17 Nov, 1941
L-6 lays a minefield off Ak-Mechet, Crimea.

20 Jun, 1942
The romanian barge Danubius is sunk when it hits a mine off Ak Mechet, Crimea. The mine was laid by the Soviet submarine L-6 on 17 November 1941.

26 Dec, 1942
While on patrol off Karkinitski Bay, Crimea, L-6 fires 2 torpedoes against a convoy made up of the German merchant Saone and the German barges F 176 and F 341. The torpedoes missed their targets.

22 Mar, 1943
L-6 fires three torpedoes against the German barges F 469, F 342 and F 326 off Cape Chauda, Crimea in position 44º57'N, 35º51'E. All torpedoes missed their targets. (see map)

7 May, 1943
L-6 fires two torpedoes against the German tugs Baikal and Amur of the west coast of the Crimea in position 45º15'N, 32º52'E. Both torpedoes missed their targets. (see map)

11 Jun, 1943
L-6 lays a minefield west off Cape Lukull, Crimea.

25 Nov, 1943
L-6 torpedoes and sinks the small German tanker Wolga-Don (965 GRT) west of the Crimea in position 45º07'N, 32º08'E. (see map)

16 Apr, 1944
L-6 fires torpedoes against the Hungarian merchant Kassa (1022 GRT) in the Black Sea east of Constanta, Romania in position 44º17'N, 30º15'E. The torpedoes missed their target. (see map)

18 Apr, 1944
At 0708 hours L-6 once again fires torpedoes against the Hungarian merchant Kassa (1022 GRT) in the Black Sea in position 43º38'N, 32º13'E. The torpedoes missed their target.

At 1106 hours L-6 fires torpedoes against the Rumanian merchant Alba Julia (5700 BRT) in the Black Sea in position 43º28'N, 31º32'E. The Alba Julia was already damaged and on fire after being attacked by Soviet aircraft. The torpedoes fired by L-6 missed their target and L-6 was sunk during a counter attack. (see map)