Jacques Cousteau: the pioneer of scuba diving
How a French naval officer with a passion for the ocean helped invent the Aqua-Lung and forever changed the way the world dives and sees the seas.
Few names are as tied to the history of diving as Jacques-Yves Cousteau. A French naval officer, explorer, filmmaker, and above all an ocean enthusiast, Cousteau was one of the people most responsible for turning scuba diving from a technical curiosity into an activity practiced by millions of people around the world.
Born in France in 1910, Cousteau joined the navy at a young age, and it was there that he first tried diving, using the heavy diving suits available at the time. Frustrated by the lack of freedom of movement those rigs offered — sealed helmets and hoses tethered to the surface — he began searching for an alternative that would let him swim freely underwater.
That search led to 1943, in the middle of World War II, when Cousteau teamed up with engineer Émile Gagnan to develop the Aqua-Lung, a demand regulator that released compressed air only when the diver inhaled. The invention became the first truly practical and safe self-contained diving system, giving rise to what we now call scuba.
After the war, Cousteau spent much of his life documenting and popularizing marine life. Aboard his ship Calypso, he led expeditions around the world, and his book and film 'The Silent World,' released in 1956, won both the Palme d'Or at Cannes and an Academy Award for Best Documentary Feature — a rare feat for an ocean film at the time.
Cousteau also starred in the award-winning TV series 'The Undersea World of Jacques Cousteau,' which for decades introduced the oceans to audiences who would never get the chance to dive themselves. He also served as the first president of CMAS (Confédération Mondiale des Activités Subaquatiques), one of the oldest international diving federations, and was among the first public voices to warn about pollution, overfishing, and reef destruction.
Cousteau's legacy goes far beyond the equipment he helped invent. He changed how the public sees the ocean, bringing science, adventure, and conservation together in a way no explorer had before — and inspired entire generations of divers, marine biologists, and filmmakers.
Today, whenever someone straps on a tank and regulator to descend into the waters off Búzios, they're following, even without realizing it, the path Cousteau opened more than eighty years ago: the idea that the ocean should be within reach of anyone willing to explore it with respect.
You might also like
Émile Gagnan: the genius behind the dive regulator
The French engineer behind the demand valve that made the Aqua-Lung possible — an invention still at the heart of every dive regulator used today.
What was the Aqua-Lung, and how it changed diving
The first practical self-contained diving system in history, created in 1943 by Cousteau and Gagnan — and how it gave rise to modern recreational diving.
The history of scuba diving
From the earliest freedivers to diving bells, helmet suits, and the 1943 Aqua-Lung — the centuries-long journey that gave rise to modern scuba diving.