The slave ship Coumer de Saint Marc departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Haiti.

Vessel: Coumer de Saint Marc; flag: France. People recorded in connection with the voyage: Investor: Courtois; Investor: Lerai; Captain: Moncousu, Jean. The voyage began at Nantes on 6 March 1790. Principal recorded place where captives were acquired: West Central Africa and St Helena, port unspecified. Principal recorded disembarkation place: Saint-Marc. Recorded duration of the captives' Atlantic crossing: 55 days. Estimated mortality during the crossing: 3.0%. Recorded outcome: Voyage completed as intended.