U.S. Funded Study for Thailand-U.S. Subsea Cable
The feasibility study marks a strategic effort to bypass the South China Sea for critical digital infrastructure.
Updated on Sept. 22, 2026 in Data Centers
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The U.S. Trade and Development Agency has funded a feasibility study for a multi-billion dollar subsea internet cable connecting Thailand to the United States. The proposed route is specifically designed to bypass the South China Sea.
Why it matters
The project reflects a broader push to insulate Southeast Asian digital infrastructure from Chinese networks by avoiding high-risk maritime routes. By bypassing the South China Sea, operators and insurers aim to mitigate the maintenance and political uncertainty that frequently plagues regional subsea connections.
The proposed cable is estimated to cost over $14 billion, significantly exceeding the $500 million price tag of a 2023 Chinese-developed fiber-optic network. The project aims to secure global internet traffic that relies on subsea cables for 99% of its data transmission.
The players
U.S. Trade and Development Agency
A federal agency that facilitates foreign economic development by funding infrastructure feasibility studies and early-stage project support.
National Telecom of Thailand
A state-owned telecommunications enterprise responsible for Thailand's domestic and international network infrastructure.
The details
The project is led by National Telecom of Thailand as part of an international consortium. It utilizes long-haul subsea fiber-optic technology, which relies on glass strands to transmit data as pulses of light across thousands of miles. By opting for a route that avoids the South China Sea, the cable design seeks to limit exposure to maintenance challenges and geopolitical instability that have historically impacted projects like the Pacific Light Cable Network.
Timeline
2009: Asia-America Gateway cable construction.
2015: Pacific Light Cable Network initiated.
2020: Washington blocked the U.S.-Hong Kong connection for the Pacific Light Cable Network.
2023: China developed a $500 million undersea fiber-optic cable network.
September 14, 2026: USTDA announced funding for the feasibility study.
The Tech Race
This project follows a pattern of digital sovereignty set by the 2020 blocking of the Pacific Light Cable Network. It demonstrates an intensifying competition to control the physical conduits of global internet traffic across the Indo-Pacific region.
While the project remains in the feasibility stage, its successful completion would potentially improve network redundancy and stability for data moving between Southeast Asia and the U.S. There is currently no definitive timeline for construction or commercial availability.
The takeaway
The project underscores the ongoing effort to harden international network routes against geopolitical friction. Observers should track the outcomes of this feasibility study to see if a viable route through Indonesia or Singapore can overcome the significant cost and logistical hurdles.
Further reading
For more on the infrastructure underpinning global traffic, visit our Data Centers section.
Source note: This article includes information reported by Fortune.
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