German submarine U-186

History

Nazi Germany
Name:	U-186
Ordered:	15 August 1940
Builder:	DeSchiMAG AG Weser, Bremen
Yard number:	1026
Laid down:	24 July 1941
Launched:	11 March 1941^[1]
Commissioned:	10 July 1942^[1]
Fate:	Sunk by HMS Hesperus, 12 May 1943^[1]
General characteristics
Class & type:	Type IXC/40 submarine
Displacement:	1,144 t (1,126 long tons) surfaced 1,257 t (1,237 long tons) submerged
Length:	76.76 m (251 ft 10 in) o/a 58.75 m (192 ft 9 in) pressure hull
Beam:	6.86 m (22 ft 6 in) o/a 4.44 m (14 ft 7 in) pressure hull
Height:	9.60 m (31 ft 6 in)
Draught:	4.67 m (15 ft 4 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
Range:	13,850 nmi (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph) surfaced 63 nmi (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	230 m (750 ft)
Complement:	4 officers, 44 enlisted
Armament:	6 × torpedo tubes (4 bow, 2 stern) 22 × 53.3 cm (21 in) torpedoes 1 × 10.5 cm (4.1 in)deck gun (180 rounds) 1 × 3.7 cm (1.5 in) AA gun 1 × twin 2 cm FlaK 30 AA guns
Service record^[2]
Part of:	Kriegsmarine 4th U-boat Flotilla (training boat) 10 July – 31 December 1942 10th U-boat Flotilla 1 January – 12 May 1943
Commanders:	K.Kapt. Siegfried Hesemann 10 July 1942 – 12 May 1943
Operations:	Two patrols
Victories:	Three ships sunk, totalling 18,782 GRT

German submarine U-186 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine built for service during World War II. Her keel was laid down on 24 July 1941 by DeSchiMAG AG Weser in Bremen as yard number 1026. She was launched on 11 March 1942 and commissioned on 10 July with Korvettenkapitän Siegfried Hesemann in command.

The U-boat's service began with training as part of the 4th U-boat Flotilla. She then moved to the 10th flotilla on 1 January 1943 for operations. The submarine carried out two patrols and was a member of nine wolfpacks. She sank three ships totalling 18,782 gross register tons (GRT).

She was sunk by a British destroyer in May 1943.

Design

German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-186 had a displacement of 1,144 tonnes (1,126 long tons) when at the surface and 1,257 tonnes (1,237 long tons) while submerged.^[3] The U-boat had a total length of 76.76 m (251 ft 10 in), a pressure hull length of 58.75 m (192 ft 9 in), a beam of 6.86 m (22 ft 6 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.67 m (15 ft 4 in). The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4,400 metric horsepower (3,240 kW; 4,340 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 shaft horsepower (1,010 PS; 750 kW) for use while submerged. She had two shafts and two 1.92 m (6 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).^[3]

The submarine had a maximum surface speed of 18.3 knots (33.9 km/h; 21.1 mph) and a maximum submerged speed of 7.3 knots (13.5 km/h; 8.4 mph).^[3] When submerged, the boat could operate for 63 nautical miles (117 km; 72 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 13,850 nautical miles (25,650 km; 15,940 mi) at 10 knots (19 km/h; 12 mph). U-186 was fitted with six 53.3 cm (21 in) torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.5 cm (4.13 in) SK C/32 naval gun, 180 rounds, and a 3.7 cm (1.5 in) as well as a 2 cm (0.79 in) anti-aircraft gun. The boat had a complement of forty-eight.^[3]

Service history

1st patrol

U-186's first patrol took her from Kiel, across the North Sea and into the Atlantic Ocean through the gap between Iceland and the Faroe Islands. She sank Ocean Vagabond on 11 January 1943 south of Iceland. This ship had already been damaged by U-513 in September 1942. U-186 also sank Hastings and Eulima on 23 February 1943 (part of Convoy ON 166) about 310 nmi (570 km; 360 mi) south of Cape Race (Newfoundland). She arrived at Lorient in occupied France, on 5 March 1943.

2nd patrol and loss

The boat departed Lorient on 17 April 1943. On 12 May she was sunk northwest of the Azores by depth charges dropped by the British destroyer HMS Hesperus. Fifty three men died. There were no survivors.

Wolfpacks

U-186 took part in nine wolfpacks, namely.

Habicht (10–19 January 1943)
Haudegen (19 January - 2 February 1943)
Nordsturm (2–9 February 1943)
Haudegen (9–15 February 1943)
Taifun (15–20 February 1943)
Amsel (22 April - 3 May 1943)
Amsel 4 (3–6 May 1943)
Rhein (7–10 May 1943)
Elbe 2 (10–12 May 1943)

Summary of raiding history

Date	Ship	Nationality	Tonnage	Fate^[4]
11 January 1943	Ocean Vagabond	United Kingdom	7,174	Sunk
23 February 1943	Eulima	United Kingdom	6,204	Sunk
23 February 1943	Hastings	United States	5,401	Sunk

References

1 2 3 Kemp 1999, pp. 115-6.
↑ Helgason, Guðmundur. "The Type IXC/40 boat U-186". German U-boats of WWII - uboat.net. Retrieved 22 July 2012.
1 2 3 4 Gröner 1991, p. 68.
↑ Helgason, Guðmundur. "Ships hit by U-186". German U-boats of WWII - uboat.net.

Bibliography

Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945. Der U-Boot-Krieg (in German) IV (Hamburg, Berlin, Bonn: Mittler). ISBN 3-8132-0514-2.
Edwards, Bernard (1996). Dönitz and the Wolfpacks - The U-boats at War. Cassell Military Classics. pp. 160, 207, 211. ISBN 0-304-35203-9.
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.
Kemp, Paul (1999). U-Boats Destroyed - German Submarine Losses in the World Wars. London: Arms & Armour. ISBN 1-85409-515-3.

External links

Helgason, Guðmundur. "The Type IXC/40 boat U-186". German U-boats of WWII - uboat.net. Retrieved 7 December 2014.
Hofmann, Markus. "U 186". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 30 January 2015.

German Type IXC/40 submarines

U-167 U-168 U-169 U-170 U-183 U-184 U-185 U-186 U-187 U-188 U-189 U-190 U-191 U-192 U-193 U-194 U-525 U-526 U-527 U-528 U-529 U-530 U-531 U-532 U-533 U-534 U-535 U-536 U-537 U-538 U-539 U-540 U-541 U-542 U-543 U-544 U-545 U-546 U-547 U-548 U-549 U-550 U-801 U-802 U-803 U-804 U-805 U-806 U-841 U-842 U-843 U-844 U-845 U-846 U-853 U-854 U-855 U-856 U-857 U-858 U-865 U-866 U-867 U-868 U-869 U-870 U-877 U-878 U-879 U-880 U-881 U-889 U-1221 U-1222 U-1223 U-1224 U-1225 U-1226 U-1227 U-1228 U-1229 U-1230 U-1231 U-1232 U-1233 U-1234 U-1235

Preceded by: Type IXC Followed by: Type IXD

List of U-boats of Germany

Coordinates: 41°54′N 31°49′W / 41.900°N 31.817°W / 41.900; -31.817

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