British cargo ship Hanne visited the Black Sea according to a letter of the German naval attaché at Istanbul dated3 February 1940

In his letter dated Istanbul, Turkey 3 February 1940 No. 712 g. reported the German naval attaché to the Oberkommando der Wehrmacht Abteilung Ausland the neutral ships passing Istanbul coming out of the Black Sea and loaded with contraband for or chartered by the enemy. An item reported on 28 January the British cargo ship Hanne loaded with 825 ton mais, 110 cattle and 16,000 live winged underway from Constanta, Romania towards Haifa, Palestina. Unarmed.

Source

Bundesarchiv. German Marineattaché for , Greece, Romania and Bulgaria 1939-1941. RM 12-II/459.