India's Grey Counter: How New Delhi Is Fighting China's Invisible War In The Indian Ocean

Data shows Chinese vessel conducting repeated survey missions between 2024 and 2025 across strategic waters near Taiwan, Guam, and, critically, through the Indian Ocean

There is a version of a contest that occurs with no shots fired, no diplomatic communiqués, and no headlines. It unfolds in the deep waters of the Ninety East Ridge, in the quiet rotations of a research vessel near Sri Lanka, in the gap between two radar pings as a ship switches off its transponder south of the Malabar coast. It is the contest that Beijing has been winning, largely undisturbed, in India’s maritime backyard. Until New Delhi, slowly but with growing urgency, began to push back.

That reckoning is now underway. India’s response to China’s grey-zone maritime strategy, in times of neither war nor peace, a deliberate campaign of intelligence-gathering, infrastructure seeding, and presence-by-stealth, is taking shape across multiple fronts. From the deployment of underwater sensor networks to the fast-tracking of the procurement of autonomous maritime systems, New Delhi is building the architecture of a maritime surveillance state. The question is not whether India is responding. It is whether it is responding fast enough and whether it will be adequate.

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The Architecture of Ambiguity

China has mastered the grammar of ambiguity at sea. The research vessel Dong Fang Hong 3, operated by the Ocean University of China, is emblematic of the same. Ship-tracking data shows the vessel conducting repeated survey missions between 2024 and 2025 across strategic waters near Taiwan, Guam, and, critically, through the Indian Ocean, including routes approaching Sri Lanka, Indonesia, and the vital Malacca Strait. Chinese authorities describe these missions as climate science and seabed analysis. Naval experts are less credulous. Deep-sea mapping yields the kind of data that allows submarines to navigate covertly, evade detection, and operate at maximum efficiency. The science is, for the most part, real, but so is its military utility, which is what China is after.

And the Dong Fang Hong 3 is not alone. China’s ocean-mapping programme has documented dozens of research vessels and hundreds of seabed sensors sweeping the Pacific, Indian, and Arctic oceans in what amounts to a sustained subsurface intelligence effort. The Ridge figures prominently in that survey record, a 5,000-kilometre........

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