![]() U-100 | |
History | |
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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 HMS Vanoc |
General characteristics | |
Class and type | Type VIIB submarine |
Displacement | |
Length |
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Beam |
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Height | 9.50 m (31 ft 2 in) |
Draught | 4.74 m (15 ft 7 in) |
Installed power |
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Propulsion |
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Speed |
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Range | |
Test depth |
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Complement | 4 officers, 40–56 enlisted |
Sensors and processing systems | Gruppenhorchgerät |
Armament |
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Service record | |
Part of: |
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Identification codes: | M 01 800 |
Commanders: | |
Operations: |
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Victories: |
German submarine U-100 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II.
German Type VIIB submarines were preceded by the shorter Type VIIA submarines. U-100 had a displacement of 753 tonnes (741 long tons) when at the surface and 857 tonnes (843 long tons) while submerged. [2] She had a total length of 66.50 m (218 ft 2 in), a pressure hull length of 48.80 m (160 ft 1 in), a beam of 6.20 m (20 ft 4 in), a height of 9.50 m (31 ft 2 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 BBC GG UB 720/8 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). [2]
The submarine had a maximum surface speed of 17.9 knots (33.2 km/h; 20.6 mph) and a maximum submerged speed of 8 knots (15 km/h; 9.2 mph). [2] When submerged, the boat could operate for 90 nautical miles (170 km; 100 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,700 nautical miles (16,100 km; 10,000 mi) at 10 knots (19 km/h; 12 mph). U-100 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and one 2 cm (0.79 in) anti-aircraft gun. The boat had a complement of between 44 and 60. [2]
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.
U-100 departed for her second active patrol on 11 September 1940, coming into contact with the Allied convoy HX 72. HX 72 lost 11 ships in total, with U-100 accounting for 7 ships of 50,340 GRT. In the attack on this convoy, while other U-boats stood off to the side and fired their torpedoes to little or no success, U-100 penetrated inside the convoy before attacking, a tactic soon adopted by the C-in-C of U-boats, Admiral Karl Donitz.[ citation needed ]
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.
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.
U-100 left for her fifth active patrol on 2 December 1940, sinking two vessels from Convoy OB 256, then a third solo vessel.
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.
Date | Ship | Flag | Tonnage (GRT) | Fate [6] |
---|---|---|---|---|
16 August 1940 | Empire Merchant | ![]() | 4,864 | Sunk |
25 August 1940 | Jamaica Pioneer | ![]() | 5,471 | Sunk |
29 August 1940 | Dalblair | ![]() | 4,608 | Sunk |
29 August 1940 | Hartismere | ![]() | 5,498 | Damaged |
29 August 1940 | Astra II | ![]() | 2,393 | Sunk |
29 August 1940 | Alida Gorthon | ![]() | 2,373 | Sunk |
29 August 1940 | Empire Moose | ![]() | 6,103 | Sunk |
21 September 1940 | Canonesa | ![]() | 8,286 | Sunk |
21 September 1940 | Torinia | ![]() | 10,364 | Sunk |
21 September 1940 | Dalcairn | ![]() | 4,608 | Sunk |
22 September 1940 | Empire Airman | ![]() | 6,586 | Sunk |
22 September 1940 | Scholar | ![]() | 3,940 | Sunk |
22 September 1940 | Frederick S. Fales | ![]() | 10,525 | Sunk |
22 September 1940 | Simla | ![]() | 6,031 | Sunk |
18 October 1940 | Shekatika | ![]() | 5,458 | Damaged |
18 October 1940 | Boekelo | ![]() | 2,118 | Damaged |
19 October 1940 | Blairspey | ![]() | 4,155 | Damaged |
20 October 1940 | Caprella | ![]() | 8,230 | Sunk |
20 October 1940 | Sitala | ![]() | 6,218 | Sunk |
20 October 1940 | Loch Lomond | ![]() | 5,452 | Sunk |
23 November 1940 | Justitia | ![]() | 4,562 | Sunk |
23 November 1940 | Bradfyne | ![]() | 4,740 | Sunk |
23 November 1940 | Ootmarsum | ![]() | 3,628 | Sunk |
23 November 1940 | Bruse | ![]() | 2,205 | Total Loss |
23 November 1940 | Salonica | ![]() | 2,694 | Sunk |
23 November 1940 | Leise Maersk | ![]() | 3,136 | Sunk |
23 November 1940 | Bussum | ![]() | 3,636 | Sunk |
14 December 1940 | Kyleglen | ![]() | 3,670 | Sunk |
14 December 1940 | Euphorbia | ![]() | 3,380 | Sunk |
18 December 1940 | Napier Star | ![]() | 10,116 | Sunk |
Sunk: | 135,614 | |||
Total loss: | 2,205 | |||
Damaged: | 17,229 | |||
Total: | 155,048 |