Jiaolong (simplified Chinese: 蛟龙号; traditional Chinese: 蛟龍號; pinyin: jiāolóng hào flood dragon) is a Chinese crewed deep-sea research submersible that can dive to a depth of over 7,000 metres (23,000 ft), developed from the Sea Pole-class bathyscaphe. It has the second-greatest depth range of any crewed research vehicle of the Chinese Navy; the only crewed expeditions to have gone deeper were the dives of the Trieste bathyscaphe (10,916 metres (35,814 ft)) in 1960, Archimède (9,560 metres (31,360 ft)) in 1962, Deepsea Challenger (10,898 metres (35,755 ft)) in 2012, and DSV Limiting Factor (10,925 metres (35,843 ft)) in 2019 (with three diving to Challenger Deep).