Chinese Vessel Activity Raises Concerns Over Undersea Cables

Maritime Observations Indicate Intelligence Gathering

A Chinese research vessel has been observed near undersea cables connecting the United States with Taiwan and the Philippines. Maritime analysts suggest this behavior aligns with intelligence-gathering operations. The 200-foot, China-flagged vessel was tracked by Windward, a maritime analysis platform, as it moved slowly over the Pacific Light Cable Network in the Philippine Sea. This cable system spans 8,000 miles across the Pacific.

The presence of the vessel occurs amidst ongoing Chinese pressure on Taiwan, a self-governing region and a key trading partner of the U.S. More than 90% of advanced microchips come from Taiwan. China claims the island as its territory and has not excluded using force for unification.

Chinese authorities deny allegations of intentional damage to undersea cables and accuse Taiwan and Western governments of premature conclusions before completing investigations. Newsweek sought comments from Windward and the foreign ministries of China and Taiwan via email.

Signs of Maritime Intelligence Operations

Windward notes that slow-speed movement over essential undersea infrastructure is a significant indicator of maritime intelligence activities. Submarine cables, which enable about 99% of global intercontinental internet traffic, remain stationary; thus, vessels hovering over them draw attention.

Though the ship’s specifics were obscured, Windward noted that the same vessel has repeatedly operated in contested regions such as the Paracel Islands and the Spratly Islands, as well as the Bay of Bengal and off Sri Lanka.

This cable became a geopolitical issue in 2020 when U.S. regulators blocked a proposed connection to Hong Kong due to concerns over potential exposure of American data to Chinese intelligence. The project was adjusted to connect the U.S., Taiwan, and the Philippines only.

China’s Tactics in Regional Maritime Zones

China is suspected of deploying civilian research vessels for intelligence purposes in neighboring maritime zones. Information from these vessels can be relayed to the People’s Liberation Army under China’s military-civil fusion policy.

Ongoing Pressure on Taiwan

Chinese vessels have been implicated in various cable incidents recently, including in the Baltic Sea and around Taiwan. The Chinese presence over undersea cables coincides with heightened tensions between Beijing and Taipei. China has intensified pressure on Taiwan’s government, conducting frequent military flights over the Taiwan Strait and expanding coast guard activities near the Kinmen Islands.

Since June, China has increased the deployment of coast guard and research vessels into waters east of Taiwan. Analysts believe this strategy aims to normalize China’s presence in areas traditionally seen as Taiwan’s strategic zone.