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.
USS Nero (AC-17)
"Nero" recommissioned on 10 April and sailed five days later for the Hawaiian Islands for deep sea soundings, then steamed via Guam to the Philippines arriving Cavite on 4 August. There she coaled various naval vessels until sailing on 9 September for Yokohama to continue deep sea sounding. The collier got under way for the west coast on 24 September, stopping at Guam and Honolulu and arriving Mare Island on 15 February 1900. During this voyage she took a sounding in the area of the Challenger Deep, recording a depth of 5269 fathoms (9,636 m, 31,614 ft), the greatest depth recorded at that time. She decommissioned on 20 May.