British tanker British Ardour visited the Black Sea according to a letter of the German naval attaché at Istanbul dated 3 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 the British tanker British Ardour on 28 January with 10,470 ton petrol from Constanta, Romania towards Gibraltar for orders. Armed with 1 gun and 1 flak on the stern both behind the funnel. Also mine protection equipment.

Source

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