# SM UB-22

SM UB-22 was a German Type UB II submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 30 April 1915 and launched on 9 October 1915. She was commissioned into the German Imperial Navy on 2 March 1915 as SM UB-22. The submarine sank 27 ships in 18 patrols for a total of 16,645 gross register tons (GRT). UB-22 was mined and sunk in the same incident with the torpedoboat SMS S16 in the North Sea at 54°40′N 6°32′E﻿ / ﻿54.667°N 6.533°E﻿ / 54.667; 6.533 on 19 January 1918 in a British minefield.

## Design

A Type UB II submarine, UB-22 had a displacement of 263 tonnes (259 long tons) when at the surface and 292 tonnes (287 long tons) while submerged. She had a total length of 36.13 m (118 ft 6 in), a beam of 4.36 m (14 ft 4 in), and a draught of 3.70 m (12 ft 2 in). The submarine was powered by two Körting six-cylinder, four-stroke diesel engines each producing a total 280 metric horsepower (280 shp; 210 kW), a Siemens-Schuckert electric motor producing 206 kilowatts (276 shp; 280 PS), and one propeller shaft. She was capable of operating at depths of up to 50 metres (160 ft).
The submarine had a maximum surface speed of 9.15 knots (16.95 km/h; 10.53 mph) and a maximum submerged speed of 5.81 knots (10.76 km/h; 6.69 mph). When submerged, she could operate for 45 nautical miles (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 6,650 nautical miles (12,320 km; 7,650 mi) at 5 knots (9.3 km/h; 5.8 mph). UB-22 was fitted with two 50 centimetres (20 in) torpedo tubes, four torpedoes, and one 5 cm (2.0 in) SK L/40 deck gun. She had a complement of twenty-one crew members and two officers and a 45-second dive time.

## Summary of raiding history

| Date | Name | Nationality | Tonnage | Fate |
| 20 October 1916 | Drafn | Norway | 774 | Sunk |
| 21 October 1916 | Antoinette | Sweden | 912 | Sunk |
| 21 October 1916 | Theodor | Norway | 234 | Sunk |
| 22 October 1916 | Caerloch | Norway | 659 | Sunk |
| 22 October 1916 | Gunn | Norway | 483 | Sunk |
| 27 October 1916 | Sif | Denmark | 377 | Sunk |
| 29 October 1916 | Falkefjell | Norway | 1,131 | Sunk |
| 5 February 1917 | Resolute | United Kingdom | 125 | Sunk |
| 6 February 1917 | Adelaide | United Kingdom | 133 | Sunk |
| 6 February 1917 | Romeo | United Kingdom | 114 | Sunk |
| 6 February 1917 | Rupert | United Kingdom | 114 | Sunk |
| 7 February 1917 | Boyne Castle | United Kingdom | 245 | Sunk |
| 7 February 1917 | Shakespeare | United Kingdom | 210 | Sunk |
| 9 February 1917 | Benbow | United Kingdom | 172 | Sunk |
| 9 February 1917 | Duke of York | United Kingdom | 150 | Sunk |
| 10 February 1917 | Athenian | United Kingdom | 171 | Sunk |
| 10 February 1917 | Bellax | Norway | 1,107 | Sunk |
| 10 February 1917 | Ireland | United Kingdom | 152 | Sunk |
| 28 March 1917 | Oakwell | United Kingdom | 248 | Sunk |
| 29 April 1917 | Dilston Castle | United Kingdom | 129 | Sunk |
| 30 April 1917 | Argo | United Kingdom | 131 | Sunk |
| 16 June 1917 | Inge | Denmark | 336 | Sunk |
| 4 August 1917 | Azira | United Kingdom | 1,144 | Sunk |
| 6 August 1917 | Jenny | Denmark | 293 | Sunk |
| 6 August 1917 | Narcissus | United Kingdom | 58 | Sunk |
| 7 November 1917 | Suntrap | United Kingdom | 1,353 | Sunk |
| 13 December 1917 | Garthwaite | United Kingdom | 5,690 | Sunk |