The slave ship Boa União arrived with enslaved Africans in Brazil. About 430 people had been taken aboard and approximately 394 arrived.

Vessel: Boa União; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Investor: Gomes, Miguel Ferreira; Captain: Franco, Joaquim Antônio. The voyage began at Rio de Janeiro on 14 September 1824. 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: 44 days. Estimated mortality during the crossing: 8.0%. Recorded outcome: Voyage completed as intended.