Research Vessels: Submersibles - Trieste
The Trieste at sea. (Office of Naval Research photo)
Almost forty years ago, the Trieste and its two occupants, (then)
U.S. Navy Lieutenant Don Walsh and Swiss scientist Jacques Piccard,
journeyed to the bottom of Challenger Deep in the Marianas Trench,
the deepest point known in the ocean. No one has been back since.
Read Department of Defense and Department of the Navy press releases
as Trieste continued to set and break its own records for deep-sea
dives in the late 1950s and early 1960s.
- January 8, 1958
- During a series of dives off the coast of Naples, the Trieste,
engaged in an ONR research program, makes some puzzling discoveries
about sound properties and ocean life near the floor of the Mediterranean
- August 23, 1958
- The Trieste arrives in San Diego, California, after being purchased
by ONR. Under a joint program by ONR and the Navy Electronics
Laboratory, the Trieste will explore the ocean depths and be evaluated
for its potential as a research tool and as a submarine rescue
- October 5, 1959
- The Trieste prepares to begin a three-month series of dives
off the Marianas Islands in the Pacific Ocean.
- November 16, 1959
- The Trieste sets a world record by diving 18,600 feet in the
- January 8, 1960
- The Trieste breaks its own record by diving 24,000 feet into
the Marianas Trench in the Pacific Ocean.
- January 23, 1960
- The Trieste breaks its own record again and sets an all-time
depth record by diving to the bottom of the Challenger Deep in
the Marianas Trench in the Pacific Ocean. At 37,800 feet, the
Challenger Deep is the deepest spot known in all the oceans.
- February 1, 1960
- The Navy celebrates the Trieste's all-time record-breaking dive.