SM UB-34 was a German Type UB II submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 22 July 1915 and launched on 5 December 1915. She was commissioned into the German Imperial Navy on 10 June 1916 as SM UB-34.
UB-34 sank 31 ships in 21 patrols. They included the William Cory and Son collier SS Hurstwood, which UB-34 torpedoed and sank in the North Sea off Whitby on 5 February 1917.
The submarine served in the Training Flotilla at the end of the war and was surrendered on 26 November 1918 in accordance with the requirements of the Armistice with Germany. UB-34 was broken up in Canning Town in 1922.
Design A Type UB II submarine, UB-34 had a displacement of when at the surface and while submerged. She had a total length of , a beam of , and a draught of . The submarine was powered by two Benz six-cylinder diesel engines producing a total , two Siemens-Schuckert electric motors producing , and one propeller shaft. She was capable of operating at depths of up to .
The submarine had a maximum surface speed of and a maximum submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . UB-34 was fitted with two torpedo tubes, four torpedoes, and one Uk L/30 deck gun. She had a complement of twenty-one crew members and two officers and a 42-second dive time.
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate21 October 1916Ull1,139Sunk22 October 1916Effort159Sunk23 October 1916Regina823Sunk26 October 1916Titan171Sunk18 December 1916Arran176Sunk19 December 1916Ansgar926Sunk19 December 1916Kornmo591Sunk19 December 1916Bretland2,025Captured as prize20 December 1916Eva109Sunk20 December 1916Mereddio1,372Sunk5 February 1917Hurstwood1,229Sunk6 February 1917Ferruccio2,192Sunk7 February 1917Corsican Prince2,776Sunk7 February 1917Saint Ninian3,026Sunk25 April 1917Este1,420Sunk7 September 1917Grelfryda5,136Damaged8 September 1917Aladdin753Sunk27 September 1917Greltoria5,143Sunk29 September 1917Bertha185Captured as prize27 October 1917Lady Helen811Sunk13 December 1917Bangarth1,872Sunk15 December 1917Dafni1,190Sunk24 January 1918HMT Desire135Sunk24 January 1918X6160Sunk24 January 1918X110160Sunk25 January 1918Folmina1,158Sunk25 January 1918Humber280Sunk26 January 1918Hartley1,150Sunk26 January 1918Athos1,708Sunk9 March 1918Randelsborg1,551Sunk13 March 1918Adine2,235Sunk16 March 1918Quintero1,611Sunk21 April 1918Lompoc7,270Damaged10 June 1918Lowtyne3,231Sunk22 September 1918HMT Elise239Sunk
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