The slave ship NS das Brotas e S João Nepomuceno left the African coast carrying enslaved Africans toward Brazil. About 582 people had been taken aboard.

Vessel: NS das Brotas e S João Nepomuceno; flag: Portugal / Brazil; rig: Curveta. People recorded in connection with the voyage: Captain: Rosario, Inácio Antunes do; Captain: Garcia, Antônio Correa. The voyage began at Rio de Janeiro on 15 December 1797. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Estimated mortality during the crossing: 13.0%. Recorded outcome: Voyage completed as intended.