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.
Operation Wigwam
Operation Wigwam involved a single test of the Mark 90 Betty nuclear bomb. It was conducted between "Operation Teapot" and "Project 56" on May 14, 1955, about southwest of San Diego, California. 6,800 personnel aboard 30 ships were involved in "Wigwam". The purpose of "Wigwam" was to determine the vulnerability of submarines to deeply detonated nuclear weapons, and to evaluate the feasibility of using such weapons in a combat situation. The task force commander, Admiral John Sylvester, was embarked on the task force flagship . WIGWAM was the first atomic test in the deep ocean, and it remains the only test that has been conducted in water deeper than 1000 ft.
The test device was suspended to a depth of by cable attached to a barge. A tow line connected the 205 ft. (a ) and the shot barge itself. Suspended from the tow lines of other tugs were three miniature unmanned submarines named "Squaws", each packed with cameras and telemetry instruments.