China Built 42-Ship Seabed Network for Submarine Warfare, Deploying Hundreds of Sensors
Updated
Updated · en.clickpetroleoegas.com.br · Jun 3
China Built 42-Ship Seabed Network for Submarine Warfare, Deploying Hundreds of Sensors
2 articles · Updated · en.clickpetroleoegas.com.br · Jun 3
Summary
Reuters found China used 42 research vessels over five years to map sensitive seabeds and support a “transparent ocean” surveillance network spanning the Pacific, Indian and Arctic oceans.
Hundreds of sensors, buoys and underwater systems were documented near Japan, the Philippines, Guam, India and Sri Lanka, gathering hydrographic data that can sharpen sonar, track submarines and guide seabed weapons or sensors.
Dong Fang Hong 3 repeatedly operated near Guam, Taiwan, Japan and the Strait of Malacca in 2024 and 2025, illustrating how university-run “scientific” missions overlapped with strategically vital naval corridors.
Shandong officials said in 2017 the project would support maritime defense and security, while a university researcher later pledged to turn oceanographic advances into new combat capabilities under China’s civil-military fusion model.
U.S. and Australian naval experts said the effort could erode a long-held American undersea advantage by helping China break beyond the First Island Chain and prepare the battlespace for future submarine conflict.
How can US submarines evade China's 'transparent ocean' surveillance network?
Is China preparing to sever the world's underwater communication lifelines?
When does marine science become a prelude to underwater warfare?
Mapping the Depths: China's 1-Kilometer Resolution "Transparent Ocean" Network and the New Undersea Arms Race
Overview
Indonesia’s discovery of a suspected Chinese unmanned underwater vehicle in the Lombok Strait in April 2026 highlights growing concerns over China’s expanding undersea surveillance network. This incident is part of a broader, decade-long Chinese effort to map and monitor the Pacific, Indian, and Arctic oceans using dozens of research vessels and hundreds of sensors. The use of unmanned systems for covert seabed mapping and intelligence gathering signals intensifying maritime competition in the region. Naval experts warn that China’s detailed knowledge of marine conditions could be crucial for future submarine warfare, challenging the traditional advantages held by other naval powers.