Submarine Cable Off Taiwan Cut by Sunken Ship, Emergency Microwave Communications Activated

Submarine Cable Accidentally Severed by Sunken Ship

A critical submarine communications cable between Dongyin Island and Beigan Island in Taiwan's Lienchiang County was recently severed in an unexpected incident. Severe weather caused a long-sunken shipwreck to shift on the seabed, directly damaging this vital undersea communications line. Following the incident, authorities swiftly activated a backup microwave communications plan to maintain basic communications for local residents and military garrisons.

Dongyin and Beigan islands occupy an extremely sensitive geographic position, situated close to the Chinese mainland coastline and guarding the northern entrance to the Taiwan Strait. The islands reportedly host a significant Taiwanese military presence. The submarine cable serves not only as a lifeline for civilian communications but also carries critical strategic communications functions.

Microwave Communications Take Over Under Bandwidth Constraints

After the submarine cable was severed, the backup microwave communications system was quickly activated. While microwave communications can maintain basic voice and data transmission in the short term, its bandwidth is far lower than that of fiber-optic submarine cables and cannot support large-scale data transmission demands. For local residents, internet speed and stability will be significantly affected. For military units stationed on the islands, the degradation of high-bandwidth encrypted communications capability poses a security concern that cannot be overlooked.

Industry experts note that submarine cable repairs typically require specialized cable-laying vessels to travel to the affected waters, and the entire repair process can take weeks or even longer. In harsh weather conditions, the repair window is further compressed.

Prospects for AI Technology in Submarine Infrastructure Monitoring

This incident has once again exposed the vulnerability of global submarine communications infrastructure to public scrutiny. Approximately 95% of the world's intercontinental data transmission relies on submarine cables, and these cables face multiple threats including natural disasters, anchor drag, fishing activities, and shipwreck displacement as seen in this incident.

In recent years, multiple technology companies and research institutions have been exploring the use of AI technology to enhance submarine cable security monitoring capabilities. Key areas of focus include:

• Distributed Acoustic Sensing (DAS) Combined with AI Analysis: By integrating sensing capabilities into submarine cables, machine learning algorithms can identify abnormal vibrations and pressure changes around the cable in real time, providing early warnings of potential threats.
• Subsea Environment Digital Twins: Leveraging AI modeling technology to build digital twin systems of seabed terrain and ocean currents, simulating the potential impact of shipwrecks, geological changes, and other factors on cables to enable proactive risk assessment.
• Autonomous Underwater Vehicle (AUV) Inspections: Underwater robots equipped with AI-powered visual recognition systems can regularly patrol cable routes, automatically detecting hazards such as abrasion, suspension, and external damage.
• Predictive Maintenance Systems: Based on historical fault data and environmental parameters, AI models can predict weak points in cables and potential failure time windows, helping operators optimize maintenance schedules.

Industry giants such as Japan's NEC and France's Alcatel Submarine Networks have already invested R&D resources in related fields. Google has also previously disclosed that it is using AI to enhance the monitoring and management of its own submarine cable network.

Communications Resilience from a Geostrategic Perspective

From a geopolitical standpoint, the security of communications infrastructure around the Taiwan Strait has long been a focal point for all parties involved. Although this incident was caused by natural factors, it has also sparked discussions about whether submarine cables could become targets of deliberate attack during a conflict.

In recent years, multiple NATO countries have strengthened military patrols protecting submarine cables in the North Sea and Baltic Sea, while the Asia-Pacific region's protection systems in this regard still need improvement. Analysts believe that building a multi-layered, redundant communications assurance system — including submarine cables, microwave communications, satellite communications (such as low-Earth orbit constellations), and future AI-adaptive routing technology — will be a key direction for communications resilience in island regions.

Outlook: Intelligent Systems Are the Inevitable Path for Submarine Communications Security

This submarine cable disruption on Taiwan's outlying islands serves as both a real-world test of backup communications systems and a wake-up call for global submarine infrastructure management practices. As AI technology continues to make breakthroughs in sensing, prediction, and decision-making, deeply integrating intelligent monitoring and automated response into the full lifecycle management of submarine cables is no longer an "option" but a "necessity."

Against a backdrop of continuously exploding global data traffic and increasingly complex geopolitical situations, whoever can first achieve the intelligent upgrade of submarine communications infrastructure will gain the upper hand in future digital competition and security dynamics.