Dutch steam tanker Hermes visited the Black Sea according to a letter of the German naval attaché at Istanbul dated 27 January 1940

In his letter dated Istanbul, Turkey 27 January 1940 No. 690g. 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 the Dutch steam tanker Hermes of the Corona Patrol Maatchappij [Shell], The Hague.

Source

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