Heinz Bielfeld

History
Nazi Germany
Name:	U-703
Ordered:	9 October 1939
Builder:	HC Stülcken & Sohn, Hamburg
Yard number:	762
Laid down:	9 August 1940
Launched:	16 July 1941
Commissioned:	16 October 1941
Status:	Missing since c. 25 September 1944
General characteristics
Class and type:	Type VIIC submarine
Displacement:	769 tonnes (757 long tons) surfaced 871 t (857 long tons) submerged
Length:	67.10 m (220 ft 2 in) o/a 50.50 m (165 ft 8 in) pressure hull
Beam:	6.20 m (20 ft 4 in) o/a 4.70 m (15 ft 5 in) pressure hull
Height:	9.60 m (31 ft 6 in)
Draught:	4.74 m (15 ft 7 in)
Installed power:	2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels) 750 PS (550 kW; 740 shp) (electric)
Propulsion:	2 shafts 2 × diesel engines 2 × electric motors
Speed:	17.7 knots (32.8 km/h; 20.4 mph) surfaced 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range:	8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	230 m (750 ft) Crush depth: 250–295 m (820–968 ft)
Complement:	4 officers, 40–56 enlisted
Armament:	5 × 53.3 cm (21 in) torpedo tubes (four bow, one stern) 14 × torpedoes 1 × 8.8 cm (3.46 in) deck gun (220 rounds) 1 x 2 cm (0.79 in) C/30 AA gun
Service record
Part of:	Kriegsmarine: 6th U-boat Flotilla (1941 – 1942) 11th U-boat Flotilla (1942 – 1943) 13th U-boat Flotilla (1943 – 1944)
Commanders:	Kptlt. Heinz Bielfeld October 1941 – July 1943 Oblt.z.S. Joachim Brümmer July 1943 – September 1944
Operations:	13 patrols; 6th Flotilla 26 April – 7 May 1942 16–30 May 1942 11th Flotilla 29 June – 15 July 1942 8 August – 11 September 1942 14–26 September 1942 1 January – 14 February 1943 7 March – 5 April 1943 13th Flotilla 19 July – 3 August 1943 17 August – 9 September 1943 29 February – 8 March 1944 9–29 April 1944 21 August – 10 September 1944 14 September 1944 –
Victories:	5 ships sunk for a total of 29,532 GRT 1 military vessel sunk (500 tons)

German submarine U-703 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine deployed during the Second World War against allied shipping in the Arctic Ocean. She was a successful boat, which had a far longer service life than most other U-boats, primarily due to the restricted zone of operations in which she fought. Her main mission during the war was to target the Arctic Convoys which carried supplies to the Soviet Union from Britain. At this she was quite successful in her three years of raiding until her presumed demise in 1944.

U-703 was built at Hamburg in Northern Germany on the North Sea. She was completed in the autumn of 1941, and given to the experienced Kapitänleutnant Heinz Bielfeld to command. He took her on her working-up period in which the boat was tested and the crew trained in the Baltic Sea and around the German held coastlines, before being dispatched to Narvik in Norway for her first war patrol in April 1942.

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-381 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two Garbe, Lahmeyer & Co. RP 137/c double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).

...
Wikipedia