The slave ship Firmeza arrived with enslaved Africans in Brazil. About 490 people had been taken aboard and approximately 444 arrived.

Vessel: Firmeza; flag: Portugal / Brazil; rig: Brig; estimated standardized tonnage: 120. People recorded in connection with the voyage: Captain: Vasconcelos, Agostinho Fernando Coutinho. The voyage began at Southeast Brazil, port unspecified. Principal recorded place where captives were acquired: Ambriz (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 39 days. Recorded outcome: Voyage completed as intended.