Madeira Island Submarine Base, commonly shortened BSIM is a submarine base of the Brazilian Navy, located in ItaguaÃÂ, Brazil.
The BSIM was conceived in order to receive the construction of the new submarines of the Navy and to serve as the headquarters of the company ItaguaàConstruções Navais.
The first Brazilian Scorpène class submarine (S40), was launched on 14 December 2018, with the (S41) on 11 December 2020. The construction of the submarines Tonelero (S42) and Almirante Karam (S43) started in 2017 and 2018 respectively. Since 2018, the base is home of the construction of the Brazilian nuclear submarine ÃÂlvaro Alberto. On 12 July 2021, the Navy transferred the Brazilian Submarine Force Command (ComForS) to the site.