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.
Kaikō ROV
In March 1995, "Kaikō" became the second vessel ever to reach the bottom of the Challenger Deep, and the first craft to visit this location since the "Trieste" mission. The maximum depth measured on that dive was 10,911.4 meters, marking the deepest dive for an unmanned submersible to date. On 31 May 2009, "Nereus" became the third vessel to visit the bottom of the Challenger Deep, reaching a maximum recorded depth of 10,902 meters.