The slave ship NS da Boa Viagem Abismo arrived with enslaved Africans in Brazil. About 305 people had been taken aboard and approximately 239 arrived.

Vessel: NS da Boa Viagem Abismo; flag: Portugal / Brazil; rig: Bergantim; estimated standardized tonnage: 122. People recorded in connection with the voyage: Captain: Brito, Antônio Luís Ribeiro de; Investor: Brito, Antônio Luís Ribeiro de; Captain: Brito, Joaquim Ribeiro de; Investor: Brito, Joaquim Ribeiro de; Captain: Rocha, Joaquim Jose da. The voyage began at Pernambuco, place unspecified on 25 August 1821. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 41 days. Estimated mortality during the crossing: 22.0%. Recorded outcome: Voyage completed as intended.