Insignia: U.S. Navy Submersible Test Group. Bathysaph TRIESTE. Challenger deep
Insignia: U.S. Navy Submersible Test Group. Plaque of the unit that operated the BATHYSCAPH TRIESTE. This particular plaque commemorates her record dive of 37800 feet in the Challenger deep on January 23, 1960. "The Conquest of Inner Space. 37,800 Feet. Challenger Deep."
Naval History and Heritage Command