Chinese industrial advances fuel Jiaolong’s deep-sea upgrades

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For the pilots and researchers aboard Deep Sea No. 1, a busy stretch at sea can mean sending Jiaolong on dives lasting around 10 hours, day after day. Keeping the Chinese manned submersible working at that pace has become easier as new batteries last longer, domestic thrusters run more quietly and equipment needs less maintenance.

China's manned submersible Jiaolong is recovered aboard its mother ship, Deep Sea No. 1, after completing its 476th dive on November 3, 2026. Photo: Feng Fan/Global Times

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