I always thought of Jacques Cousteau as a film director, maybe a scientist or biologist.

Today I’ve read in wiki, that he was an academician, the co-inventor of the aqua-lung, and worked on the first waterproof film cameras.

Reasonable, but I never thought of him this way — so rare for academicians to do some ‘field work’.

Moreover, he was the man who worked on (and experimented with) ships with sails working on the Magnus effect. The turbosail technology was co-invented by him, but there is only one ship using it — the Alcyone, which Cousteau was engineering with his team.