British tanker Arletta visited the Black Sea according to a letter of the German naval attaché at Istanbul dated 12 February 1940

In his letter dated Istanbul, Turkey 12 February 1940 No. 729 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 armed British tanker Arletta on 7 February 1940 with 6,670 ton petrol from Constanta, Romania towards Gibraltar for orders. Passing reported on 8 February. On the stern was a gun and 1 flak mounted. Her funnel was painted dark grey with in the middle a wide red painted band with the letter A. The upper part of the bridgehouse, superstructures on the stern and the 2 masts were yellow, all other parts dark grey.

Source

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