German submarine U-107 (1940)

	U-107 at Lorient in November 1941
History
Nazi Germany
Name	U-107
Ordered	24 May 1938
Builder	DeSchiMAG AG Weser, Bremen
Yard number	970
Laid down	6 December 1939
Launched	2 July 1940
Commissioned	8 October 1940
Homeport	Lorient, France
Fate	Sunk, 18 August 1944
General characteristics
Class and type	Type IXB U-boat
Displacement	1,051 t (1,034 long tons) surfaced; 1,178 t (1,159 long tons) submerged;
Length	76.50 m (251 ft) o/a; 58.75 m (192 ft 9 in) pressure hull;
Beam	6.76 m (22 ft 2 in) o/a; 4.40 m (14 ft 5 in) pressure hull;
Draught	4.70 m (15 ft 5 in)
Installed power	4,400 PS (3,200 kW; 4,300 bhp) (diesels); 1,000 PS (740 kW; 990 shp) (electric);
Propulsion	2 shafts; 2 × diesel engines; 2 × electric motors;
Speed	18.2 knots (33.7 km/h; 20.9 mph) surfaced; 7.3 knots (13.5 km/h; 8.4 mph) submerged;
Range	12,000 nmi (22,000 km; 14,000 mi) at 10 knots (19 km/h; 12 mph) surfaced; 64 nmi (119 km; 74 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged;
Test depth	230 m (750 ft)
Complement	48 to 56 officers and ratings
Armament	6 × torpedo tubes (4 bow, 2 stern); 22 × 53.3 cm (21 in) torpedoes; 1 × 10.5 cm SK C/32 naval gun (180 rounds); 1 × 3.7 cm (1.5 in) SK C/30 AA gun; 1 × twin 2 cm FlaK 30 AA guns;
Service record
Part of:	2nd U-boat Flotilla; 8 October 1940 – 18 August 1944;
Identification codes:	M 39 808
Commanders:	K.Kapt. Günter Hessler; 8 October 1940 – 1 December 1941; Kptlt. Harald Gelhaus; 1 December 1941 – 6 June 1943; Kptlt. Volker Simmermacher; July 1943 – August 1944; Lt.z.S. Karl-Heinz Fritz; August – 18 August 1944;
Operations:	13 patrols:; 1st patrol:; 24 January – 1 March 1941; 2nd patrol:; 29 March – 2 July 1941; 3rd patrol:; 6 September – 11 November 1941; 4th patrol:; 10 – 26 December 1941; 5th patrol:; 7 January – 7 March 1942; 6th patrol:; 21 April – 11 July 1942; 7th patrol:; 15 August – 18 November 1942; 8th patrol:; 30 January – 25 March 1943; 9th patrol:; 24 April – 26 May 1943; 10th patrol:; a. 28 July – 3 October 1943; b. 10 – 12 November 1943; 11th patrol:; a. 16 November 1943 – 8 January 1944; b. 30 April – 2 May 1944; 12th patrol:; 10 May – 23 July 1944; 13th patrol:; 16 – 18 Aug 1944;
Victories:	37 merchant ships sunk ; (207,375 GRT); 2 auxiliary warships sunk ; (10,411 GRT); 3 merchant ships damaged ; (17,392 GRT); 1 auxiliary warship damaged ; (8,246 GRT);

German submarine U-107 was a Type IXB U-boat of Nazi Germany's Kriegsmarine that operated during World War II. Between January 1941 and August 1944, she sailed on 13 active patrols at a time when a U-boat averaged a lifespan of seven to ten patrols. During that time, U-107 sank 39 Allied ships and damaged four. The U-boat was launched on 2 July 1940, based at the U-boat port of Lorient, with a crew of 53 under the initial command of Günter Hessler. She was later commanded, in order, by Harald Gelhaus, Valker Simmermacher and her final commander, Karl Heinz Fritz.

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