German submarine U-3 (1935)

For other ships of the same name, see German submarine U-3.

History
U-1, the first Type II boat
Nazi Germany
Name:	U-3
Ordered:	2 February 1935
Builder:	Deutsche Werke, Kiel^[1]
Cost:	1,500,000 Reichsmark
Yard number:	238
Laid down:	11 February 1935
Launched:	19 July 1935
Commissioned:	6 September 1935
Struck:	1 August 1944 at Gotenhafen
Fate:	Stricken, August 1944. Scrapped 1945
Badge:
General characteristics
Class & type:	IIA coastal submarine
Displacement:	254 t (250 long tons) surfaced 303 t (298 long tons) submerged 381 t (375 long tons) total
Length:	40.90 m (134 ft 2 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:	3.83 m (12 ft 7 in)
Installed power:	700 PS (510 kW; 690 shp) (diesels) 360 PS (260 kW; 360 shp) (electric)
Propulsion:	2 × propeller shafts 2 × 0.85 m (2 ft 9 in) three-bladed propellers 2 × diesel engines 2 × double-acting electric motors
Range:	1,050 nmi (1,940 km; 1,210 mi) at 12 knots (22 km/h; 14 mph) surfaced 35 nmi (65 km; 40 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 1 × 2 cm (0.79 in) anti-aircraft gun
Service record
Part of:	Kriegsmarine U-Boat Training Flotilla 21st U-boat Flotilla
Commanders:	Oblt.z.S. Hans Meckel 6 August 1935 - 29 September 1937 Ernst-Günter Heinicke 30 September 1937 - July 1938 Kptlt. Joachim Schepke 29 October 1938 - 2 January 1940 Gerd Schreiber 3 January - 28 July 1940 Kptlt. Helmut Franzke 29 July - 10 November 1940 Kptlt. Otto von Bülow 11 November 1940 - 2 July 1941 Oblt.z.S. Hans-Hartwig Trojer 3 July 1941 - 2 March 1942 Oblt.z.S. Joachim Zander 3 March - 19 September 1942 Oblt.z.S. Herbert Zoller 1 October - 18 May 1943 Oblt.z.S. Ernst Hartmann 19 May 1943 - 9 June 1944 Lt.z.S. Hermann Neumeister 10 June - 16 July 1944
Operations:	Five: 1st patrol: 4–8 September 1939 2nd patrol: 13–24 September 1939 3rd patrol: 27 September - 3 October 1939 4th patrol: 16–29 March 1940 5th patrol: 12–19 April 1940
Victories:	Two ships sunk, total of 2,348 GRT

German submarine U-3 was a Type IIA U-boat laid down at the Deutsche Werke in Kiel on 11 February 1935 as yard number 238. She was commissioned into the Kriegsmarine on 6 August 1936 under the command of Oberleutnant zur See (Oblt.z.S.) Hans Meckel.

U-3 carried out a total of five combat patrols; she sank two ships while under the command of Joachim Schepke. During April 1940, she was part of the fleet that supported the German invasion of Norway, Operation Weserübung.

As the Type II submarines were too small for combat duty in the Atlantic Ocean, she was assigned to the Baltic for training duties with the 21st U-boat Flotilla, a training outfit.

Emblem

U-3 is known to have had three emblems; one was an oak leaf, with an anchor and a knife or dagger. She also shared this emblem with U-29, U-120, U-747, U-1274 and U-1308.^[2]

Design

German Type II submarines were based on the Finnish submarine Vesikko. U-3 had a displacement of 254 tonnes (250 long tons) when at the surface and 303 tonnes (298 long tons) while submerged. Officially, the standard tonnage was 250 long tons (250 t), however.^[3] The U-boat had a total length of 40.90 m (134 ft 2 in), a pressure hull length of 27.80 m (91 ft 2 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 3.83 m (12 ft 7 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 360 metric horsepower (260 kW; 360 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).^[3]

The submarine had a maximum surface speed of 13 knots (24 km/h; 15 mph) and a maximum submerged speed of 6.9 knots (12.8 km/h; 7.9 mph).^[3] When submerged, the boat could operate for 35 nautical miles (65 km; 40 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 1,600 nautical miles (3,000 km; 1,800 mi) at 8 knots (15 km/h; 9.2 mph). U-3 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 25.^[3]

Operational history

1st and 2nd patrols

The boat's first patrol was relatively uneventful.

Her second sortie was toward the British east Anglian coast.

3rd patrol

She sank the Danish ship Vendia and the Swedish vessel Gun for a total of 2,348 gross register tons (GRT) on 30 September 1939.

U-3 closed Vendia and as was common practice in the early days of the war, ordered her to stop after a few warning shots were fired. The ship's fate is disputed. The German submariners said the Danish vessel tried to ram the U-boat. The ship's crew were convinced she swung with the strength of the wind. A torpedo was fired which hit the vessel and sank her.

The Gun was attacked in the Skagerrak 30 nmi (56 km; 35 mi) northwest of Hanstholm. By now wary from the experience with Vendia, the U-boat sent a boarding party to the Swedish ship, but was obliged to dive by the arrival of HMS Thistle. U-3 fired a torpedo at the British submarine, which missed; indeed they were not aware they had been targeted. The German vessel left the area and came across a lifeboat from Gun, telling the Swedes in it to return to their ship as she was still afloat. The German boarding party had left the ship in a lifeboat, but were picked up by the Danish merchant ship Dagmar. U-3 recovered them and put a torpedo into the empty Gun.

4th and 5th patrols

Patrol number four was also quiet, but number five was enlivened by another British submarine, HMS Porpoise, firing six torpedoes 10 nmi (19 km; 12 mi) west of Egersund at the U-boat on 16 April 1940. They were originally thought to have been aimed at U-1, but the attack caused no damage.

Fate

U-3 was stricken on 1 August 1944 in Gotenhafen. She was captured by Great Britain on 3 May 1945 and scrapped that same year.

Summary of raiding history

Date	Name	Nationality	Tonnage (GRT)	Fate^[4]
30 September 1939	Vendia	Denmark	1,150	Sunk
30 September 1939	Gun	Sweden	1,198	Sunk

References

↑ Rössler 1979, p. 99.
↑ Helgason, Guðmundur. "Emblems". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.
1 2 3 4 Gröner 1991, pp. 39–40.
↑ Helgason, Guðmundur. "Ships hit by U-3". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.

Bibliography

Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945 2. Translated by Thomas, Keith; Magowan, Rachel (London: Conway Maritime Press). ISBN 0-85177-593-4.
Rössler, Eberhard (1979). U-Bootbau bis Ende des 1. Weltkrieges, Konstruktionen für das Ausland und die Jahre 1935 - 1945. Die deutschen U-Boote und ihre Werften I (Munich: Bernard & Graefe). ISBN 3-7637-5213-7.

External links

Helgason, Guðmundur. "The Type IIA boat U3". German U-boats of WWII - uboat.net. Retrieved 2006-11-04.
Hofmann, Markus. "U3". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 2006-11-04.
"The Invasion of Norway (Operation Weserübung)". Retrieved 2006-11-04.

German Type II submarines

Type IIA	U-1 U-2 U-3 U-4 U-5 U-6

Type IIB	U-7 U-8 U-9 U-10 U-11 U-12 U-13 U-14 U-15 U-16 U-17 U-18 U-19 U-20 U-21 U-22 U-23 U-24 U-120 U-121

Type IIC	U-56 U-57 U-58 U-59 U-60 U-61 U-62 U-63

Type IID	U-137 U-138 U-139 U-140 U-141 U-142 U-143 U-144 U-145 U-146 U-147 U-148 U-149 U-150 U-151 U-152

List of U-boats of Germany

Coordinates: 57°42′03″N 2°00′12″W / 57.70083°N 2.00333°W / 57.70083; -2.00333

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