SM U - 10 ( Austria - Hungary ) SM " U - 10 or U - X was the lead boat of the " U - 10 " class of submarine s for the Austro - Hungarian Navy ( ) during World War I . She was originally a German Type UB I submarine commissioned into the German Imperial Navy ( ) as SM " UB - 1 . SM " UB - 1 " was constructed in Germany and shipped by rail to Pola where she was assembled and launched in January 1915 . She was commissioned into the German Imperial Navy later that same month and sank an Italian torpedo boat in June . The boat was handed over to Austria - Hungary and commissioned as SM " U - 10 " in July . In May 1917 , " U - 10 " was fired upon by a British submarine , but both of the torpedoes that were launched missed . In July 1918 , " U - 10 " hit a mine and was beached with heavy damage . She was towed to Trieste for repairs which remained unfinished at the war ' s end . " U - 10 " was handed over to Italy as a war reparation and scrapped in 1920 . Design and construction . " U - 10 " was a small , coastal submarine that displaced surfaced and submerged . She featured a single shaft , a single Daimler diesel engine for surface running , and a single electric motor for submerged travel . " U - 10 " was capable of up to while surfaced and while submerged at a diving depth of up to . She was designed for a crew of 17 officers and men . " U - 10 " was equipped with two torpedo tubes located in the front and carried a complement of two torpedoes . German Type UB I submarines were additionally equipped with a machine gun , but it is not clear from sources if " U - 10 " , as a former German boat , was either equipped with one or , if so , retained it in Austro - Hungarian service . In October 1916 , " U - 10 " s armament was supplemented with a 37 - mm / 23 ( 1 . 5 in ) quick - firing ( QF ) gun . This gun was replaced by a 47 - mm / 23 ( 1 . 9 in ) QF gun in November 1917 . Construction of " UB - 1 " was started on 1 November 1914 at Germaniawerft in Kiel . After her assembly was complete " UB - 1 " was launched on 22 January 1915 . After extended negotiations between Austro - Hungary and Germany , in March 1915 it was decided for Germany to supply five submarines of the " UB I " type . This model was familiar to the Austro - Hungary Navy since the Imperial German Navy had reassembled " UB3 " , " UB 8 " , and " UB 9 " at the Pola factory . The first boat was bought on April 4 , 1915 , a " sample " " UB 1 " boat . This submarine was shipped by rail in sections to Pola , where the sections were riveted together . Though there is no record of how long it took for " UB - 1 " s parts to be assembled , a sister boat , " UB - 3 " , shipped from Germany in mid - April 1915 , was assembled in about two weeks . Operational history . SM " UB - 1 " was commissioned into the German Imperial Navy under the command of " Oberleutnant zur See " Franz Wäger on 29 January . An Austro - Hungarian Navy officer was assigned to the boat for piloting and training purposes . On 26 June 1915 , " UB - 1 " sank an Italian torpedo boat " Torpediniere 5 Pn " in the Gulf of Venice . On 4 June 1915 , after being disassembled into three sections and transported by rail to Pola for reassembling , " UB - 1 " was handed over to the Austro - Hungarian Navy and commissioned as " U - 10 " under the command of " Linienschiffsleutnant " Karl Edler von Unczowski . British submarine had an encounter with " U - 10 " on 11 May 1917 . While cruising off Pola , " H4 " came across " U - 10 " and fired a spread of two torpedoes at the submarine . The torpedoes were aimed to be 5° apart at a distance of which was apparently too wide , because the captain of " H4 " observed the torpedoes miss just ahead and just astern of " U - 10 " . On 9 July 1918 , " U - 10 " hit an Italian mine near Caorle in the northern Adriatic Sea at position , and was beached with heavy damage . Although she was looted by Austro - Hungarian Army troops , she was later towed to Trieste for repairs , which remained unfinished at war ' s end ; all of the 13 crew personnel were saved . " U - 10 " was handed over to Italy as a war reparation and scrapped at Pola by 1920 . " U - 10 " sank no ships in her Austro - Hungarian service .