The slave ship Roy de Louangue left the African coast carrying enslaved Africans toward French Guiana. About 401 people had been taken aboard.

Vessel: Roy de Louangue; flag: France; estimated standardized tonnage: 272.3. People recorded in connection with the voyage: Investor: La Clauserie, René-Bertrand de; Captain: Thomas, Fr. The voyage began at Nantes on 1 June 1765. Principal recorded place where captives were acquired: West Central Africa and St Helena, port unspecified. Principal recorded disembarkation place: Cayenne. Recorded duration of the captives' Atlantic crossing: 49 days. Estimated mortality during the crossing: 48.0%. Recorded outcome: Voyage completed as intended.