SM UC-22 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) 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.[1] 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.
Like all pre-UC-25 Type UC II submarines, UC-22 had a displacement of 417t when at the surface and 493t while submerged. She had a length overall of 49.35m (161.91feet), a beam of 5.22m (17.13feet), and a draught of 3.650NaN0. The submarine was powered by two six-cylinder four-stroke diesel engines each producing 250PS (a total of 500PS), two electric motors producing 460PS, 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 8.8sp=usNaNsp=us Uk L/30 deck gun. Her complement was twenty-six crew members.
| Date | Name | Nationality | Tonnage[2] | Fate[3] | |
|---|---|---|---|---|---|
| 28 September 1916 | Emma | 279 | Sunk | ||
| 29 November 1916 | Luciston |  United Kingdom | 2,948 | Sunk | |
| 1 December 1916 | Burcombe | United Kingdom | 3,516 | Sunk | |
| 4 December 1916 | Algerie |  France | 4,035 | Sunk | |
| 28 December 1916 | Oronsay | United Kingdom | 3,761 | Sunk | |
| 30 December 1916 | Apsleyhall | United Kingdom | 3,882 | Sunk | |
| 1 January 1917 | Baycraig | United Kingdom | 3,761 | Sunk | |
| 27 February 1917 | Bellorado | United Kingdom | 4,649 | Damaged | |
| 3 April 1917 | Cloughton | United Kingdom | 4,221 | Damaged | |
| 3 April 1917 | Oberon | United Kingdom | 5,142 | Damaged | |
| 5 April 1917 | Agia |  Greece | 20 | Sunk | |
| 5 April 1917 | Evangelistria | Greece | 29 | Sunk | |
| 5 April 1917 | Kyriotis | Greece | 19 | Sunk | |
| 17 June 1917 | Aghios Georgios | Greece | 16 | Sunk | |
| 20 June 1917 | Ariane | 414 | Sunk | ||
| 31 July 1917 | Regina | Greece | 70 | Sunk | |
| 3 August 1917 | San Nicola | 30 | Sunk | ||
| 14 August 1917 | Julita |  Spain | 641 | Sunk | |
| 22 August 1917 | Golo II | 1,380 | Sunk | ||
| 20 January 1918 | 1,830 | Sunk, 224 killed | |||
| 25 January 1918 | Aghios Dimitrios | Greece | 50 | Sunk | |
| 16 April 1918 | Romania | 2,562 | Sunk | ||
| 13 June 1918 | Octo |  Norway | 1,620 | Sunk | |
| 9 August 1918 | Girolamo Ciolino | 58 | Sunk | ||
| 10 August 1918 | Polynesien | France | 6,373 | Sunk | |
| 27 August 1918 | Pampa | France | 4,471 | Sunk, 117 killed |