In Development by Itaguaí, a Naval Construction Company (ICN), the Ships Designed for the Navy’s Submarine Development Program (PROSUB) Are in Their Final Stages
As far as is known at present, the Navy’s Submarines (PROSUB) from the Brazilian Navy (MB) are already divided into 05 main sections, namely: S1, S2A, S2B, S3, and S. Furthermore, the special highlight of today’s information will be focused solely on sections S1 and S2A.
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Naval Construction – PROSUB Submarine Characteristics of Section S1

In summary, section S1 is located at the end of the submarine. It is precisely what will determine the direction and stabilized depth limits throughout navigation on the seabed. Undoubtedly, a modern strategy of naval construction.
Thus, an important item for the energy conversion of the PROSUB submarine has also been placed at the end of the submarine – a propeller shaft for better and quieter movement.
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Naval Construction – PROSUB Submarine Characteristics of Section S2A

In this section of the PROSUB submarine being developed by Itaguaí, the diesel compartments and another 04 engines that serve as a kind of charger for the batteries are located.
Finally, in 2019, there were also advances involving naval construction in PROSUB. With the completion of acceptance tests at the dock and the successful static submersion, which marked the beginning of at-sea acceptance tests for the “Riachuelo” Submarine. Undoubtedly, the first of the four vessels with diesel-electric propulsion planned in the aforementioned Program. The Brazilian naval construction has invested billions.
About the Navy’s Submarine Development Program (PROSUB)

In summary, the Submarine Development Program (PROSUB) of the Brazilian Navy is the result of a technology transfer agreement with the French company Naval Group (formerly DCNS). Signed in 2008 by Brazil and France, it will enable the production of four Scorpène-class conventional submarines. It will also assist in the manufacturing of the first Brazilian nuclear-powered submarine (SN-BR).

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