the control of a single ruler. Initially, Gaelic culture predominated, but immigrants from France, England and Flanders steadily created a more diverse society, with the Gaelic language starting to be replaced by Scots; and a modern nation-state emerged from this. At the end of this period, war against England started the growth of a Scottish national consciousness . David I (1124–1153) and his successors centralised royal power and united mainland Scotland, capturing regions such as Moray, Galloway , and Caithness , although he could not extend his power over
20944-517: The way, round trip times can approach speed of light minimums in the long term. The type of optical fiber used in unrepeated and very long cables is often PCSF (pure silica core) due to its low loss of 0.172 dB per kilometer when carrying a 1550 nm wavelength laser light. The large chromatic dispersion of PCSF means that its use requires transmission and receiving equipment designed with this in mind; this property can also be used to reduce interference when transmitting multiple channels through
21098-418: The wettest, with annual rainfall in a few places exceeding 3,000 mm (120 in). In comparison, much of lowland Scotland receives less than 800 mm (31 in) annually. Heavy snowfall is not common in the lowlands, but becomes more common with altitude. Braemar has an average of 59 snow days per year, while many coastal areas average fewer than 10 days of lying snow per year. Scotland's wildlife
21252-488: The wooden sailing vessels of both the merchant fleets and the battle fleets of the world. It became the world's pre-eminent shipbuilding centre. The industrial developments, while they brought work and wealth, were so rapid that housing, town planning, and provision for public health did not keep pace with them, and for a time living conditions in some of the towns and cities were notoriously bad, with overcrowding, high infant mortality, and growing rates of tuberculosis. While
21406-840: The working classes was marked by Keir Hardie 's success in the Mid Lanarkshire by-election, 1888 , leading to the foundation of the Scottish Labour Party , which was absorbed into the Independent Labour Party in 1895, with Hardie as its first leader. Glasgow became one of the largest cities in the world and known as "the Second City of the Empire " after London. After 1860, the Clydeside shipyards specialised in steamships made of iron (after 1870, made of steel), which rapidly replaced
21560-564: Was 35.1 °C (95.2 °F) at Floors Castle , Scottish Borders on 19 July 2022. The west of Scotland is usually warmer than the east, owing to the influence of Atlantic ocean currents and the colder surface temperatures of the North Sea . Tiree , in the Inner Hebrides, is one of the sunniest places in the country: it had more than 300 hours of sunshine in May 1975. Rainfall varies widely across Scotland. The western highlands of Scotland are
21714-445: Was a prominent supporter for the Treaty of Union between Scotland and England had changed his position on the treaty, and unsuccessfully advocated for the treaty to be reversed. The deposed Jacobite Stuart claimants had remained popular in the Highlands and north-east, particularly among non- Presbyterians , including Roman Catholics and Episcopalian Protestants . Two major Jacobite risings launched in 1715 and 1745 failed to remove
21868-634: Was able to quickly cut Germany's cables worldwide. Throughout the 1860s and 1870s, British cable expanded eastward, into the Mediterranean Sea and the Indian Ocean. An 1863 cable to Bombay (now Mumbai ), India, provided a crucial link to Saudi Arabia . In 1870, Bombay was linked to London via submarine cable in a combined operation by four cable companies, at the behest of the British Government. In 1872, these four companies were combined to form
22022-538: Was complex during this period: Scottish kings tried several times, sometimes with success, to exploit English political turmoil, followed by the longest period of peace between Scotland and England in the mediaeval period: from 1217–1296. The death of Alexander III in March 1286 broke the succession line of Scotland's kings. Edward I of England arbitrated between various claimants for the Scottish crown. In return for surrendering Scotland's nominal independence, John Balliol
22176-548: Was inaugurated on September 25, 1956, initially carrying 36 telephone channels. In the 1960s, transoceanic cables were coaxial cables that transmitted frequency-multiplexed voiceband signals . A high-voltage direct current on the inner conductor powered repeaters (two-way amplifiers placed at intervals along the cable). The first-generation repeaters remain among the most reliable vacuum tube amplifiers ever designed. Later ones were transistorized. Many of these cables are still usable, but have been abandoned because their capacity
22330-772: Was laid from Hawaii to Japan in 1964, with an extension from Guam to The Philippines. Also in 1964, the Commonwealth Pacific Cable System (COMPAC), with 80 telephone channel capacity, opened for traffic from Sydney to Vancouver, and in 1967, the South East Asia Commonwealth (SEACOM) system, with 160 telephone channel capacity, opened for traffic. This system used microwave radio from Sydney to Cairns (Queensland), cable running from Cairns to Madang ( Papua New Guinea ), Guam , Hong Kong , Kota Kinabalu (capital of Sabah , Malaysia), Singapore , then overland by microwave radio to Kuala Lumpur . In 1991,
22484-654: Was not laid until 1945 during World War II across the English Channel . In the 1920s, the American military experimented with rubber-insulated cables as an alternative to gutta-percha, since American interests controlled significant supplies of rubber but did not have easy access to gutta-percha manufacturers. The 1926 development by John T. Blake of deproteinized rubber improved the impermeability of cables to water. Many early cables suffered from attack by sea life. The insulation could be eaten, for instance, by species of Teredo (shipworm) and Xylophaga . Hemp laid between
22638-425: Was not possible to completely back up a cable system with satellite capacity, so it became necessary to provide sufficient terrestrial backup capability. Not all telecommunications organizations wish to take advantage of this capability, so modern cable systems may have dual landing points in some countries (where back-up capability is required) and only single landing points in other countries where back-up capability
22792-399: Was one of the earliest and best-known missionaries. The Vikings began to raid Scotland in the eighth century. Although the raiders sought slaves and luxury items, their main motivation was to acquire land. The oldest Norse settlements were in northwest Scotland, but they eventually conquered many areas along the coast. Old Norse entirely displaced Pictish in the Northern Isles . In
22946-424: Was pronounced king in 1292. In 1294, Balliol and other Scottish lords refused Edward's demands to serve in his army against the French. Scotland and France sealed a treaty on 23 October 1295, known as the Auld Alliance . War ensued, and John was deposed by Edward who took personal control of Scotland. Andrew Moray and William Wallace initially emerged as the principal leaders of the resistance to English rule in
23100-420: Was scheduled to be ready for service in 2016. It will have cable landing points at: Submarine communications cable A submarine communications cable is a cable laid on the seabed between land-based stations to carry telecommunication signals across stretches of ocean and sea. The first submarine communications cables were laid beginning in the 1850s and carried telegraphy traffic, establishing
23254-552: Was towed across the Channel. In 1853, more successful cables were laid, linking Great Britain with Ireland , Belgium , and the Netherlands , and crossing The Belts in Denmark . The British & Irish Magnetic Telegraph Company completed the first successful Irish link on May 23 between Portpatrick and Donaghadee using the collier William Hutt . The same ship was used for
23408-438: Was undertaken by emperors of the imperial Severan dynasty in response to the breaking of a treaty by the Caledonians in 197, but permanent conquest of the whole of Great Britain was forestalled by Roman forces becoming bogged down in punishing guerrilla warfare and the death of the senior emperor Septimius Severus ( r. 193–211 ) at Eboracum ( York ) after he was taken ill while on campaign. Although forts erected by
23562-471: Was used to lay a telegraph cable from Jersey to Guernsey , on to Alderney and then to Weymouth , the cable being completed successfully in September of that year. Problems soon developed with eleven breaks occurring by 1860 due to storms, tidal and sand movements, and wear on rocks. A report to the Institution of Civil Engineers in 1860 set out the problems to assist in future cable-laying operations. In
23716-800: Was withdrawn from the island altogether by the early 5th century, resulting in the Anglo-Saxon settlement of Britain and the immigration of the Saxons to southeastern Scotland and the rest of eastern Great Britain. Beginning in the sixth century, the area that is now Scotland was divided into three areas: Pictland , a patchwork of small lordships in central Scotland; the Anglo-Saxon Kingdom of Northumbria , which had conquered southeastern Scotland; and Dál Riata , which included territory in western Scotland and northern Ireland, and spread Gaelic language and culture into Scotland. These societies were based on
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