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

Vessel: Diligente; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Investor: Loureiro, Domingos Gomes Duarte; Captain: Ferreira, Antônio José. The voyage began at Rio de Janeiro on 31 October 1817. Principal recorded place where captives were acquired: Cabinda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 33 days. Estimated mortality during the crossing: 15.0%. Recorded outcome: Voyage completed as intended.