The slave ship Roy de Louangue left the African coast carrying enslaved Africans toward Haiti. About 221 people had been taken aboard.

Vessel: Roy de Louangue; flag: France; estimated standardized tonnage: 218.3. People recorded in connection with the voyage: Investor: Wailch, Antoine; Captain: Ollier, Joseph. The voyage began at Nantes on 26 May 1749. Principal recorded place where captives were acquired: Loango (West Central Africa and St Helena). Principal recorded disembarkation place: Cayes (Les). Recorded duration of the captives' Atlantic crossing: 51 days. Estimated mortality during the crossing: 10.0%. Recorded outcome: Condemned - Americas after disembarkation.