German submarine U-100 (1940)

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For other ships of the same name, see German submarine U-100.
U100.jpg
Career (Nazi Germany)
Name: U-100
Ordered: 15 December 1937
Builder: Germaniawerft, Kiel
Yard number: 594
Laid down: 22 May 1939
Launched: 10 April 1940
Commissioned: 30 May 1940
Fate: Sunk, 17 March 1941 by British warships
General characteristics [1]
Type: Type VIIB submarine
Displacement: 753 tonnes (741 long tons) surfaced
857 t (843 long tons) submerged
Length: 66.6 m (218 ft 6 in) o/a
48.8 m (160 ft 1 in) pressure hull
Beam: 6.2 m (20 ft 4 in) o/a
4.7 m (15 ft 5 in) pressure hull
Draft: 4.74 m (15 ft 7 in)
Propulsion: 2 × supercharged GW, 6-cylinder, 4-stroke F46 diesel engines totalling, 2,800–3,200 bhp (2,100–2,400 kW). Max rpm: 470-490.
2 × AEG GU 460/8-276 double-acting electric motors, totalling 750 shp (560 kW). Max rpm: 295
Speed: 17.9 knots (33.2 km/h; 20.6 mph) surfaced
8 knots (15 km/h; 9.2 mph) submerged
Range: 9,400 nmi (17,400 km; 10,800 mi) at 10 knots (19 km/h; 12 mph) surfaced
90 nmi (170 km; 100 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth: 220 m (720 ft)
Crush depth: 230–250 m (750–820 ft)
Complement: 4 officers, 40–56 enlisted
Armament: 4 × 53.3 cm (21 in) bow torpedo tubes
12 × torpedoes or 26 TMA mines
1 × 8.8 cm (3.5 in) deck gun with 220 rounds
1 × C30 20 mm AA
Service record
Part of: Kriegsmarine:
7th U-boat Flotilla
Commanders: Kptlt. Joachim Schepke
(30 May 1940–17 March 1941)
Operations: Six patrols
1st patrol:
9 August–1 September 1940
2nd patrol:
11–25 September 1940
3rd patrol:
12–23 October 1940
4th patrol:
7 –27 November 1940
5th patrol:
2 December 1940–1 January 1941
6th patrol:
9–17 March 1941
Victories: 25 ships sunk for a total of 135,614 gross register tons (GRT)
Four ships damaged for a total of 17,229 GRT
One ship a total loss of 2,205 GRT

German submarine U-100 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II. She, given her short-lived existence, was one of the most successful and deadly U-Boats to have served in the conflict.[2]

Combat record[edit]

First patrol[edit]

The boat was launched on 10 April 1940, with a crew of 53, under the command of Kapitänleutnant Joachim Schepke. On her first active patrol, U-100 came into contact with two Allied convoys, OA-198 and OA-204. She shadowed both convoys.

Second patrol[edit]

U-100 departed for her second active patrol on 11 September 1940, coming into contact with the Allied convoy HX 72.

Third patrol[edit]

After resupplying, U-100 departed for her third active patrol on 12 October 1940. She came into contact with two Allied convoys, HX-79 and SC-7.

Fourth patrol[edit]

U-100 departed on her fourth patrol on 7 November 1940. On 22 November She came into contact with the Allied convoy SC-11 and began to shadow it.

Fifth patrol[edit]

U-100 left for her fifth active patrol on 2 December 1940, sinking two vessels from Convoy OB 256, then a third solo vessel.

Sixth and final patrol[edit]

U-100 departed on her sixth and what would be her final patrol on 9 March 1941. She approached convoy HX 112 from astern in the pre-dawn hours of 17 March, but was detected at a range of 1,000 meters by the Type 286 radar aboard HMS Vanoc.[3] U-100 was the first U-boat to be so discovered during World War II; she was rammed and sunk by Vanoc while attempting to submerge.[4] Another destroyer, HMS Walker, was also present.[5] Six of the boat's 53 crew-members survived, spending the remainder of the war as POWs. Schepke was not one of them.[1][dead link].

Summary of Raiding Career[edit]

Date Ship Flag Tonnage (GRT) Fate
16 August 1940 Empire Merchant  United Kingdom 4,864 Sunk
25 August 1940 Jamaica Pioneer  United Kingdom 5,471 Sunk
29 August 1940 Dalblair  United Kingdom 4,608 Sunk
29 August 1940 Hartismere  United Kingdom 5,498 Damaged
29 August 1940 Astra II  United Kingdom 2,393 Sunk
29 August 1940 Alida Gorthon  Sweden 2,373 Sunk
29 August 1940 Empire Moose  United Kingdom 6,103 Sunk
21 September 1940 Canonesa  United Kingdom 8,286 Sunk
21 September 1940 Torinia  United Kingdom 10,364 Sunk
21 September 1940 Dalcairn  United Kingdom 4,608 Sunk
22 September 1940 Empire Airman  United Kingdom 6,586 Sunk
22 September 1940 Scholar  United Kingdom 3,940 Sunk
22 September 1940 Frederick S. Fales  United Kingdom 10,525 Sunk
22 September 1940 Simla  Norway 6,031 Sunk
18 October 1940 Shekatika  United Kingdom 5,458 Damaged
18 October 1940 Boekelo  Netherlands 2,118 Damaged
19 October 1940 Blairspey  United Kingdom 4,155 Damaged
20 October 1940 Caprella  United Kingdom 8,230 Sunk
20 October 1940 Sitala  United Kingdom 6,218 Sunk
20 October 1940 Loch Lomond  United Kingdom 5,452 Sunk
23 November 1940 Justitia  United Kingdom 4,562 Sunk
23 November 1940 Bradfyne  United Kingdom 4,740 Sunk
23 November 1940 Ootmarsum  Netherlands 3,628 Sunk
23 November 1940 Bruse  Norway 2,205 Total Loss
23 November 1940 Salonica  Norway 2,694 Sunk
23 November 1940 Leise Maersk  United Kingdom 3,136 Sunk
23 November 1940 Bussum  Netherlands 3,636 Sunk
14 December 1940 Kyleglen  United Kingdom 3,670 Sunk
14 December 1940 Euphorbia  United Kingdom 3,380 Sunk
18 December 1940 Napier Star  United Kingdom 10,116 Sunk
Sunk 137,819
Damaged 17,229
Total 155,048

References[edit]

Notes
  1. ^ Gröner, p. 73-4.
  2. ^ "Type VIIB U-100". ubootwaffe.net. Retrieved 2010-01-08. [dead link]
  3. ^ Rohwer & Hummelchen (1992) p.54
  4. ^ Macintyre, Donald, CAPT RN "Shipborne Radar" United States Naval Institute Proceedings September 1967 pp.78-79
  5. ^ The Type VIIB boat U-100 - 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. 
  • Gröner, Erich (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe 1815-1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4. 
  • Rohwer, J. and Hummelchen, G. (1992). Chronology of the War at Sea 1939-1945. Naval Institute Press. ISBN 1-55750-105-X. 

External links[edit]


Coordinates: 61°04′N 11°30′W / 61.067°N 11.500°W / 61.067; -11.500