The slave ship Otter departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Puerto Rico.

Vessel: Otter; flag: Great Britain; rig: Ship; estimated standardized tonnage: 365.3. People recorded in connection with the voyage: Captain: Mason; Investor: Mason; Captain: Bold, Arthur; Investor: Bold, Arthur; Captain: Linecar, Samuel. The voyage began at London on 6 May 1766. Principal recorded place where captives were acquired: Bonny (Bight of Biafra and Gulf of Guinea islands). Principal recorded disembarkation place: Puerto Rico, port unspecified. Estimated mortality during the crossing: 9.0%. Recorded outcome: Voyage completed as intended.