The deepest known point on Earth was reached by Jacques Piccard on 23 January 1960, when he and Lieutenant Don Walsh piloted the bathyscaphe Trieste to the floor of the Mariana Trench. This descent into the western North Pacific Ocean pushed human exploration to 10,916 meters, demonstrating the potential for submersible vessels to operate at extreme underwater pressures.
Early Development and Bathyscaphe Engineering
Born in 1922 in the Brussels metropolitan area, Piccard began his professional life as an economics teacher at the University of Geneva. He held a diploma from the Graduate Institute of International Studies in Geneva. His focus shifted to oceanography through collaboration with his father, Auguste Piccard. Together, they refined the bathyscaphe, a submersible based on balloon buoyancy principles. Between 1948 and 1955, they constructed three such vessels, achieving successful test depths of 4,600 and 10,000 feet.
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Seeking to prove the feasibility of deep-sea navigation, Piccard secured support from the U.S. Navy. The Navy purchased the Trieste and appointed Piccard as a consultant for deep-depth testing. During the 1960 descent, the vessel reached the seafloor in four hours. Despite a loud structural noise at 30,000 feet and minor window damage, the crew documented sightings of marine life before returning to the surface after a 20-minute stay.
The Ben Franklin Mesoscaphe Expedition
In 1969, Piccard led a six-man international crew on a four-week drift mission within the Gulf Stream. The 50-foot vessel, named the Ben Franklin, traveled 1,444 miles from Florida to Maine at depths of 1,000 feet. The mission included representatives from the U.S. Navy, the Royal Navy, and NASA, serving as an analogue for long-duration space flight by studying the psychological and physiological effects of prolonged isolation on the crew.
Legacy and Research Contributions
Piccard founded the Foundation for the Study and Protection of Seas and Lakes in Cully, Switzerland. Throughout his career, he authored accounts of his missions, including Seven Miles Down, and secured patents such as US Patent D200,506 for a submarine. His contributions to marine engineering and exploration were recognized through the Howard N. Potts Medal in 1972 and the Hubbard Medal in 2012. He passed away in 2008 in La Tour-de-Peilz.
Fast facts
- Born: 1922, Brussels metropolitan area
- Died: 2008, La Tour-de-Peilz
- Citizenship: Switzerland
- Occupations: Engineer, inventor, oceanographer, explorer
- Notable vessel: Bathyscaphe Trieste
- Education: Graduate Institute of International Studies, University of Basel
- Awards: Howard N. Potts Medal (1972), Hubbard Medal (2012)
Questions readers ask
Did the Trieste conduct scientific experiments in the Mariana Trench?
No. The mission was strictly intended to demonstrate that the seafloor depth could be reached and survived.
Why was the Ben Franklin mission significant to NASA?
NASA used the mission to study the effects of prolonged human isolation, viewing it as an analogue for long-duration space flight.
Achievements
- Howard N. Potts Medal
- Hubbard Medal
- Recorded as inventor, engineer and explorer
