SM UB-39 was a German Type UB II submarine or U-boat in the German Imperial Navy () during World War I.

Design A Type UB II submarine, UB-39 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 Körting 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-39 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.

Construction and career The U-boat was ordered on 22 July 1915 and launched on 28 December 1915. She was commissioned into the German Imperial Navy on 29 April 1916 as SM UB-38.

The submarine sank 93 ships in 14 patrols. UB-39 struck a mine and sank in the English Channel on 17 May 1917.

Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate10 July 1916Staffa176Sunk13 July 1916Dalhousie89Sunk13 July 1916Florence149Sunk13 July 1916Mary Ann5Sunk13 July 1916Success6Sunk14 July 1916Ben Aden176Sunk14 July 1916Bute176Sunk14 July 1916Girls Friend55Sunk14 July 1916Langley Castle93Sunk14 July 1916Recorder149Sunk1 August 1916Braconash192Sunk1 August 1916Helvetia167Sunk1 August 1916King James163Sunk1 August 1916Rhodesia110Sunk1 August 1916Tatiana285Sunk1 August 1916Zeeland1,292Sunk2 August 1916Olympia221Sunk2 August 1916Smiling Morn126Sunk2 August 1916Twiddler99Sunk3 August 1916Trawler Prince126Sunk3 August 1916Lucania92Sunk3 August 1916Merchant Prince130Sunk3 August 1916Destro859Damaged4 August 1916Jägersborg1,797Sunk4 August 1916Stamfordham921Sunk5 August 1916Egyptian Prince129Sunk5 August 1916St. Olive202Sunk6 September 1916Ancona1,168Damaged 6 September 1916Strathtay4,428Sunk6 September 1916Tagus937Sunk7 September 1916Marguerite102Sunk7 September 1916Alcyon163Sunk7 September 1916Heathdene3,541Sunk7 September 1916Messicano4,065Sunk8 September 1916Jeune Union267Sunk8 September 1916Lyderhorn939Sunk8 September 1916Olazarri2,585Sunk9 September 1916Europe356Sunk9 September 1916Pronto1,411Sunk10 September 1916Lexie3,778Sunk11 September 1916Fredavore1,577Sunk20 October 1916Midland4,247Sunk20 October 1916Secundo1,512Sunk21 October 1916Hebe775Sunk21 October 1916Helga1,182Sunk22 October 1916Alix1,584Sunk13 November 1916Corinth3,669Sunk28 November 1916Alert289Sunk28 November 1916Alison286Sunk28 November 1916Ramsgarth1,553Sunk29 November 1916Grace135Sunk29 November 1916Saint Philippe3,419Sunk30 November 1916Nagata Maru3,521Sunk30 November 1916Harald1,083Sunk1 December 1916Jeanne D’arc205Sunk2 December 1916Palacine3,286Sunk3 December 1916Primevere143Sunk6 December 1916Amicitia1,111Sunk7 December 1916Bravo1,214Sunk8 December 1916Rakiura3,569Sunk8 December 1916Rollo2,290Sunk8 December 1916Saga433Sunk28 December 1916Rouen1,656Damaged1 January 1917Holly Branch3,568Sunk1 January 1917Leon652Sunk2 January 1917Carlyle466Sunk3 January 1917Columbia34Sunk3 January 1917Diamant De La Couronne I36Sunk3 January 1917Diamant De La Couronne II34Sunk3 January 1917Formidable26Sunk3 January 1917Helgøy1,806Sunk3 January 1917Honneur Et Devouement26Sunk3 January 1917Jeanne Mathilde60Sunk3 January 1917La Pensee30Sunk3 January 1917Marie Henriette25Sunk3 January 1917Moderne38Sunk3 January 1917Pere Montfort13Sunk3 January 1917Pierre Le Grand42Sunk3 January 1917Richelieu25Sunk3 January 1917Saint Jacques34Sunk3 January 1917Saint Paul II30Sunk3 January 1917Petit Emile60Sunk4 January 1917Gabrielle Francois37Sunk5 January 1917Allie1,127Sunk5 January 1917Markland1,627Sunk4 February 1917Dauntless2,157Sunk5 February 1917Yvonne123Sunk10 February 1917Rancagua2,729Sunk23 March 1917Achille Adam460Sunk23 March 1917Clan Macmillan4,525Sunk23 March 1917Exchange279Sunk23 March 1917O. A. Knudsen3,532Damaged1 April 1917Silvia164Sunk5 April 1917Dicto2,363Sunk6 April 1917La Tour D’Auvergne188Sunk6 April 1917Perce Neige141Sunk9 April 1917Saint Maudez292Sunk

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