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Brazilian Navy commissions Riachuelo class submarine Humaita.


| Naval News Navy 2024

According to information published by the Brazilian MoD on January 12, 2024, the Scorpene class submarine Humaitá (S41) submarine was officially transferred to the Brazilian Navy's Naval Force's Operational Sector.
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Russian Vyborg Shipyard laid the Purga ice class coastguard ship of project 23550 925 001 Brazilian Riachuelo class submarine Humaita. (Picture source: Brazilian MoD)


This event took place during the traditional Armament Display Ceremony at the Itaguaí Naval Complex in Rio de Janeiro. The second of four Riachuelo class diesel-electric submarines Humaitá," has successfully completed its schedule of Acceptance Tests both at the port and at sea.

Now fully operational, Humaitá is set to embark on its missions, including the crucial task of patrolling the "Blue Amazon" and other areas of strategic importance to Brazil in the South Atlantic.

The ongoing activities related to the S-BR "Tonelero" (S42), "Angostura" (S43), and the Conventionally Armed Submarine with Nuclear Propulsion (SCPN) "Álvaro Alberto" are progressing as planned, each at different stages of readiness.

About the submarine Humaitá

With a length of approximately 70 meters, a beam of around 6.2 meters, and a draught of 5.5 meters, the Humaitá has a surfaced displacement of about 1,870 tons and 2,200 tons when submerged.

The Humaitá is well-armed, equipped with heavyweight torpedoes and has the potential for integration with anti-ship and land-attack missiles. Its advanced electronic warfare and countermeasure systems enhance its defensive capabilities.

State-of-the-art sonar and acoustic systems provide superior detection capabilities, and the integrated combat management system ensures coordinated mission planning and execution. The submarine's design also emphasizes a low acoustic signature for stealth operations.

Strategically, Humaitá enhances Brazil's naval power in South America and underscores its growing expertise in military technology. The construction of the Riachuelo class submarines, including the "Humaitá," involves substantial technology transfer and has fostered the development of Brazil's domestic defense industry.


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