French explorer and oceanographer Jacques-Yves Cousteau near his "diving saucer" during an undersea exploration in the Red Sea, in June of 1963. Together with Jean Mollard, he created the SP-350, a two-man submarine that could reach a depth of 350 m below the ocean's surface. (OFF/AFP/Getty Images)
This may not be the first scuba suit. But, it is the first one that was actually useful in any way whatsoever this suit was made some german company named Messr S. and could go down to at least 200ft under water (since that’s how long the line was.) By the way, as a bonus it also only killed a quarter of the people who used it.