German submarine U-24 (1936)

U-9, a typical Type IIB boat
History
Nazi Germany
Name	U-24
Ordered	2 February 1935
Builder	Germaniawerft, Kiel Galați shipyard, Romania
Yard number	554
Laid down	21 April 1936
Launched	24 September 1936
Commissioned	10 October 1936
Fate	Scuttled on 25 August 1944, at Constanța in the Black Sea
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) C/30 anti-aircraft gun
Service record
Part of:	3rd U-boat Flotilla 1 October 1936 – 1 August 1939 1 September – 17 October 1939 1st U-boat Flotilla 18 October 1939 – 30 April 1940 1st U-boat Training Flotilla 1 May – 30 June 1940 21st U-boat Flotilla 1 July 1940 – 18 April 1942 30th U-boat Flotilla 14 October 1942 – 25 August 1944
Identification codes:	M 24 897
Commanders:	Oblt.z.S. Heinz Buchholz 3 July – 30 September 1937 Oblt.z.S. / Kptlt. Udo Behrens 8 October 1937 – 17 October 1939 Kptlt. Harald Jeppener-Haltenhoff 18 October – 29 November 1939 Oblt.z.S. Udo Heilmann 30 November 1939 – 21 August 1940 Oblt.z.S. Dietrich Borchert 22 August 1940 – 10 March 1941 Oblt.z.S. Helmut Hennig 11 March – 31 July 1941 Oblt.z.S. Hardo Rodler von Roithberg 1 August 1941 – 18 April 1942 Oblt.z.S. Klaus Petersen 14 October – 17 November 1942 Oblt.z.S. Clemens Schöler 18 November 1942 – 15 April 1943 Oblt.z.S. / Kptlt. Klaus Petersen 16 April 1943 – 7 April 1944 Oblt.z.S. Martin Landt-Hayen 7 April – July 1944 Dieter Lenzmann July – 25 Aug 1944
Operations:	19 patrols: 1st patrol: a. 25 – 31 August 1939 b. 2 – 5 September 1939 c. 6 September 1939 2nd patrol: 13 – 29 September 1939 3rd patrol: 12 – 14 October 1939 4th patrol: a. 23 – 29 October 1939 b. 30 October 1939 5th patrol: 6 – 12 January 1940 6th patrol: 27 January – 9 February 1940 7th patrol: a. 14 – 20 March 1940 b. 25 – 26 March 1940 c. 9 – 10 April 1940 8th patrol: a. 13 April – 5 May 1940 b. 6 – 7 May 1940 9th patrol: 27 October – 9 November 1942 10th patrol: 24 November – 16 December 1942 11th patrol: 18 January – 18 February 1943 12th patrol: a. 14 March – 3 April 1943 b. 10 – 15 April 1943 13th patrol: a. 5 – 26 June 1943 b. 27 – 29 June 1943 14th patrol: 26 July – 25 August 1943 15th patrol: a. 30 September – 18 October 1943 b. 20 October – 4 November 1943 16th patrol: 15 January – 10 February 1944 17th patrol: 4 March – 2 April 1944 18th patrol: 2 – 30 May 1944 19th patrol: a. 11 July 1944 b. 13 July – 4 August 1944
Victories:	1 merchant ship sunk (961 GRT) 5 warships sunk (573 tons) 1 merchant ship total loss (7,886 GRT) 1 merchant ship damaged (7.661 GRT)

German submarine U-24 was a Type IIB U-boat that was in service of Nazi Germany's Kriegsmarine during World War II. She was laid down on 21 April 1936 at the F. Krupp Germaniawerft in Kiel with yard number 554, launched on 24 September and commissioned into the Kriegsmarine on 10 October. Oberleutnant zur See Heinz Buchholz took command on 3 July 1937.