page_title: Brazilian Navy
section_title: ARA San Juan (2017)
hierarchical_section_title: Brazilian Navy / History / Notable search and rescue missions / ARA San Juan (2017)
caption_attribution_description: Arquivo liberado pela Marinha do Brasil através de projeto GLAM com Wiki Educação Brasil
context_page_description: The Brazilian Navy is the naval service branch of the Brazilian Armed Forces, responsible for conducting naval operations. The Brazilian Navy is the largest navy in South America and in Latin America, and the second largest navy in the Americas, after the United States Navy.
  The navy was involved in Brazil's war of independence from Portugal. Most of Portugal's naval forces and bases in South America were transferred to the newly independent country. In the initial decades following independence, the country maintained a large naval force and the navy was later involved in the Cisplatine War, the River Plate conflicts, the Paraguayan War as well as other sporadic rebellions that marked Brazilian history.
  By the 1880s the Brazilian Imperial Navy was the most powerful in South America. After the 1893 naval rebellion, there was a hiatus in the development of the navy until 1905, when Brazil acquired two of the most powerful and advanced dreadnoughts of the day which sparked a dreadnought race with Brazil's South American neighbours. The Brazilian Navy participated in both World War I and World War II, engaging in anti-submarine patrols in the Atlantic.
context_section_description: On 15 November 2017, the submarine San Juan in service with the Argentine Navy, stopped communicating during a routine patrol in the South Atlantic off the coast of Argentina. A multi-nation search operation was mounted to try to locate the submarine, which was believed to have suffered an electrical malfunction. Within hours of San Juan's last transmission, reports describe an explosive noise, detected in the vicinity of the vessel's last known location.
  The frigate Rademaker, the submarine relief ship NSS Felinto Perry and the polar ship NPo Almirante Maximiano of the Brazilian Navy participated in the multinational search for the lost submarine.
caption: The submarine relief ship Felinto Perry.
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