China’s first deep manned submersible, JIAOLONG

SummaryJIAOLONG’s function and capability were fully tested during its 37 dives. The longest underwater time was 543 minutes, and the deepest dive of 3759 m was made on its 37th dive. The Chinese national flags and memorial “Dragon Palaces” were placed on the seafloor. 525 mL of pressure-sustained seawater and two sea cucumbers were sampled. Test results have indicated that all the functions and capabilities were in good agreement with the design data.