Editing Challenger Deep (section)

===2010 – RV ''Yokosuka''===
JAMSTEC returned ''Yokosuka'' to the Challenger Deep with cruise YK10-16, 21–28 November 2010. The chief scientist of this joint Japanese-Danish expedition was Hiroshi Kitazato of the Institute of Biogeosciences, JAMSTEC. The cruise was titled "Biogeosciences at the Challenger Deep: relict organisms and their relations to biogeochemical cycles". The Japanese teams made five deployments of their 11,000-meter camera system (three to 6,000 meters – two into the central basin of the Challenger Deep) which returned with 15 sediment cores, video records and 140 scavenging amphipod specimens. The Danish Ultra Deep Lander System was employed by Ronnie Glud et al on four casts, two into the central basin of the Challenger Deep and two to 6,000 m some 34 nmi west of the central basin. The deepest depth recorded was on 28 November 2010 – camera cast CS5 – {{Coord|11|21.9810|N|142|25.8680|E}}}, at a corrected depth of {{convert|10889.6|m|ft|0}} (the central basin).<ref>[http://www.godac.jamstec.go.jp/darwin/cruise/yokosuka/yk10-16/e *Biogeosciences at the Challenger Deep, the deepest point of the world: relict organisms and their relations to biogeochemical cycles"] {{Webarchive|url=https://web.archive.org/web/20191205062129/http://www.godac.jamstec.go.jp/darwin/cruise/yokosuka/yk10-16/e |date=5 December 2019 }}, Preliminary Report for Yokosuka Cruise no. YK 10-16, Challenger Deep Mariana trench, Pacific Ocean, 20 November – 6 December 2010, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Cruise Report</ref>