Chinese Vessel Activity Near Undersea Cables Raises Concerns

A Chinese research vessel has been positioned in proximity to undersea cables that link the U.S. with Taiwan and the Philippines. Analysts believe this is indicative of intelligence gathering operations. Windward, a maritime analysis platform, monitored the 200-foot China-flagged vessel moving slowly over the Pacific Light Cable Network in the Philippine Sea. This system spans 8,000 miles across the Pacific, transporting vital communications.

The vessel’s activity coincides with China’s ongoing pressure on Taiwan, a key trading partner for the U.S., and the producer of over 90 percent of the world’s cutting-edge microchips. Beijing asserts control over the island, aligning with its territory claims, and has kept the option of force for unification.

Chinese officials have denied any deliberate damage to undersea cables, countering accusations from Taiwan and Western countries pending investigation outcomes. Newsweek sought comments from Windward and the foreign ministries of China and Taiwan.

“Slow-speed movement over critical undersea infrastructure is one of the clearest behavioral signals in maritime intelligence,” Windward reported. “Cables don’t move. Vessels that hover over them get noticed.”

Submarine cables are responsible for about 99 percent of international internet traffic. Although the ship’s specific name and indicating MMSI were masked in the report, Windward mentioned the vessel had frequently operated in contested areas like the Paracel Islands, claimed by China and Vietnam, and the Spratly Islands, where the Philippines and other nations have territorial disputes. Additionally, the vessel’s operations extended to the Bay of Bengal and waters near Sri Lanka.

The geopolitical significance of the cable emerged in 2020 when U.S. regulators halted a planned Hong Kong connection because it posed national security risks, potentially exposing American data to Chinese intelligence. The project was later restructured to connect only the U.S., Taiwan, and the Philippines.

The Chinese government is believed to utilize civilian research vessels for gathering intelligence and conducting maritime surveys near neighboring countries. Data obtained by these vessels may be provided to the People’s Liberation Army under Beijing’s military-civil fusion approach.

Rising Tensions Over Taiwan

Chinese survey ships were previously linked to several recent cable disruptions, including presumed sabotage in the Baltic Sea and damage to cables near Taiwan. The appearance of a Chinese survey vessel over undersea cables coincides with elevated tensions between Beijing and Taipei.

China has intensified its pressure tactics against the Taiwan government, which is critical of Beijing, with frequent military sorties over the Taiwan Strait’s median line, and expanded coast guard patrols near the Kinmen Islands, held by Taiwan.

Since June, China has been sending coast guard and research vessels into waters east of Taiwan, which experts interpret as a strategy to normalize China’s presence in areas traditionally considered Taiwan’s strategic rear.