At the beginning of August 1942 "Dagabur", now under command of captain Renato Pecori, left Cagliari and was sent to patrol an area between Ibiza and Mallorca and northern coast of Algeria. On August 10, 1942, she was ordered to report sightings of enemy units, but not attack any ships until after the start of the British Operation "Pedestal". On August 11, 1942, she sighted British Force, part of Operation "Bellows", including British aircraft carrier and eight destroyers south of the Balearic Islands. "Dagabur" attempted to maneuver into approach on the surface but was spotted and attacked and rammed by destroyer and sank with all hands in the position on August 12. was also damaged in the collision, and had to be escorted back to Gibraltar for repairs.