From mid-June to mid-August of 1942 she participated in several counter-operations against British units in the Mediterranean (Operation "Harpoon", Operation "Pedestal"), but without much success. During Operation "Harpoon" "Uarschiek" together with several other submarines was stationed north of Algerian coast. On 13 June 1942 she sighted the ships of Force X and attempted an attack, but it proved to be unsuccessful. At 4:38 on 11 August 1942 "Uarsciek", now under the command of captain Gaetano Arezzo della Targia, sighted and attacked British aircraft carrier with three torpedoes, but attack was unsuccessful. She was then depth charged for several hours but managed to come out unscathed and surfaced at 9:30. On 13 August 1942, in the evening, she was attacked by an aircraft, damaged and forced to return. For this action and above all for the aggressive spirit with which the new captain had led his ship in this attack on the British convoy, Gaetano Arezzo della Targia was decorated with the Silver Medal of Military Valor.