SM U - 67 SM " U - 67 was a Type U 66 submarine or U - boat for the German Imperial Navy ( ) during the First World War . She had been laid down in November 1913 as U - 8 " the second boat of the " U - 7 " class for the Austro - Hungarian Navy ( ) but was sold to Germany , along with the others in her class , in November 1914 . The submarine was ordered as " U - 8 " from Germaniawerft of Kiel as the second of five boats of the " U - 7 " class for the Austro - Hungarian Navy . After the outbreak of World War I in August 1914 , the Austro - Hungarian Navy became convinced that none of the submarines of the class could be delivered to the Adriatic via Gibraltar . As a consequence , the entire class , including " U - 8 " , was sold to the German Imperial Navy in November 1914 . Under German control , the class became known as the U 66 type and the boats were renumbered ; " U - 8 " became " U - 67 " , and all were redesigned and reconstructed to German specifications . " U - 67 " was launched in May 1915 and commissioned in August . As completed , she displaced , surfaced , and , submerged . The boat was long and was armed with five torpedo tubes and a deck gun . A part of the 4th Flotilla throughout the war , " U - 67 " sank 18 ships with a combined gross register tonnage ( GRT ) of 39 , 937 in thirteen war patrols . She also damaged three other ships of . On 20 November 1918 , nine days after the Armistice , " U - 67 " was surrendered to the British . She was broken up in 1921 at Fareham . Design and construction . After the Austro - Hungarian Navy had competitively evaluated three foreign submarine designs , it selected the Germaniawerft 506d design , also known as the Type UD , for its new " U - 7 " class of five submarines . The Navy ordered five boats on 1 February 1913 . The " U - 7 " class was seen by the Austro - Hungarian Navy as an improved version of its " U - 3 " class , which was also a Germaniawerft design . As designed for the Austro - Hungarian Navy , the boats were to displace on the surface and while submerged . The doubled - hulled boats were to be long ( OA ) with a beam of and a draft of . The Austrian specifications called for two shafts with twin diesel engines ( total ) for surface running at up to , and twin electric motors ( total ) for a maximum of when submerged . The boats were designed with five torpedo tubes ; four located in the bow , one in the stern . The boats ' armament was to also include a single 66 cm / 26 ( 2 . 6 in ) deck gun . " U - 8 " and sister boat were both laid down on 1 November 1913 , the first two boats of the class begun . Her construction was slated to be complete within 29 to 33 months . Neither " U - 8 " nor any of her sister boats were complete when World War I began in August 1914 . With the boats under construction at Kiel , the Austrians became convinced that it would be impossible to take delivery of the boats , which would need to be towed into the Mediterranean past Gibraltar , a British territory . As a result , " U - 8 " and her four sisters were sold to the Imperial German Navy on 28 November 1914 . " U - 8 " was renumbered by the Germans as " U - 67 " when her class was redesignated as the Type U 66 . The Imperial German Navy had the submarines redesigned and reconstructed to German standards , which increased the surface displacement by and the submerged by . The torpedo load was increased by a third , from 9 to 12 , and the deck gun was upgraded from the gun originally specified to an one . Service career . " U - 67 " was launched on 15 May 1915 . On 4 August , SM " U - 67 " was commissioned into the " Kaiserliche Marine " under the command of " Korvettenkapitän " Erich von Rosenberg - Grusczyski . On 28 October 1915 , " U - 67 " was assigned to the IV . " U - Halbflotille " in which she remained for the duration of the war . In March 1916 , " Kapitänleutnant " Hans Nieland replaced von Rosenberg - Grusczyski as the captain of " U - 67 " , and it was under his command that " U - 67 " was most successful , sinking 18 ships with a combined a total of , while damaging a further three of 14 , 766 tons . " U - 67 " s most successful month was April 1917 , when she sank four ships of 15 , 223 tons in a span of twelve days . Nieland was succeeded as commander of " U - 67 " by " Oberleutnant zur See " Helmuth von Rabenau in December 1917 . Under his command during the last eleven months of the war , " U - 67 " sank no more ships . During her service career under three commanders , " U - 67 " had completed thirteen war patrols . She was surrendered to the British on 20 November 1918 , nine days after the Armistice , and broken up at Fareham in 1921 . Ships sunk or damaged . < nowiki > * < / nowiki > damaged but not sunk < br >