The slave ship Mersey left the African coast carrying enslaved Africans toward Martinique. About 346 people had been taken aboard.

Vessel: Mersey; flag: Great Britain; rig: Ship; estimated standardized tonnage: 212. People recorded in connection with the voyage: Captain: Johnson, Robert; Investor: Johnson, Robert; Captain: Molyneux, Thomas; Investor: Molyneux, Thomas. The voyage began at Liverpool on 23 May 1797. Principal recorded place where captives were acquired: Malembo (West Central Africa and St Helena). Principal recorded disembarkation place: Martinique, place unspecified. Recorded outcome: Voyage completed as intended.