Editing Challenger Deep (section)

===Direct measurements===
The 2010 maximal sonar mapping depths reported by Gardner et.al. in 2014 and Greenaway et al. study in 2021 have not been confirmed by direct descent (pressure gauge/manometer) measurements at full-ocean depth.<ref>{{cite web |url=http://ccom.unh.edu/sites/default/files/publications/Gardner-et-al-2014-Challenger-Deep.pdf |title=So, How Deep Is the Mariana Trench? |date=5 March 2014 |publisher=Center for Coastal & Ocean Mapping-Joint Hydrographic Center (CCOM/JHC), Chase Ocean Engineering Laboratory of the University of New Hampshire |access-date=20 May 2014 |archive-date=21 May 2014 |archive-url=https://web.archive.org/web/20140521032157/http://ccom.unh.edu/sites/default/files/publications/Gardner-et-al-2014-Challenger-Deep.pdf |url-status=live }}</ref> Expeditions have reported direct measured maximal depths in a narrow range.

*For the '''''western'' basin''' deepest depths were reported as {{convert|10913|m|ft|abbr=on}} by {{ship|Bathyscaphe|Trieste||2}} in 1960 and {{Convert|10923|m|ft|abbr=on}} ±{{Convert|4|m|ft|abbr=on}} by ''[[DSV Limiting Factor]]'' in June 2020.
*For the '''''central'' basin''' the greatest reported depth is {{Convert|10915|m|ft|abbr=on}} ±{{Convert|4|m|ft|abbr=on}} by ''DSV Limiting Factor'' in June 2020.
*For the '''''eastern'' basin''' deepest depths were reported as {{convert|10911|m|ft|abbr=on}} by [[Kaikō ROV]] in 1995, {{convert|10902|m|ft|abbr=on}} by [[Nereus (underwater vehicle)|ROV ''Nereus'']] in 2009, {{convert|10908|m|ft|abbr=on}} by {{ship||Deepsea Challenger}} in 2012, {{convert|10929|m|ft|abbr=on}} by [[benthic lander]] "Leggo" in May 2019, and {{Convert|10925|m|ft|abbr=on}} ±{{Convert|4|m|ft|abbr=on}} by ''DSV Limiting Factor'' in May 2019.