[3] Almirante Barroso was the first Brazilian vessel to have radiotelegraphy, thus promoting the first experiences with this system in the country.

In 1904, it was the flagship of the Northern Naval Division, in Manaus, during a period of tension between Brazil and Peru over border issues.

In 1908, it brought back the remains of admirals Barroso and Saldanha da Gama from Uruguay.

[4] At the time of the Revolt of the Lash, in 1910, Almirante Barroso was among the vessels that faced the mutineers, but its firepower and that of the other loyalist ships was negligible compared to just one of the rebels' dreadnoughts.

[5][6] It was considered by the navy to be an outstanding ship, "for its impeccable presentation and for the rigor and discipline, order and efficiency maintained on board".