The slave ship S Antônio Milagroso departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: S Antônio Milagroso; flag: Portugal / Brazil; rig: Bergantim; estimated standardized tonnage: 110. People recorded in connection with the voyage: Investor: Machado, Manoel José e Costa; Captain: Paranhos, José Joaquim da Silva. The voyage began at Bahia, place unspecified on 6 October 1811. Principal recorded place where captives were acquired: Calabar (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Bahia, place unspecified. Recorded duration of the captives' Atlantic crossing: 47 days. Estimated mortality during the crossing: 26.0%. Recorded outcome: Voyage completed as intended.