The Swedish Accident Investigation Authority (SHK) has published its final report on the damage to the C-Lion 1 subsea cable in the Baltic Sea on 18 November 2024, concluding that it cannot determine whether the incident was the result of an accident or intentional sabotage.
The investigation focused on the Chinese bulk carrier Yi Peng 3, which was initially identified as having caused the damage.
While investigators from several neighbouring countries, including Sweden, were allowed to board the vessel, the SHK reported that the visit was time-constrained and that access to key evidence—such as surveillance footage and the vessel’s Voyage Data Recorder—was not granted.
Interviews with the crew were conducted in the presence of Chinese officials.
The SHK outlined two possible scenarios: one in which the anchor was deliberately released to damage seabed infrastructure, and another in which it detached due to improper security.
The report noted that certain technical details—such as the absence of damage to key anchor components—make the accidental scenario less likely, but acknowledged that neither hypothesis could be confirmed due to investigative limitations.
Under international maritime law, flag states typically lead investigations in international waters, though exceptions may apply in cases involving suspected criminal activity.
While some analysts have raised concerns about potential state-sponsored sabotage, officials from several European countries have indicated increasing confidence that the recent cable breaks were not the result of coordinated or intentional activity.
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Singaporean asset manager Keppel and Vietnam’s Sovico Group are in discussions to develop undersea fibre-optic cables aimed at boosting Southeast Asia’s data centre industry. The potential $150 million project would directly link Vietnam with Singapore, a critical regional hub for data infrastructure. However, talks remain fluid, with Keppel reportedly favouring a larger consortium-led project extending from Singapore to Japan, while Sovico supports a direct connection.
The discussions highlight Southeast Asia’s growing demand for AI services and internet capacity, with Vietnam planning 10 new submarine cables by 2030. These cables are also a focal point in the ongoing US-China tech rivalry, with the United States lobbying against the involvement of Chinese contractors, citing security concerns. US officials have reportedly briefed Sovico and other stakeholders on the risks of working with China’s HMN Technologies.
Vietnam, with a rapidly growing digital economy and a population nearing 100 million, currently relies on five undersea cable branches for global connectivity. Expanding its cable infrastructure is seen as key to establishing itself as a regional data hub, despite challenges like power shortages and stringent data regulations. Keppel and Sovico’s efforts, along with other planned projects, signal significant investment in the region’s digital future.
At the 79th annual UN General Assembly, 18 nations, including the United States, Australia, Canada, the European Union, and several Pacific nations, endorsed a joint statement addressing the security and resilience of undersea cable infrastructure. The statement highlights the indispensable role of these cables and underscores the pressing need to safeguard them against emerging threats, both natural and manufactured.
Earlier this year, undersea data cables in the Red Sea reportedly were damaged, and large parts of West and Central Africa were left without internet services in March 2024 because of failures on four of the fibre optic cables that run below the world’s ocean. The joint statement begins by acknowledging communications networks’ central role in modern society, with undersea cables being critical infrastructure for global data transmission.
The nations stress that the rapid expansion of undersea cable networks has led to greater interdependence among countries, making the protection of this infrastructure a priority. They advocate for adopting policies to ensure that the infrastructure remains efficient, secure, resilient, and redundant to mitigate risks posed by its vulnerability.
The joint statement outlines key principles for a unified global approach to securing undersea cable infrastructure, focusing on building resilient and secure systems while incorporating cybersecurity best practices. Nations highlighted the importance of promoting secure cable providers, improving government-industry coordination, providing transparent ownership, and emphasising careful planning to prevent disruptions. Additionally, they outlined the need to consider regular risk assessments and compliance with international laws.
The United States is pushing Vietnam to avoid using Chinese firm HMN Technologies in its plan to build 10 new undersea cables by 2030, amid concerns over national security and sabotage. Vietnam’s current cables, essential for global internet connectivity, have suffered repeated failures, prompting the government to prioritise new projects.
Washington is lobbying Hanoi to select more experienced and trusted suppliers for the cables, citing concerns about espionage and security threats linked to HMN Technologies, which the US views as associated with Chinese tech giant Huawei. The US has also raised concerns about possible sabotage of Vietnam’s current subsea cables.
Vietnamese authorities have remained open to working with Chinese firms, but United States officials have stressed that choosing HMN Tech could discourage American companies from investing in Vietnam. Meanwhile, Vietnam’s top telecoms company, Viettel, is already planning a cable with Singapore, bypassing disputed waters in the South China Sea.
The US and China are vying for influence in Vietnam as the Southeast Asian nation looks to expand its undersea cable infrastructure. Both countries are heavily invested in Vietnam, with subsea cables becoming a critical element in the broader US-China technology rivalry.
Undersea cables carry internet traffic across continents. They are part of the critical information infrastructure of the modern world.
Scientists started using these cables as a global network of sensors that monitor seismic and other changes at the seabed, previously beyond the reach of the scientific community.
As Wired indicated in the recent coverage
Where there’s cable, there’s potential data.
Undersea cables could also be used as early-warning tools for earthquakes and tsunami as they can detect any tectonic shifts on the seabed.
