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

Vessel: Constante; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Captain: Ribeiro, Manoel Joaquim Álvares; Investor: Ribeiro, Manoel Joaquim Álvares; Captain: Abreu, Francisco Xavier de. The voyage began at Bahia, place unspecified on 7 March 1812. Principal recorded place where captives were acquired: Costa da Mina, place unspecified (Bight of Benin). Principal recorded disembarkation place: Bahia, place unspecified. Recorded duration of the captives' Atlantic crossing: 45 days. Estimated mortality during the crossing: 11.0%. Recorded outcome: Voyage completed as intended.