 One person died, while 16 survivors were picked up by and landed at Kirkwall the next day.In 16 patrols "U-23" sank seven ships for a total of including two warships, as well as damaging a warship and an auxiliary warship.Over the course of her service with the "Kriegsmarine", "U-23" had ten commanding officers, the most famous of whom was "Kapitänleutnant" Otto Kretschmer, who went on to become the top scoring U-boat ace.