The slave ship Haast U Langzaam departed from Suriname after the slave-trading stage of the voyage.

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 June 1777. Principal recorded place where captives were acquired: Cape Lahou (Windward Coast). Principal recorded disembarkation place: Suriname, place unspecified. Estimated mortality during the crossing: 3.0%. Recorded outcome: Voyage completed as intended.