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German submarine U-68 (1940)

Coordinates: 33°24′N 18°59′W / 33.400°N 18.983°W / 33.400; -18.983
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For other ships with the same name, see German submarine U-68.
U-505, a typical Type IXC boat
History
Nazi Germany
NameU-68
Ordered7 August 1939
BuilderDeSchiMAG AG Weser, Bremen
Yard number987
Laid down20 April 1940
Launched22 October 1940
Commissioned11 February 1941
FateSunk 10 April 1944 north-west of Madeira, Portugal. 56 dead and 1 survivor[1]
General characteristics
Class and typeType IXC submarine
Displacement
  • 1,120 t (1,100 long tons) surfaced
  • 1,232 t (1,213 long tons) submerged
Length
Beam
  • 6.76 m (22 ft 2 in) o/a
  • 4.40 m (14 ft 5 in) pressure hull
Height9.60 m (31 ft 6 in)
Draught4.70 m (15 ft 5 in)
Installed power
  • 4,400 PS (3,200 kW; 4,300 bhp) (diesels)
  • 1,000 PS (740 kW; 990 shp) (electric)
Propulsion
Speed
  • 18.3 knots (33.9 km/h; 21.1 mph) surfaced
  • 7.3 knots (13.5 km/h; 8.4 mph) submerged
Range
  • 24,880 nmi (46,080 km; 28,630 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 117 nmi (217 km; 135 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth230 m (750 ft)
Complement4 officers, 44 enlisted 48 to 56
Armament
Service record
Part of:
Identification codes: M 00 412
Commanders:
  • K.Kapt. Karl-Freidrich Merten
  • 11 February 1941 – 21 January 1943
  • Oblt.z.S. Albert Lauzemis
  • 21 January – 16 June 1943
  • Oblt.z.S. Ekkehard Scherraus
  • 14 June – July 1943
  • Oblt.z.S. Gerhard Seehausen
  • July – 29 July 1943
  • Oblt.z.S. Albert Lauzemis
  • 30 July 1943 – 10 April 1944
Operations:
  • 10 patrols:
  • 1st patrol:
  • 30 June – 1 August 1941
  • 2nd patrol:
  • 11 September – 25 December 1941
  • 3rd patrol:
  • 11 February – 13 April 1942
  • 4th patrol:
  • 14 May – 10 July 1942
  • 5th patrol:
  • 20 August – 6 December 1942
  • 6th patrol:
  • 3 February – 7 May 1943
  • 7th patrol:
  • a. 12 – 16 June 1943
  • b. 1 – 3 August 1943
  • 8th patrol:
  • 14 – 15 August 1943
  • 9th patrol:
  • 8 September – 23 December 1943
  • 10th patrol:
  • 22 March – 10 April 1944
Victories:
  • 32 merchant ships sunk
    (197,453 GRT)
  • 1 auxiliary warship sunk
    (545 GRT)

German submarine U-68 was a Type IXC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 20 April 1940 at the DeSchiMAG AG Weser yard at Bremen as yard number 987, launched on 22 October and commissioned on 1 January 1941 under the command of Korvettenkapitän Karl-Friedrich Merten as part of 2nd U-boat Flotilla.

U-68 conducted ten combat patrols, sinking 32 merchant ships, for a total of 197,453 gross register tons (GRT); she also sank one auxiliary warship of 545 GRT. She was a member of one wolfpack.

On 10 April 1944, during her tenth patrol, she was sunk northwest of Madeira by US aircraft from the escort carrier Guadalcanal.

Design

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German Type IXC submarines were slightly larger than the original Type IXBs. U-68 had a displacement of 1,120 tonnes (1,100 long tons) when at the surface and 1,232 tonnes (1,213 long tons) while submerged.[2] 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 6.76 m (22 ft 2 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.70 m (15 ft 5 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 metric horsepower (740 kW; 990 shp) 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).[2]

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).[2] 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 13,450 nautical miles (24,910 km; 15,480 mi) at 10 knots (19 km/h; 12 mph). U-68 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) SK C/30 as well as a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of forty-eight.[2]

Service history

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First patrol

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U-68 left Kiel on 30 June 1941 for the Atlantic Ocean via the gap between Iceland and the Faroe Islands. She was unsuccessfully attacked with 24 depth charges by the British corvette Rhododendron west northwest of Cape Finisterre in Spain.[3] She docked at her new base at Lorient, on the French Atlantic coast, on 1 August. She would be based there for the rest of her career.

Second patrol

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Heading for the south Atlantic, the boat came across Silverbelle southwest of the Canary Islands and sank her on 22 September 1941. On 28 September she was involved in an action in Tarrafal Bay, Cape Verde islands, but escaped unscathed. The following month she sank RFA Darkdale while the ship was at anchor off Jamestown, Saint Helena on 22 October. Her third victim, Hazelside, was destroyed on the 28th, 600 nmi (1,100 km; 690 mi) southeast of Saint Helena. U-68 also sank Bradford City west of South West Africa (now Namibia) on 1 November. The U-boat collided with the stricken ship while diving underneath her. The submarine's bow was bent.

Nevertheless, the submarine returned to Lorient on 25 December.

Third patrol

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U-68's third sortie was also conducted off the west coast of Africa. She sank Helenus on 3 March 1942 200 nmi (370 km; 230 mi) south of Freetown in Sierra Leone, followed by Baluchstan on the eighth. The boat's crew were kept busy, sinking Baron Newlands on the 16th and Ile de Batz on the 17th; all the vessels met their end in the vicinity of Liberia.

She also sank Scottish Prince about 180 nmi (330 km; 210 mi) west of Takoradi in Gold Coast[4] and Allende, both on the 17th.

U-68 had turned for home when she sank Muncaster Castle with two torpedoes south southwest of Monrovia.[4] More than ten lifeboats were seen by the Germans; there were 329 survivors.

Fourth patrol

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For her fourth patrol U-68 moved to the Caribbean Sea, leaving Lorient on 14 May 1942. On the night of 5 June she sank MV C.O. Stillman, which at 13,006 GRT was then the world's largest oil tanker.

On the night of 10 June, northeast of the Panama Canal, she torpedoed the 8,581 GRT British freighter Surrey. 5,000 tons of dynamite in the cargo detonated after the ship sank. The shock wave lifted the U-boat out of the water as if she had been hit herself; both diesel engines and the gyrocompass were disabled.[5]

Another victim was Port Montreal. She was sunk with what Merten noted in the boat's war diary as a lucky [torpedo] hit.

In all, U-68 sank seven ships during this patrol before returning to Lorient on 10 July.

Fifth patrol

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The submarine left Lorient on her fifth patrol on 20 August 1942. She would not see her base again until December. At 109 days, this was to be her longest and most successful sally. Heading once more into the South Atlantic, she attacked and sank Trevilley east northeast of Ascension Island on 12 September. The Master and Chief Officer were taken prisoner.

She travelled further south, sinking ships such as Gasterkerk on 8 October and Sarthe on the same date, both in the area of the Cape of Good Hope. She also disposed of Belgian Fighter on the ninth.

Turning for home on 16 October, she sank City of Cairo on 6 November. U-68 returned a month later to Lorient on December 6.

Sixth patrol

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The boat's sixth patrol in the first half of 1943 was again to northern South America. Having sunk two ships, she was attacked by a US Mariner flying boat on 2 April; damage was slight.

Seventh and eighth patrols

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U-68 was attacked by one of four British De Havilland Mosquitos on the western edge of the Bay of Biscay on 14 June 1943. One man was killed, three were wounded

Patrol number eight was relatively uneventful.

Ninth patrol

[edit]

The boat returned to her most successful hunting ground - the South Atlantic. In another mammoth patrol (107 days), she sank four more ships.

One of them, the Norwegian tanker Litiopa, had numerous torpedoes and rounds from the deck gun fired at her, but stubbornly refused to succumb. Having been initially encountered at night on 21 October 1943, it was not until the following day that she sank.

The Litiopa's sole escort was the mine-sweeping trawler HMS Orfasy. She was sunk relatively easily on 21 October before the attack on the tanker.

The other two ships were New Columbia, (sunk southwest of Bingerville, Ivory Coast) on 31 October and the French Fort de Vaux on 30 November. The latter vessel met her end after 'Aphrodite' radar decoys had been used to lure the escort vessels away.

U-68's inbound route took her close to the northwest Spanish coast. She docked at Lorient on 23 December 1943.

Tenth patrol and loss

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The boat left Lorient for the last time on 22 March 1944. On 10 April, she was sunk at position 33°24′N 18°59′W / 33.400°N 18.983°W / 33.400; -18.983, northwest of the Portuguese island of Madeira, by depth charges and rockets from Grumman Avenger and Grumman Wildcat aircraft from the United States escort carrier Guadalcanal.

56 men died; there was one survivor, who was the lookout left top-side when the submarine crash-dived in an attempt to avoid attack.[6]

Wolfpacks

[edit]

U-68 took part in one wolfpack, namely:

  • Eisbär (25 August - 1 September 1942)

Summary of raiding history

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Date Ship Nationality Tonnage[Note 1] Fate[7]
22 September 1941 Silverbelle  United Kingdom 5,302 Sunk
22 October 1941 Darkdale  United Kingdom 8,145 Sunk
28 October 1941 Hazelside  United Kingdom 5,297 Sunk
1 November 1941 Bradford City  United Kingdom 4,953 Sunk
3 March 1942 Helenus  United Kingdom 7,366 Sunk
8 March 1942 Baluchistan  United Kingdom 6,992 Sunk
16 March 1942 Baron Newlands  United Kingdom 3,386 Sunk
17 March 1942 Allende  United Kingdom 5,081 Sunk
17 March 1942 Ile de Batz  United Kingdom 5,755 Sunk
17 March 1942 Scottish Prince  United Kingdom 4,917 Sunk
30 March 1942 Muncaster Castle  United Kingdom 5,853 Sunk
5 June 1942 L.J. Drake  United States 6,693 Sunk
5 June 1942 C.O. Stillman  Panama 13,006 Sunk
10 June 1942 Ardenvohr  United Kingdom 5,025 Sunk
10 June 1942 Port Montreal  United Kingdom 5,882 Sunk
10 June 1942 Surrey  United Kingdom 8,581 Sunk
15 June 1942 Frimaire  Free France 9,242 Sunk
23 June 1942 Arnaga  Panama 2,345 Sunk
12 September 1942 Trevilley  United Kingdom 5,296 Sunk
15 September 1942 Breedijk  Netherlands 6,861 Sunk
8 October 1942 Gaasterkerk  Netherlands 8,679 Sunk
8 October 1942 Koumoundouros  Greece 3,598 Sunk
8 October 1942 Sarthe  United Kingdom 5,271 Sunk
8 October 1942 Swiftsure  United States 8,207 Sunk
9 October 1942 Belgian Fighter  Belgium 5,403 Sunk
9 October 1942 Examelia  United States 4,981 Sunk
6 November 1942 City of Cairo[8]  United Kingdom 8,034 Sunk
13 March 1943 Ceres  Netherlands 2,680 Sunk
13 March 1943 Cities Service Missouri  United States 7,506 Sunk
21 October 1943 HMT Orfasy  Royal Navy 545 Sunk
22 October 1943 Litiopa  Norway 5,356 Sunk
31 October 1943 New Columbia  United Kingdom 6,574 Sunk
30 November 1943 Fort de Vaux  Free France 5,186 Sunk
Total amount of tonnage: 197,998 gross register tons

References

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Notes

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  1. ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations

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  1. ^ Helgason, Guðmundur. "The Type IXC boat U-68". German U-boats of WWII - uboat.net. Retrieved 7 December 2014.
  2. ^ a b c d Gröner 1991, p. 68.
  3. ^ The Times Atlas of the World, 1995, p. 15
  4. ^ a b The Times Atlas of the World, 1995, p. 48
  5. ^ Blair, Clay (1996). Hitler's U-boat War: The Hunters, 1939–1942. Random House. p. not cited. ISBN 0-394-58839-8.
  6. ^ Wise Jr, James (2013). Sole Survivors of the Sea. New York: Naval Institute Press. ISBN 9781612513652.
  7. ^ Helgason, Guðmundur. "Ships hit by U-68". German U-boats of WWII - uboat.net. Retrieved 23 November 2012.
  8. ^ "Record dive rescues $50m wartime silver from ocean floor". BBC News. 15 April 2015. Retrieved 15 April 2015.

Bibliography

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[edit]
  • "U-68". U-boat Archive. Retrieved 4 August 2016.
  • Helgason, Guðmundur. "The Type IXC boat U-68". German U-boats of WWII - uboat.net. Retrieved 7 December 2014.
  • Hofmann, Markus. "U 68". Deutsche U-Boote 1935–1945 - u-boot-archiv.de (in German). Retrieved 7 December 2014.

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