Cousteau and Gagnan:

lived in Sealab II
developed "significant wave" theory
created a self-contained diving vessel called Trieste
invented SCUBA

equipment

Jacques Cousteau and Emile Gagnan were French naval engineers who worked together to develop a self-contained underwater breathing apparatus (SCUBA) in 1943. Prior to their invention, divers relied on air supplied from the surface, limiting their ability to explore the depths of the ocean. Their invention consisted of a demand valve that would deliver air to the diver only when they breathed in, along with a compressed air tank that would supply the air. This allowed the diver greater freedom of movement and exploration.

Cousteau and Gagnan's invention was crucial for marine research and led to the development of underwater photography and cinematography, making it possible for people to see the wonders of the ocean from a new perspective. In addition to their work on SCUBA technology, Cousteau and Gagnan also developed the "significant wave" theory, which is used to help predict ocean wave patterns. They also designed and built the deep-sea diving vessel, Trieste, which was used to explore the deepest part of the ocean, the Mariana Trench in 1960.

Later on, Cousteau co-produced and hosted a documentary television series called "The Undersea World of Jacques Cousteau," which ran from 1968 to 1976 and introduced millions of people to the wonders of the ocean. Both Cousteau and Gagnan had a significant impact on ocean exploration and continue to inspire new generations of marine scientists and adventurers.