History of inventions does not have a more interesting chapter than that of submarines. Sailing under ocean’s waves was an allure for all the heroes that led to making of this masterpiece. In 1830s and 40s, various French inventors including Petit Villeroi, Payerne, DeMontgery hadprovided submersible concepts and some of them were actually built too. But only after French Navy became keen in the design offered by naval constructor Charles Brun and Captain Bourgeois, notable progress was made in these wonder machines. In 1859, Brun and Bourgeois started putting in their efforts on Le Plongeur, which was earliest submarine, independent of human power for propulsion.