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The All Red Line was a system of
electrical telegraph Electrical telegraphy is point-to-point distance communicating via sending electric signals over wire, a system primarily used from the 1840s until the late 20th century. It was the first electrical telecommunications system and the most wid ...
s that linked much of the
British Empire The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...
. It was inaugurated on 31 October 1902. The informal name derives from the common practice of colouring the territory of the British Empire red or pink on political maps.


Construction

The first transatlantic cable connected Ireland and
Newfoundland Newfoundland and Labrador is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region of Labrador, having a total size of . As of 2025 the population ...
in 1858, although it later failed. In 1866, the laid out a lasting link from
Waterville, County Kerry Waterville, historically known as Coirean (), is a village in County Kerry, Ireland, on the Iveragh Peninsula. The town is sited on a narrow isthmus, with Lough Currane on the east side of the town, and Ballinskelligs Bay on the west, and ...
and nearby
Valentia Island Valentia Island () is one of Republic of Ireland, Ireland's most westerly points. It lies in Dingle Bay off the Iveragh Peninsula in the southwest of County Kerry. It is linked to the mainland by the Maurice O'Neill Memorial Bridge at Portmagee ...
, in Ireland, to Heart's Content, Newfoundland. By 1870,
Suez Suez (, , , ) is a Port#Seaport, seaport city with a population of about 800,000 in north-eastern Egypt, located on the north coast of the Gulf of Suez on the Red Sea, near the southern terminus of the Suez Canal. It is the capital and largest c ...
was linked to
Bombay Mumbai ( ; ), also known as Bombay ( ; its official name until 1995), is the capital city of the Indian States and union territories of India, state of Maharashtra. Mumbai is the financial centre, financial capital and the list of cities i ...
, and from there to
Madras Chennai, also known as Madras ( its official name until 1996), is the capital and largest city of Tamil Nadu, the southernmost state of India. It is located on the Coromandel Coast of the Bay of Bengal. According to the 2011 Indian ce ...
,
Penang Penang is a Malaysian state located on the northwest coast of Peninsular Malaysia along the Strait of Malacca. It has two parts: Penang Island, where the capital city, George Town, is located, and Seberang Perai on the Malay Peninsula. Th ...
, and
Singapore Singapore, officially the Republic of Singapore, is an island country and city-state in Southeast Asia. The country's territory comprises one main island, 63 satellite islands and islets, and one outlying islet. It is about one degree ...
.
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
was linked to British telegraph cables directly in 1871, by extending a line from Singapore to
Port Darwin Port Darwin is the port in Darwin, Northern Territory, and is the most northerly port in Australia. The port has operated in a number of locations, including Stokes Hill Wharf, Cullen Bay, and East Arm Wharf. Since 2015, the port has bee ...
, although it ran through the Dutch territory of
Java Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...
. By 1872, messages could be sent direct from London to
Adelaide Adelaide ( , ; ) is the list of Australian capital cities, capital and most populous city of South Australia, as well as the list of cities in Australia by population, fifth-most populous city in Australia. The name "Adelaide" may refer to ei ...
and
Sydney Sydney is the capital city of the States and territories of Australia, state of New South Wales and the List of cities in Australia by population, most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Syd ...
. Australia was linked to
New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...
by cable in 1876. To complete the All Red Line, therefore, the final major cable laying project was the trans-
Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ...
section. A resolution supporting such a project was passed by the
First Colonial Conference The 1887 Colonial Conference met in London in 1887 on the occasion of Queen Victoria's Golden Jubilee. It was organised at the behest of the Imperial Federation League in hopes of creating closer ties between the colonies, the Dominion of Canada ...
in 1887 and more detailed plans were approved at the
1894 Colonial Conference The 1894 Colonial Conference was called by the government of Canada to continue discussion begun at the 1887 Colonial Conference on a proposal to lay a telegraph cable at the bottom of the Pacific Ocean to create a communications link between C ...
in Ottawa which was called specifically on the topic of the cable project. The "Pacific Cable Committee" was formed in 1896 to consider the proposal and in 1901 the Pacific Cable Board was formed with eight members: Three from Britain, two from Canada, two from Australia and one from New Zealand. Funding for the project was shared between the British, Canadian, New Zealand, New South Wales, Victorian and Queensland governments. In 1902 the ''Colonia'', a newly-built cable vessel, began laying the 8,000 tonnes of cable needed to complete the
Bamfield, British Columbia Bamfield is a community that is surrounded by Crown Land, First Nation Lands belonging to the Huu-ay-aht Nations, and portions of the Pacific Rim National Park, located on Barkley Sound, Vancouver Island in British Columbia, Canada. The commu ...
, to
Fanning Island Tabuaeran, also known as Fanning Island, is an atoll that is part of the Line Islands of the central Pacific Ocean and part of the island nation of Kiribati. The land area is , and the population in 2015 was 2,315. The maximum elevation is abou ...
section of the cable. The final cost was around £2 million. Originally, the British government felt the All Red system should have sea-landings only on British-controlled soil for security purposes. Due to this, Britain actively sought to acquire
Fanning Island Tabuaeran, also known as Fanning Island, is an atoll that is part of the Line Islands of the central Pacific Ocean and part of the island nation of Kiribati. The land area is , and the population in 2015 was 2,315. The maximum elevation is abou ...
(now
Tabuaeran Tabuaeran, also known as Fanning Island, is an atoll that is part of the Line Islands of the central Pacific Ocean and part of the island nation of Kiribati. The land area is , and the population in 2015 was 2,315. The maximum elevation is abou ...
in
Kiribati Kiribati, officially the Republic of Kiribati, is an island country in the Micronesia subregion of Oceania in the central Pacific Ocean. Its permanent population is over 119,000 as of the 2020 census, and more than half live on Tarawa. The st ...
) to use for a midpoint power regeneration / relay station between Western Canada and Australia on the trans-Pacific Ocean branch of the system.
Fanning Island Tabuaeran, also known as Fanning Island, is an atoll that is part of the Line Islands of the central Pacific Ocean and part of the island nation of Kiribati. The land area is , and the population in 2015 was 2,315. The maximum elevation is abou ...
was annexed to the British Empire in 1888.


Completion

The
Committee on Imperial Defence The Committee of Imperial Defence was an important ''ad hoc'' part of the Government of the United Kingdom and the British Empire from just after the Second Boer War until the start of the Second World War. It was responsible for research, and so ...
reported in 1911 that the All Red Line was complete. The network had so many redundancies that 49 cuts would be needed to isolate the United Kingdom; 15 for Canada; and 5 for South Africa. Many colonies such as South Africa and India also had many land lines. Britain also possessed the majority of the world's underwater-telegraph deployment and repair equipment and expertise, and a monopoly of the
gutta-percha Gutta-percha is a tree of the genus ''Palaquium'' in the family Sapotaceae, which is primarily used to create a high-quality latex of the same name. The material is rigid, naturally biologically Chemically inert, inert, resilient, electrically n ...
insulation for underwater lines. The 1911 report stated that the
Imperial Wireless Chain The Imperial Wireless Chain was a strategic international communications network of powerful long range radiotelegraphy stations, created by the British government to link the countries of the British Empire. The stations exchanged commercial a ...
should only be a "valuable reserve" to the All Red Line, because enemies could interrupt or intercept radio messages. Despite its great cost, the telegraph network succeeded in its purpose: British communications remained uninterrupted during the
First World War World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
, while Britain quickly succeeded in cutting Germany's worldwide network. The Pacific Cable Board laid a duplicate cable between Canada and New Zealand between 1923 and 1926, using the cable-laying ships ''Dominia'' and ''
Faraday Michael Faraday (; 22 September 1791 – 25 August 1867) was an English chemist and physicist who contributed to the study of electrochemistry and electromagnetism. His main discoveries include the principles underlying electromagnetic inducti ...
''.


Routes

Atlantic Ocean The Atlantic Ocean is the second largest of the world's five borders of the oceans, oceanic divisions, with an area of about . It covers approximately 17% of Earth#Surface, Earth's surface and about 24% of its water surface area. During the ...
stations *
Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
*
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
*
Newfoundland Newfoundland and Labrador is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region of Labrador, having a total size of . As of 2025 the population ...
*
Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
*
Saint Helena Saint Helena (, ) is one of the three constituent parts of Saint Helena, Ascension and Tristan da Cunha, a remote British overseas territory. Saint Helena is a volcanic and tropical island, located in the South Atlantic Ocean, some 1,874 km ...
*
Ascension Island Ascension Island is an isolated volcanic island, 7°56′ south of the Equator in the Atlantic Ocean, South Atlantic Ocean. It is about from the coast of Africa and from the coast of South America. It is governed as part of the British Overs ...
*
Barbados Barbados, officially the Republic of Barbados, is an island country in the Atlantic Ocean. It is part of the Lesser Antilles of the West Indies and the easternmost island of the Caribbean region. It lies on the boundary of the South American ...
*
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
stations *
Bamfield, British Columbia Bamfield is a community that is surrounded by Crown Land, First Nation Lands belonging to the Huu-ay-aht Nations, and portions of the Pacific Rim National Park, located on Barkley Sound, Vancouver Island in British Columbia, Canada. The commu ...
,
Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
*
Fanning Island Tabuaeran, also known as Fanning Island, is an atoll that is part of the Line Islands of the central Pacific Ocean and part of the island nation of Kiribati. The land area is , and the population in 2015 was 2,315. The maximum elevation is abou ...
, which was deserted until the telegraph relay station was established. *
Fiji Fiji, officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists of an archipelago of more than 330 islands—of which about ...
*
Hong Kong Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...
*
Norfolk Island Norfolk Island ( , ; ) is an States and territories of Australia, external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia, directly east of Australia's Evans Head, New South Wales, Evans Head and a ...
(branching to
New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...
and
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
) *
Southport Southport is a seaside resort, seaside town in the Metropolitan Borough of Sefton in Merseyside, England. It lies on the West Lancashire Coastal Plain, West Lancashire coastal plain and the east coast of the Irish Sea, approximately north of ...
,
Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...
,
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
(the Pacific Cable Station still exists and is heritage-listed)
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), ...
stations *
Cape Town Cape Town is the legislature, legislative capital city, capital of South Africa. It is the country's oldest city and the seat of the Parliament of South Africa. Cape Town is the country's List of municipalities in South Africa, second-largest ...
,
South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...
*
Durban Durban ( ; , from meaning "bay, lagoon") is the third-most populous city in South Africa, after Johannesburg and Cape Town, and the largest city in the Provinces of South Africa, province of KwaZulu-Natal. Situated on the east coast of South ...
,
South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...
* Keeling Islands (branching to
India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
and
Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...
) *
Mauritius Mauritius, officially the Republic of Mauritius, is an island country in the Indian Ocean, about off the southeastern coast of East Africa, east of Madagascar. It includes the main island (also called Mauritius), as well as Rodrigues, Ag ...
*
Perth Perth () is the list of Australian capital cities, capital city of Western Australia. It is the list of cities in Australia by population, fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth . The ...
,
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...


Commonwealth Telegraph Agreement

In the final years of the British Empire, with a number of states federated or close to independence, a treaty with clearer financial divisions, responsibilities, and governance was established that would eventually replace the Pacific Cable Board. A treaty ''Commonwealth Telegraph Agreement'' was signed between
Commonwealth nations The Commonwealth of Nations, often referred to as the British Commonwealth or simply the Commonwealth, is an International organization, international association of member states of the Commonwealth of Nations, 56 member states, the vast majo ...
in London, 1948 that formed the
Commonwealth Telecommunications Organisation The Commonwealth Telecommunications Organisation (CTO) traces to the British Empire's Pacific Cable Board in 1901, though in its current form, was created by international treaty, the ''Commonwealth Telegraphs Agreement'' between Commonwealth na ...
.


See also

* All-Red Route * Commonwealth Pacific Cable System * Electrical telegraphy in the United Kingdom


Footnotes


References


External links


Map of the 1902 lineA 1904 speech
by
Sandford Fleming Sir Sandford Fleming (January 7, 1827 – July 22, 1915) was a Scottish Canadian engineer and inventor. Born and raised in Scotland, he immigrated to colonial Canada at the age of 18. He promoted worldwide standard time zones, a prime meridian, ...
on the importance of an imperial cable system.
Gentlemen of the Cable Service
{{Authority control British Empire Telegraphy Transatlantic telecommunications