Editing Challenger Deep (section)

===2016 – RV ''Tansuo 01''===
From 22 June to 12 August 2016 (cruises 2016S1 and 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'' dived to a depth of {{convert|10767|m|ft|0}} in the Challenger Deep area. They also cast a free-drop lander, {{convert|9000|m|ft|0}} rated free-drop ocean-floor seismic instruments (deployed to {{convert|7731|m|ft|0}}), obtained sediment core samples, and collected over 2000 biological samples from depths ranging from {{convert|5000|to(-)|10000|m|ft|0}}.<ref>Wen-Li Li, et al., "Periodic and Spatial Spreading of Alkanes and Alcanivorax Bacteria in Deep Waters of the Mariana Trench", ''Applied and Environmental Microbiology'', January 2019, 85 (3)</ref> 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).<ref>{{cite AV media| url = https://www.youtube.com/watch?v=yqIkbDK4VQY| title = What China's submersible mother ship takes back from Mariana Trench| people = New China TV| date = 26 August 2016| via = [[YouTube]]| access-date = 1 December 2019| archive-date = 26 April 2020| archive-url = https://web.archive.org/web/20200426115557/https://www.youtube.com/watch?v=yqIkbDK4VQY&gl=US&hl=en| url-status = live}}</ref>