The first of the four scorpion submarines of the Prosub program was commissioned by the Brazilian Navy. The Rietzuela has been built entirely in Brazil by Ida Guai Construcos-Nivei, ICN, thanks to a transfer of technology program from Naval Group. The ceremony took place at the Ida Guai Naval Base. The scorpion is a 2000 tons conventional submarine designed by Naval Group for all types of missions, such as anti-surface warfare, anti-submarine warfare, long-range strikes, special operations or intelligence gathering. Extremely stealthy and fast, it has a level of operating automation that allows a limited number of crew, which reduces its operating costs significantly. Its combat edge is highlighted by the fact that it has six weapon launching tubes, 18 weapons, torpedoes, missiles. In 2009, Brazil purchased four enlarged scorpions for $10 billion United States with a technology transfer agreement and a second agreement to develop a French Brazilian nuclear-powered submarine. The Brazilian submarine class was given the designation Rietzuela class. The hull of the first SBR-S40 was laid down at Sherberg on 27 May 2010 and is to be jumboized at the Brazilian Navy shipyard in Sipetiba in late 2012. The latter three submarines will be built there entirely and are planned to be commissioned in 2020, 2021 and 2022. The nuclear-powered submarine Alvaro Alberto is under construction since 2018, with scheduled launch for 2027. The first submarine Rietzuela was launched on 14 December 2018 and began sea trials in September 2019. All the submarines are built by the Brazilian Defense Company Ida Guay Construcos-Nivea. With 14 submarines sold worldwide, the scorpion is a key reference of conventional attack submarines, SSK, for navies around the world. It can be easily adapted to specific requirements of customers and the continuous improvement of the scorpion ensures the seamless integration of the latest technology onboard.