Atlântico

During the development of the future Rio de Janeiro, Brazil was offered several dozen projects. One proposal came from Admiral de Basellar to install 240 mm secondary battery guns on the battleship, which was a bold step in terms of shipbuilding at that time. In response to this idea, Tennyson-d'Eincourt developed Project 686—a battleship with eight 405 mm guns placed in four turrets and a battleship with six 240 mm guns in three turrets. Despite support from de Basellar, the project was never implemented. Atlântico is a variant of the further development of the Brazilian battleship with more focus placed on increasing her firepower.