download the appSign up to get the inside scoop on today’s biggest stories in markets, tech, and business — delivered daily. Read previewChina is mapping vast areas of the Indian Ocean under the guise of civilian research — and it could be to plan submarine warfare, a think tank said. The CSIS said that while much of the research was in the western Pacific and South China Sea, Chinese research vessels increasingly focused on the Indian Ocean. AdvertisementUsing data from Windward, a maritime AI-data company, the think tank said it found Chinese research boats had conducted "hundreds of thousands of hours of operations globally over the past four years." AdvertisementThe Indian Ocean is a vital area for China's "strategic and economic interests," Matthew Funaiole, a senior fellow at CSIS who worked on the report, told The Washington Post.

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Persons: —, Matthew Funaiole, Andrew Scobell Organizations: Service, Business, Center for Strategic, International Studies, China's People's Liberation Army, CSIS, Washington Post, United States Institute of Peace, Associated Press Locations: China, Pacific, South China, Windward, Beijing, India, New Delhi, Sri Lanka