sentences:  The boat returned to Beirut on 25 November.On 13 December, "Sickle" departed Beirut for another war patrol in the Aegean and attempted to attack a German convoy on 20 December.The next day, her periscope was sighted while looking into the harbour at Karlovasi, and she was attacked with depth charges by the German torpedo boats "TA14" and "TA15"; "Sickle" sustained significant damage, especially to her electric motors.