Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe, which with her 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 achieving the goal of Project Nekton. Trieste was the first manned vessel to have reached the bottom of the Challenger Deep.