2016 – RV "Tansuo 01" –– From 22 June -12 August 2016 (cruises 2016S1 & 2016S2), the Chinese Academy of Sciences' 6,250-ton submersible support ship "Tansuo 1" (meaning: to explore) on her maiden voyage deployed to the Challenger Deep from her home port of Sanya, Hainan Island. On 12 July 2016, the ROV "Haidou-1" dove to a depth of in the Challenger Deep area. They also cast a free-drop lander, rated free-drop ocean-floor seismic instruments (deployed to ), obtained sediment core samples, and collected over 2000 biological samples from depth ranging from . The "Tansuo 01" operated along the 142°30.00' longitude line, about 30 nmi east of the earlier DY37II cruise survey (see "Xiangyanghong 09" above).