SM UC-22 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 29 August 1915 and was launched on 1 February 1916. She was commissioned into the German Imperial Navy on 30 June 1916 as SM UC-22."SM" stands for "Seiner Majestät" () and combined with the U for Unterseeboot would be translated as His Majesty's Submarine. In 15 patrols UC-22 was credited with sinking 23 ships, either by torpedo or by mines laid. UC-22 was surrendered to France on 3 February 1919 and was broken up at Landerneau in July 1921.
Design Like all pre-UC-25 Type UC II submarines, UC-22 had a displacement of when at the surface and while submerged. She had a length overall of , a beam of , and a draught of . The submarine was powered by two six-cylinder four-stroke diesel engines each producing (a total of ), two electric motors producing , and two propeller shafts. She had a dive time of 35 seconds and was capable of operating at a depth of .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . UC-22 was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one Uk L/30 deck gun. Her complement was twenty-six crew members.
Summary of raiding history DateNameNationalityTonnageMerchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.Fate28 September 1916Emma279Sunk29 November 1916Luciston2,948Sunk1 December 1916Burcombe3,516Sunk4 December 1916Algerie4,035Sunk28 December 1916Oronsay3,761Sunk30 December 1916Apsleyhall3,882Sunk1 January 1917Baycraig3,761Sunk27 February 1917Bellorado4,649Damaged3 April 1917Cloughton4,221Damaged3 April 1917Oberon5,142Damaged5 April 1917Agia20Sunk5 April 1917Evangelistria29Sunk5 April 1917Kyriotis19Sunk17 June 1917Aghios Georgios16Sunk20 June 1917Ariane414Sunk31 July 1917Regina70Sunk3 August 1917San Nicola30Sunk14 August 1917Julita641Sunk22 August 1917Golo II1,380Sunk20 January 19181,830Sunk, 224 killed25 January 1918Aghios Dimitrios50Sunk16 April 1918Romania2,562Sunk13 June 1918Octo1,620Sunk9 August 1918Girolamo Ciolino58Sunk10 August 1918Polynesien6,373Sunk27 August 1918Pampa4,471Sunk, 117 killed
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