German submarine U-22 was a Nazi German Type IIB U-boat which was commissioned in 1936 following construction at the Germaniawerft shipyards at Kiel. Her pre-war service was uneventful, as she trained crews and officers in the rapidly expanding U-boat arm of the Kriegsmarine following the abandonment of the terms of the Treaty of Versailles two years before.

Quick Facts History, Nazi Germany ...

U-9, a typical Type IIB boat
History
Nazi Germany
Name	U-22
Ordered	2 February 1935
Builder	Germaniawerft, Kiel
Yard number	552
Laid down	4 March 1936
Launched	29 July 1936
Commissioned	20 August 1936
Fate	Missing since 27 March 1940, in the North Sea around Skagerrak. 27 presumed dead
General characteristics
Class and type	Type IIB coastal submarine
Displacement	279 t (275 long tons) surfaced 328 t (323 long tons) submerged
Length	42.70 m (140 ft 1 in) o/a 27.80 m (91 ft 2 in) pressure hull
Beam	4.08 m (13 ft 5 in) (o/a) 4.00 m (13 ft 1 in) (pressure hull)
Height	8.60 m (28 ft 3 in)
Draught	3.90 m (12 ft 10 in)
Installed power	700 PS (510 kW; 690 bhp) (diesels) 410 PS (300 kW; 400 shp) (electric)
Propulsion	2 shafts 2 × diesel engines 2 × electric motors
Speed	13 knots (24 km/h; 15 mph) surfaced 7 knots (13 km/h; 8.1 mph) submerged
Range	1,800 nmi (3,300 km; 2,100 mi) at 12 knots (22 km/h; 14 mph) surfaced 35–43 nmi (65–80 km; 40–49 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	80 m (260 ft)
Complement	3 officers, 22 men
Armament	3 × 53.3 cm (21 in) torpedo tubes 5 × torpedoes or up to 12 TMA or 18 TMB mines 1 × 2 cm (0.79 in) anti-aircraft gun
Service record
Part of:	3rd U-boat Flotilla 1 August 1936 – 1 August 1939 1 September – 31 December 1939 1st U-boat Flotilla 1 January – 27 March 1940
Identification codes:	M 26 177
Commanders:	Kptlt. Harald Grosse 23 December 1936 – 4 October 1937 Kptlt. Werner Winter 1 October 1937 – 3 October 1939 Kptlt. Karl-Heinrich Jenisch 4 October 1939 – 27 March 1940
Operations:	7 patrols: 1st patrol: 26 August – 9 September 1939 2nd patrol: a. 27 – 30 September 1939 b. 2 – 3 October 1939 3rd patrol: 15 – 24 November 1939 4th patrol: 13 – 24 December 1939 5th patrol: 15 – 24 January 1940 6th patrol: 8 – 25 February 1940 7th patrol: 20 – 27 March 1940
Victories:	6 merchant ships sunk (7,344 GRT) 1 warship sunk (1,475 tons) 2 auxiliary warships sunk (3,633 GRT)

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German Type IIB submarines were enlarged versions of the original Type IIs. U-22 had a displacement of 279 tonnes (275 long tons) when at the surface and 328 tonnes (323 long tons) while submerged. Officially, the standard tonnage was 250 long tons (250 t), however.^[1] The U-boat had a total length of 42.70 m (140 ft 1 in), a pressure hull length of 28.20 m (92 ft 6 in), a beam of 4.08 m (13 ft 5 in), a height of 8.60 m (28 ft 3 in), and a draught of 3.90 m (12 ft 10 in). The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of 700 metric horsepower (510 kW; 690 shp) for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of 460 metric horsepower (340 kW; 450 shp) for use while submerged. She had two shafts and two 0.85 m (3 ft) propellers. The boat was capable of operating at depths of up to 80–150 metres (260–490 ft).^[1]

The submarine had a maximum surface speed of 12 knots (22 km/h; 14 mph) and a maximum submerged speed of 7 knots (13 km/h; 8.1 mph).^[1] When submerged, the boat could operate for 35–42 nautical miles (65–78 km; 40–48 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 3,800 nautical miles (7,000 km; 4,400 mi) at 8 knots (15 km/h; 9.2 mph). U-22 was fitted with three 53.3 cm (21 in) torpedo tubes at the bow, five torpedoes or up to twelve Type A torpedo mines, and a 2 cm (0.79 in) anti-aircraft gun. The boat had a complement of twentyfive.^[1]

During the Second World War, she was mainly deployed for coastal work, a role enforced by her small size and endurance. Thus she was useful for operations in the North Sea and against the British coastal convoys, particularly along the north east seaboard of Great Britain. It was in this region that she scored her first successes, after fruitless operations off the Polish coast during the invasion of that country and a patrol against British shipping coming from Norwegian ports.

On 18 November 1939, she scored her first kill, sinking the trawler Wigmore off the Scottish coast. In December 1940 she laid mines off Blyth, in Northumberland, which claimed two coastal freighters and a naval patrol minesweeper in less than a week.^[2] She was then used directly against Scottish convoys in the Moray Firth,^[3] during which she achieved her greatest success, torpedoing the British destroyer HMS Exmouth, which went down with all hands, the cause of her loss only discovered by the British after the war. Shortly afterwards, in thick fog, she sank a Danish ship from the same convoy. These were her final direct victims, although she later claimed another with a mine laid sometime before.

The submarine failed to return from her seventh patrol, for which she had departed on 20 March 1940. There is some indication that she was lost due to an unexplained mine detonation in the Skagerrak.^[4] Some suggested,^[who?] that she might have been rammed by the Polish submarine Wilk, which reported crashing into something, but it was a month later (20 June) and newest analyses show, that the Wilk most probably collided with a buoy.^[5] Whatever the cause, U-22 and her 27 crew were never seen again, lost somewhere in the North Sea in March 1940.