SM UB-19 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 30 April 1915 and launched on 2 September 1915. She was commissioned into the German Imperial Navy on 16 December 1915 as SM UB-19. The submarine sank 13 ships in 15 patrols for a total of . UB-19 was sunk in the English Channel at on 30 November 1916 by British Q ship (Q 7).
Design A Type UB II submarine, ‘’UB-19’’ had a displacement of when at the surface and while submerged. They had a length overall of , a beam of , and a draught of . The submarine was powered by two Daimler six-cylinder four-stroke diesel engines each producing (a total of ), two Siemens-Schuckert electric motors producing , and one propeller shaft. She had a dive time of 32 seconds and was capable of operating at a depth of .
The submarine's top submerged speed was 5.81 knots and its top surface speed was 9.15 knots (16.95 km/h; 10.53 mph). When submerged, she could operate for at ; when surfaced she could travel at . UB-19 was fitted with two torpedo tubes in the bow, four torpedoes, and one Tk L/40 deck gun. Her complement was twenty-three crew members.
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate18 May 1916Osprey18Sunk24 July 1916Mars106Sunk10 August 1916San Bernardo3,803Sunk4 October 1916Jennie Bullas26Sunk4 October 1916Jersey162Sunk4 October 1916Rado182Sunk5 October 1916Rover42Sunk25 October 1916Comtesse De Flandre1,810Sunk26 October 1916Iduna165Sunk10 November 1916Koningin Regentes1,970Captured as prize23 November 1916Ernaston3,020Damaged24 November 1916Jerseyman358Sunk27 November 1916Belle Ile1,884Sunk27 November 1916Visborg1,343Sunk30 November 1916Behrend141Sunk
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