SM U - 92 SM " U - 92 " was one of 329 submarine s serving in the Imperial German Navy in World War I . She was engaged in the commerce warfare in the First Battle of the Atlantic . Construction of " U - 92 " was ordered in August 1915 , and her keel was laid in August 1916 at the Kaiserliche Werft yard in Danzig . She was launched in October 1917 , and sunk by mine 9 September 1918 . Operations . After acceptance trials at Danzig ( where she was first detected by Room 40 , which followed and recorded all her subsequent movements ) , commanded by Kapitänleutnant ( Lieutenant ) Bieler . She joined the Kiel School 2 November 1917 , leaving for the North Sea about the end of December 1917 , being attached to the 3rd Flotilla at Wilhelmshaven . All her combat operations took place in 1918 . " U - 92 " departed for her first war patrol 1 January , " via " Heligoland Bight and around Scotland into the northern Bay of Biscay , recording no sinkings , and returning to Wilhelmshaven 30 January . Her second patrol began 24 February , and she was assigned to a station southwest of Ireland , transiting the Kiel Canal and the Baltic Sea , due to heavy mining in the North Sea . Again , she scored no victories , but was in the vicinity of Skaw , at the time the commerce raider " Wolf " stranded a prize , " Igotz Mendi " , for two days . She also torpedoed the 7034 - ton steamer " British Princess " , killing one British seaman , and inflicting damage , none severe enough to keep her victim from reaching port . " U - 92 " returned to Kiel on 23 March . After refit , " U - 92 " departed on her third patrol 24 April . She was again assigned to the southwest Ireland station , by way of Heligoland , the Kiel Canal , the Baltic , Denmark , Scotland , and Fair Isle . On this long patrol , from which she returned to Wilhelmshaven on about 28 May ( Room 40 was uncertain of the date ) , she was attacked three times by enemy A / S forces ( and once more by patrol seaplane ) , and again scored no successes . On his return , after his third consecutive dry patrol and in keeping with usual practise for unproductive skippers , " Kptlt " . Bieler was relieved . " U - 92 " returned to Ireland station for her fourth patrol , sortieing 29 June , now in the hands of " Kaplt " . Günther Ehrlich . She came under attack on only the second day of her patrol , south of Dogger Bank , by two torpedoes from submarine " E42 " , Both missed . " U - 92 " attacked a convoy eight days later , on 9 July . She sank two armed steamers , the 2814 ton " Ben Lomond " southeast of Daunts Rock and the 3550 ton " Mars " west by north of Bishop Rock . and suffered damage in a collision . On 10 July , she fired on the 339 ton armed schooner " Charles Theriault " with her deck gun , inflicting damage ; " Theriault " was towed to port . The next day she torpedoed and sank the 5590 - ton United States Navy cargo ship at with the loss of 11 members of " Westover " s crew , and on 13 July , the 3058 - ton Spanish steamer " S . S . Ramon de Larrinaga " with two torpedoes . By the end of her patrol , on 22 July , she had sunk 22 , 000 tons of shipping . For her fifth patrol , she left " via " Kattegat on 4 September . She was mine d 9 September in Area B of the North Sea Mine Barrage , and lost with all hands ; her last position was suspected to be . " At the end of 2007 , her wreck was located there by 2007 by the British Maritime and Coastguard Agency ship " Anglian Sovereign " .