The slave ship Protetor departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: Protetor; flag: Portugal / Brazil; rig: Bergantim. People recorded in connection with the voyage: Captain: Freitas, Gregório José Ribeiro de. The voyage began at Bahia, place unspecified on 25 July 1811. 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: 56 days. Estimated mortality during the crossing: 38.0%. Recorded outcome: Voyage completed as intended.