Editing Challenger Deep (section)

===2018 – RV ''Shen Kuo''===
On its maiden voyage, the 2,150-ton twin-hulled scientific research vessel ''Shen Kuo'' (also ''Shengkuo'', ''Shen Ko'', or ''Shen Quo''), departed Shanghai on 25 November 2018 and returned on 8 January 2019. They operated in the Mariana Trench area, and on 13 December tested a system of underwater navigation at a depth exceeding 10,000 metres, during a field trial of the ''Tsaihungyuy'' (ultra-short baseline) system. Project leader Tsui Veichen stated that, with the Tsaihungyuy equipment at depth, it was possible to obtain a signal and determine exact [[geolocation]]s. The research team from [[Shanghai Ocean University]] and [[Westlake University]] was led by Cui Weicheng, director of Shanghai Ocean University's Hadal Science and Technology Research Center (HSRC).{{citation needed|date=December 2019}}<ref>[Shanghai newspaper article to be adding ref here]</ref>
The equipment to be tested included a piloted submersible (not full ocean depth – depth achieved not available) and two deep-sea landers, all capable of diving to depths of 10,000 meters, as well as an ROV that can go to 4,500 meters. They took photographs and obtained samples from the trench, including water, sediment, macro-organisms and micro-organisms. Cui says, "If we can take photos of fish more than 8,145 meters under water, ... we will break the current world record. We will test our new equipment including the landing devices. They are second generation. The first generation could only take samples in one spot per dive, but this new second generation can take samples at different depths in one dive. We also tested the ultra short baseline acoustic positioning system on the manned submersible, the future of underwater navigation."{{citation needed|date=December 2019}}