Bathyscaphe Trieste
Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe, which with its crew of two reached a record maximum depth of about , in the deepest known part of the Earth's oceans, the Challenger Deep, in the Mariana Trench near Guam in the Pacific. On 23 January 1960, Jacques Piccard (son of the boat's designer Auguste Piccard) and US Navy Lieutenant Don Walsh achieved the goal of Project Nekton.
Hadal zone
James Cameron also reached the bottom of Mariana Trench in March 2012 using the "Deepsea Challenger". The descent of the "Deepsea Challenger" was unable to break the deepest dive record set by Piccard and Walsh by about 100 meters, however Cameron holds the record for the deepest solo dive.