The slave ship Mary Ann left the African coast carrying enslaved Africans toward Trinidad and Tobago. About 330 people had been taken aboard.

Vessel: Mary Ann; flag: Great Britain; rig: Ship; estimated standardized tonnage: 197. People recorded in connection with the voyage: Investor: Neilson, William; Investor: Heathcoat, William; Captain: Dodson, George. The voyage began at Liverpool on 20 October 1797. Principal recorded place where captives were acquired: Bight of Biafra and Gulf of Guinea Islands, port unspecified. Principal recorded disembarkation place: Trinidad, port unspecified. Estimated mortality during the crossing: 11.0%. Recorded outcome: Voyage completed as intended.