On May 27, French naval shipbuilder DCNS has started the construction of the first of four S-BR (Submarino BRasileiro) diesel-powered submarines ordered by the Brazilian Navy. The fleet is scheduled to be delivered between 2017 and 2021.

The front of the hull will be built at DCNS facilities in Cherbourg and transferred to Brazil at the end of 2013 or at the start of 2014 where the fleet will be built by Itaguaí Construções Navais SA, a Brazilian shipbuilder jointly owned by DCNS and Construtora Norberto Odebrecht SA.

The EUR6.7 billion contract firmed in September 2009 and being managed by the PROSUB (PROgrama de Desenvolvimento de SUBmarinos) team cover the construction of a modern naval base, a shipyard, training of Brazilian engineers, transfer of technology, armaments and spare parts supply.

DCNS will provide technical expertise to develop and build the hull of the SN-BR (Submarino Nuclear BRasileiro) nuclear powered submarine to be delivered in 2025. S-BR will be manned by a crew of between 30 to 45 submariners. For a length overall of 75 meters the design offers a surface displacement of less than 2000 tons and a top speed of 20 knots when submerged. The vessel is able to submerge to up to 350 meters.

The 80 HLES steel for the submarines is being provided by Industeel France (a subsidiary of ArcelorMittal), attack periscope and optronic mast will come from Sagem Défense Sécurité SA, the powerplant from Jeumont Electric and Schneider Electric and the sonar from Thales Underwater Systems, The fleet will be fitted with the SUBTICS (Submarine Tactical Integrated Combat System) generation 3 combat management system. When compared with Scorpène´s procured by Chile, Malaysian and India, S-BR will be longer and with an increased autonomy of up to 70 days.

Armaments consist of 6 launching tubes for 18 heavyweight torpedoes to be developed and build under the project NEMESIS. The company confirmed the delivery of CONTRALTO-S torpedo decoy system. The fleet is also scheduled to be armed with the MBDA Exocet SM39 anti-ship missile.


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