The slave ship Atalante left the African coast carrying enslaved Africans toward Brazil. About 155 people had been taken aboard.

Vessel: Atalante; flag: Portugal / Brazil; rig: Sumaca. People recorded in connection with the voyage: Investor: Guimarães, Antônio Pedro da Silva; Captain: Ferreira, João Batista. The voyage began at Bahia, place unspecified on 12 June 1804. 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: 33 days. Estimated mortality during the crossing: 6.0%. Recorded outcome: Voyage completed as intended.