The slave ship Haast U Langzaam left the African coast carrying enslaved Africans toward Sint Eustatius. About 255 people had been taken aboard.

Vessel: Haast U Langzaam; flag: Netherlands; rig: Fregat; estimated standardized tonnage: 448.7. People recorded in connection with the voyage: Investor: Middelburgsche Commercie Compagnie; Captain: Kakom, Cornelis van. The voyage began at Zeeland on 6 April 1775. Principal recorded place where captives were acquired: Cape Lahou (Windward Coast). Principal recorded disembarkation place: St Eustatius. Estimated mortality during the crossing: 2.0%. Recorded outcome: Voyage completed as intended.