The slave ship Doze de Outubro left the African coast carrying enslaved Africans toward Brazil. About 290 people had been taken aboard.

Vessel: Doze de Outubro; flag: Portugal / Brazil; rig: Brig; estimated standardized tonnage: 138. People recorded in connection with the voyage: Captain: Cruz, João José. The voyage began at Rio de Janeiro on 8 May 1839. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Ilha Grande. Recorded duration of the captives' Atlantic crossing: 31 days. Recorded outcome: Voyage completed as intended.