German submarine U-18 (1935)

U-18 being re-assembled at Galați, Romania
History
Nazi Germany
Name	U-18
Ordered	2 February 1935
Builder	Germaniawerft, Kiel Galați shipyard, Romania
Yard number	548
Laid down	10 July 1935
Launched	7 December 1935
Commissioned	4 January 1936
Fate	Scuttled 25 August 1944 at Constanţa in the Black Sea[1]
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:	1st U-boat Flotilla 4 January – 20 November 1936 3rd U-boat Flotilla 30 September 1937 – 1 August 1939 1 September – 1 November 1939 U-boat Training Flotilla 1 November 1939 – 1 March 1940 1st U-boat Training Flotilla 1 April 1939 – 1 June 1940 24th U-boat Flotilla 1 July – 17 December 1940 22nd U-boat Flotilla 18 December 1940 – 18 August 1942 30th U-boat Flotilla 6 May 1943 – 25 August 1944
Identification codes:	M 23 452
Commanders:	Oblt.z.S. / Kptlt. Hans Pauckstadt 4 January – 20 November 1936 Kptlt. Heinz Beduhn 30 September – 31 October 1937 Oblt.z.S. / Kptlt. Max-Hermann Bauer 1 November 1937 – 24 November 1939 Oblt.z.S. Ernst Mengersen 24 November 1939 – 2 September 1940 Oblt.z.S. / Kptlt. Hans-Heinz Linder 3 September – 17 December 1940 Kptlt. Ernst Vogelsang 18 December 1940 – 6 May 1941 Lt.z.S. / Oblt.z.S. Hans-Achim von Rosenberg-Gruszcynski 7 May 1941 – 31 May 1942 Oblt.z.S. Friedrich-Wilhelm Wissmann 1 June – 18 August 1942 Oblt.z.S. Karl Fleige 6 May 1943 – 1 May 1944 Oblt.z.S. Hans-Jürgen Bartsch 2 – 25 May 1944 Oblt.z.S. Rudolf Arendt 25 May – 7 June 1944 Oblt.z.S. Karl Fleige 8 June – 25 August 1944
Operations:	14 patrols 1st patrol: a. 30 August – 7 September 1939 b. 8 September 1939 2nd patrol: 14 – 24 September 1939 3rd patrol: 2 – 19 October 1939 4th patrol: 15 – 23 November 1939 5th patrol: 18 – 26 January 1940 6th patrol: a. 11 – 24 February 1940 b. 27 – 28 February 1940 7th patrol: 26 May – 9 June 1943 8th patrol: a. 16 – 29 June 1943 b. 3 – 22 July 1943 9th patrol: 21 August – 24 September 1943 10th patrol: 27 October – 24 November 1943 11th patrol: 29 January – 29 February 1944 12th patrol: 25 March – 27 April 1944 13th patrol: 25 May – 7 June 1944 14th patrol: 24 July – 16 August 1944
Victories:	2 merchant ships sunk (1,500 GRT) 1 auxiliary warship sunk (400 GRT) 1 merchant ship damaged (7,745 GRT) 1 warship damaged (56 tons)

German submarine U-18 was a Type IIB U-boat of Nazi Germany's Kriegsmarine during World War II. It was laid down 10 July 1935 and commissioned on 4 January 1936. It served in many U-boat flotillas during its service.