Desc: Aviso aos Navegantes: Directed by Watson Macedo. With Oscarito, Grande Otelo, Eliana Macedo, Anselmo Duarte. In Buenos Aires, Frederico hides in a ship going to Rio de Janeiro to travel for free. But Azulão, the cook, finds him and blackmails him into working in the kitchen. Meanwhile, Alberto, the captain, receives a radio message saying that there was a dangerous international spy on board. Things get worse when some passports are mixed-up.