The majority of today’s internet traffic is transmitted via undersea fiber-optic cables, rather than through satellites or overland networks. The National Bureau of Asian Research reports that over 97% of transoceanic telecommunications—including financial, voice, and internet data—are facilitated by these underwater cable systems. This is especially true in Asia, where many countries are separated by bodies of water, making these cables crucial for digital connectivity.
Undersea cables have come a long way from their origins as colonial-era telegraph lines. They have developed into high-capacity systems capable of transmitting terabits of data per second. Modern technologies, such as optical amplification and dense wavelength division multiplexing (DWDM), allow these cables to stretch thousands of kilometers across oceans.
These undersea cables, often referred to as digital “bridges,” are now jointly funded and operated by consortia of telecom firms, governments, and major tech companies. In managing these cables, these entities must balance commercial interests, abide by various regulations, and mitigate geopolitical risks.
Asia’s most significant subsea cables include the Asia-Africa-Europe 1 (AAE-1), Asia-America Gateway (AAG), Asia Pacific Gateway (APG), Asia Submarine-Cable Express (ASE), South-East Asia-Japan Cable 2 (SJC2), SEA-ME-WE 6, and the PEACE Cable. These cables link various Asian countries with each other and the rest of the world, providing high-capacity connectivity across continents.
Undersea cables are particularly crucial in Asia. Island nations, such as the Philippines and Indonesia, depend on these cables to connect to continental networks. Conversely, landlocked or peninsular states like Laos and Myanmar rely on terrestrial links that connect to undersea systems.
The expansion of undersea cable capacity and routes promotes digital inclusion, reduces latency, and improves connectivity for remote and rural communities. Research indicates that doubling the capacity of these cables can decrease internet prices in a country by 30-50%, enabling wider online access.
Submarine cables serve as the backbone of Asia’s digital regionalism. They facilitate the exchange of culture and knowledge across borders, enabling various professionals and creators to connect, learn, and collaborate with ease.
Moreover, these undersea cables highlight Asia’s growing digital interdependence. No country can thrive alone; data, trade, and communication freely cross borders, uniting societies. Much like physical bridges, submarine cables connect Asia beneath the ocean, enabling the free flow of ideas and opportunities.
While undersea cables significantly enhance connectivity, they also come with their own set of challenges. If landing stations are monopolized or interconnection is gated, it may lead to the exclusion of certain actors such as small businesses or rural communities. Additionally, like physical bridges, submarine cables are vulnerable to sabotage, which could lead to significant disruptions in connectivity. Therefore, it is crucial to establish protective measures and governance to manage these risks.
What is the role of submarine cables in digital connectivity?
Submarine cables facilitate the majority of transoceanic telecommunications, including financial transactions, voice calls, and internet data. They play a crucial role in connecting different countries and enabling the exchange of information across continents.
How do submarine cables impact internet accessibility and costs?
Expanding undersea cable capacity can significantly reduce internet prices in a country, thereby enabling wider online access. However, monopolization can undermine these benefits.
What are the potential risks associated with submarine cables?
Potential risks include monopolization of landing stations, sabotage of cables, and the possibility of cables being used as political tools in disputed sea regions. Therefore, protective measures and governance are vital to manage these risks.
