Riachuelo

The Riachuelo S-22 is a modern attack submarine of the Riachuelo-class vessel, stationed at a river port in Itaguaí. This boat measures about 72 meters long, weighs around 1,870 tons, and carries a crew of approximately 35 naval personnel.

The vessel was launched in December 2018 as the first of its class, developed through a technology transfer program between Brazil and France. This partnership marked a major step in Brazil's military capability and technological advancement.

The submarine is named after the Battle of Riachuelo, a key naval conflict during the Paraguayan War that demonstrated Brazil's maritime power. This name links modern defense technology to an important moment in Brazilian naval history.

You can view the submarine from outside or join a guided tour to learn more about its design and operations. It is best to check in advance about visiting possibilities, as access may be limited due to military security protocols.

The boat can remain submerged for up to 70 days and dive to depths of around 300 meters, making it one of the most advanced platforms of its size. These capabilities allow the vessel to conduct extended patrols without needing to surface.

GPS coordinates: -22.90042,-43.17458

Latest update: December 9, 2025 13:10