The slave ship S João Batista Alerta completed the voyage after transporting enslaved Africans to Brazil.

Vessel: S João Batista Alerta; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Captain: Pereira, José Antônio; Investor: Pereira, José Antônio; Captain: Camacho, Manoel Marques. The voyage began at Lisbon on 14 November 1804. Principal recorded place where captives were acquired: Gabon (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Maranhão. Recorded outcome: Voyage completed as intended.