Jacques Piccard

Jacques Ernest-Jean Piccard was born on July 28, 1922, in the Brussels metropolitan area, where his Swiss father held a university post ^[1]. That father was Auguste Piccard, the physicist who in 1931 and 1932 flew a pressurised balloon gondola of his own design into the stratosphere, reaching altitudes above 15,000 metres and becoming one of the most famous scientists in Europe ^[2]. Jacques grew up surrounded by instruments, engineering sketches, and public attention. His twin uncle Jean-Felix Piccard also flew stratospheric balloons in the United States, so record-setting exploration was less a dream in the household than a family trade.

The family's Swiss citizenship shaped his education. Jacques studied at the École Nouvelle de Suisse Romande near Lausanne and later attended the University of Geneva, where he read economics and prepared for what looked like a conventional academic career ^[1]. The Second World War interrupted that path. He served with the French First Army toward the end of the conflict before returning to Geneva to complete his studies and begin teaching ^[3].

Economics did not hold him for long. In the late 1940s his father turned the pressure-cabin logic of the stratospheric balloon upside down, designing a vessel that would sink rather than rise: a float filled with lighter-than-water gasoline supporting a heavy steel crew sphere. Auguste called it a bathyscaphe, a deep boat. Jacques left the lecture hall to help build it, and the collaboration between father and son defined the rest of his life ^[2].

The first Piccard bathyscaphe, FNRS-2, was funded by the Belgian national research fund and tested off West Africa in 1948. It proved the concept but was battered by surface waves, and the project passed to the French Navy ^[2]. Father and son started again on their own terms. With backing from the city of Trieste and Swiss and Italian supporters, they constructed a sturdier craft, launched in August 1953 and named Trieste after the port that had championed it ^[3].

The design answered a brutal problem: at great depth, water presses on a hull with more than a tonne of force per square centimetre. The Trieste carried its two-person crew inside a forged steel sphere with walls several centimetres thick, slung beneath a long float holding tens of thousands of litres of gasoline for buoyancy. Iron shot held in hoppers by electromagnets served as ballast; releasing it, or simply cutting power, sent the craft back toward the surface, a fail-safe that required no machinery to work ^[4].

Through the mid-1950s the Piccards made progressively deeper dives in the Mediterranean, at one point exceeding 3,000 metres off the Italian coast ^[3]. Money remained scarce until the United States Office of Naval Research, interested in the military and scientific value of the deep ocean, purchased the Trieste in 1958. Jacques went with it to San Diego as a consultant, training American crews and overseeing the boat's refit with a new, stronger sphere forged by Krupp in Germany ^[4].

The US Navy's Project Nekton aimed at the deepest place on Earth: the Challenger Deep, a slot in the Mariana Trench southwest of Guam. On the morning of January 23, 1960, Jacques Piccard and Navy lieutenant Don Walsh sealed themselves into the Trieste's sphere and began to sink through water that grew dark within minutes ^[4]. The descent took nearly five hours. At around 9,000 metres a loud crack startled the crew; an outer plexiglass window in the entrance tube had fractured under pressure, though the crew sphere itself held ^[5].

They touched down on a bottom of pale ooze at a depth the onboard gauge read as more than 11,000 metres, later corrected to roughly 10,900 metres ^[4]. Piccard reported seeing a flatfish-like creature swim away from the landing site, an observation biologists have debated ever since, since it suggested that vertebrate life could survive at full ocean depth ^[5]. Whatever the animal was, the dive settled a practical argument: even the deepest trench was not a lifeless void, and Piccard later argued that this alone should rule out using trenches as dumping grounds for radioactive waste ^[6].

After about twenty minutes on the bottom, the two men released ballast and rose back to the surface in a little over three hours, emerging to worldwide headlines ^[4]. No human returned to the Challenger Deep until the film director James Cameron made a solo dive in 2012, more than fifty-two years later ^[7]. Piccard and Walsh received honours from President Dwight Eisenhower, and the dive remains the achievement most people mean when they ask who was Jacques Piccard.

Piccard did not treat the 1960 dive as a finish line. He believed the middle depths of the ocean mattered as much as its extremes, and he coined the term mesoscaphe for a new class of vehicle designed to cruise there rather than plunge straight down ^[3]. His first, the Auguste Piccard, was built for the Swiss National Exhibition of 1964 in Lausanne. It carried around forty passengers at a time into Lake Geneva and took tens of thousands of visitors underwater during the exhibition, an early demonstration that submersibles could serve the public, not only navies and laboratories ^[1].

His second mesoscaphe had a scientific mission. The Ben Franklin (PX-15), built in Switzerland and operated with support from Grumman and American agencies, was designed to drift silently inside the Gulf Stream. In the summer of 1969, while public attention was fixed on the Apollo 11 Moon landing, Piccard and a five-man crew sealed themselves in off Palm Beach, Florida, and drifted submerged for about four weeks, covering roughly 2,400 kilometres northward to a point off Nova Scotia ^[6].

The drift produced data on the current's structure and on the scattered life of mid-water depths. NASA placed an observer aboard to study how a small crew behaved in a sealed vehicle over many weeks, treating the mission as an analogue for long spaceflights ^[6]. The Ben Franklin was later preserved and is displayed at the Vancouver Maritime Museum in Canada ^[8].

Piccard married Marie-Claude Maillard in 1953, and the couple settled on the Swiss shore of Lake Geneva, raising their children in Lausanne and later at Cully ^[1]. He kept Swiss nationality throughout his life despite his Belgian birthplace and his years of work in Italy and the United States. Friends and interviewers described a courteous, precise man who preferred engineering detail to self-promotion, though he spoke readily about the ocean and its future ^[5].

The family's exploring streak continued into a third generation. His son Bertrand Piccard, a psychiatrist and aeronaut, co-piloted the first balloon to fly non-stop around the world in 1999 and later led the Solar Impulse solar aircraft project ^[7]. Jacques lived to see the balloon flight, which made the Piccards the only family with members who had reached both the stratosphere and the deepest seafloor. He often noted the symmetry between his father's ascents and his own descents, two applications of the same buoyancy principle.

From the 1970s onward Piccard concentrated on the lake at his doorstep and on environmental advocacy. He founded the Foundation for the Study and Protection of Seas and Lakes, based at Cully on Lake Geneva, and used it to press for controls on pollution in Swiss lakes and the world ocean ^[1]. He also built a small submersible, the F.-A. Forel, named for the pioneering Swiss limnologist, and piloted it on hundreds of scientific and inspection dives in Lake Geneva and elsewhere through the 1980s and 1990s ^[3].

He advised governments and international bodies on marine matters and returned often, in lectures and interviews, to the argument he had drawn from the Challenger Deep: that finding life at the extreme bottom obliged humanity to treat the deep sea as a living system rather than a dump ^[6]. Age slowed him but never fully retired him; he continued working with his foundation into his eighties.

Jacques Piccard died on November 1, 2008, at his home in La Tour-de-Peilz on Lake Geneva, aged 86 ^[5]. Obituaries in the international press ranked the 1960 dive alongside the first ascent of Everest and the early spaceflights among the century's landmark journeys ^[7].

Any account of Jacques Piccard achievements starts with a record that stood for decades: he and Don Walsh remain the first, and for fifty-two years were the only, people to reach the ocean's deepest point ^[4]. When later expeditions returned, including Cameron's 2012 solo descent and Victor Vescovo's repeated dives from 2019, their crews consistently credited the Trieste dive as the founding act of hadal exploration ^[7]. The basic safety logic of the bathyscaphe, ballast that drops away when power fails, influenced submersible design long after gasoline floats gave way to syntactic foam.

His quieter legacies may matter as much. The tourist submarine industry traces a line back to the mesoscaphe that carried exhibition visitors into Lake Geneva in 1964, and the Ben Franklin drift is still cited in studies of both the Gulf Stream and crew confinement ^[6]. Among Jacques Piccard facts that biographers highlight, one has entered scientific folklore: his report of a living fish at nearly 11,000 metres pushed marine biologists to take the hadal zone seriously as a habitat, even as they questioned the identification ^[5].

For readers of any Jacques Piccard biography, the through-line is a family idea carried across three generations: that a well-built pressure vessel and a sound understanding of buoyancy can take people anywhere from the stratosphere to the trench floor, and that going there creates a duty to protect what is found. Museums in Switzerland, the United States, and Canada preserve his vehicles, and the Trieste itself is displayed at the US Navy museum in Washington, DC ^[8].