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Men on the Sea Floor (Italian:Uomini sul fondo) is a 1941 Italian drama film directed by Francesco De Robertis. De Robertis specialised in semi-documentary films, in this case portraying the crew of an Italian submarine trapped after an accident. De Robertis's technique of using non-actors in roles has been credited as an influence on the development of Italian neorealism. It was known as SOS Submarine.