German submarine U-754

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History
War ensign of Germany (1938-1945).svg Nazi Germany
NameU-754
Ordered9 October 1939
Builder Kriegsmarinewerft Wilhelmshaven
Yard number137
Laid down8 January 1940
Launched5 July 1941
Commissioned28 August 1941
FateSunk on 31 July 1942
General characteristics
Class and type Type VIIC submarine
Displacement
Length
Beam
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height9.60 m (31 ft 6 in)
Draught4.74 m (15 ft 7 in)
Installed power
  • 2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels)
  • 750 PS (550 kW; 740 shp) (electric)
Propulsion
Speed
  • 17.7 knots (32.8 km/h; 20.4 mph) surfaced
  • 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range
  • 8,500  nmi (15,700  km; 9,800  mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth
  • 230 m (750 ft)
  • Crush depth: 250–295 m (820–968 ft)
Complement4 officers, 40–56 enlisted
Armament
Service record
Part of:
Identification codes: M 46 656
Commanders:
  • Kptlt. Hans Oestermann
  • 28 August 1941 – 31 July 1942
Operations:
  • 3 patrols:
  • 1st patrol:
  • 30 December 1941 – 9 February 1942
  • 2nd patrol:
  • 7 March – 25 April 1942
  • 3rd patrol:
  • 19 June – 31 July 1942
Victories:
  • 13 merchant ships sunk
    (55,659  GRT)
  • 1 merchant ship damaged
    (490  GRT)

German submarine U-754 was a Type VIIC U-boat deployed by Nazi Germany's Kriegsmarine during the Second World War against allied shipping in the Atlantic Ocean. She was a successful but short-lived boat, sinking 13 ships during her career. She was most notorious for her final attack, in which she shelled and sank the small fishing vessel Ebb, and killed a number of its crew with machine-gun fire as they attempted to launch a life raft. She was sunk with all hands by a Royal Canadian Air Force bomber three days later on 31 July 1942.

Contents

U-754 was built in the Kriegsmarinewerft at the main fleet base of Wilhelmshaven in Northern Germany on the North Sea. She was completed on 28 August 1941, and given to the experienced Kapitänleutnant Hans Oestermann to command. Following her work-up period in which the boat was tested and the crew trained, she was despatched on her first patrol.

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-754 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. [1] She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 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 Garbe, Lahmeyer & Co. RP 137/c 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). [1]

The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). [1] When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-754 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 a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty. [1]

Service history

First patrol

U-754 departed Kiel on her first patrol on 30 December 1941, and her operating area was primarily in the mouth of the St Lawrence River, operating against convoys entering or leaving the waterway, or destined for the many ports at the river's mouth, such as Halifax, Nova Scotia or St. John's, Newfoundland. During this patrol, she sank four freighters. The submarine narrowly escaped a bombing attack by a Royal Canadian Air Force Bolingbroke bomber on 23 March which inflicted minor damage. [2] The submarine returned to Brest in France on 2 February to resupply and rearm.

Second patrol

The second patrol left from Brest on 9 March 1942, and after a brief sweep in her previous area of operations, she swung south to take advantage of the Second happy time then occurring off the United States's Eastern Seaboard. During this patrol she sank seven more ships; three of them in one attack on a small coastal convoy, in which she hit several small barges and coastal cargo ships. She sank the tanker British Prudence by torpedo on 23 March. U-754 returned to Brest on 25 April 1942.

Third patrol

Her final patrol was her least successful, in terms of ships sunk, although the tonnage was higher, as she sunk the 12,435 GRT Waiwera in the mid-Atlantic on 29 June, ten days after leaving Brest.

Attack on Ebb

It was nearly a month later, on 28 July, that U-754 scored her final victim, when she controversially shelled the fishing vessel Ebb near Cape Sable Island, Nova Scotia.

Ebb was a motor fishing trawler operating out of Boston for the General Sea Foods Company. The crew of the small 260 GRT vessel felt it was unlikely that they would be troubled by the war, as she was far too small for an effective torpedo shot, and too insignificant to justify the risk of a surface attack by gunfire. On 28 July 1942, however, while fishing off Cape Sable her crew were shocked to see U-754 emerge from the water.

The submarine immediately opened fire without warning on Ebb with her anti-aircraft guns. The ship stopped and made signals that they had surrendered, but the gunfire continued, one gun sweeping through the crowd of crew members attempting to launch the ship's life raft. Five of the seventeen crew were killed and seven more seriously wounded, before Ebb sank after taking over fifty hits. The survivors were discovered and rescued by the W-class destroyer HMS Witherington fourteen hours later. [3]

Had U-754's crew survived the war, it is possible that they would have been charged with war crimes as were the officers of U-852 who also fired on sailors who had abandoned their ship. Similar incidents of gun attacks aimed at crews occurred on the U-247 and U-552. [4]

RCAF attack and sinking

Radio transmissions from U-754 betrayed a pattern to Royal Canadian Navy intelligence, information which was used by Norville Everett Small the commander of RCAF 113 Squadron to deploy patrols from RCAF Station Yarmouth targeting the suspected position of U-754. [5]

On 31 July, a Hudson bomber piloted by Squadron Leader Small himself caught U-754 on the surface south of Yarmouth not far from the scene of the Ebb sinking. The submarine was precisely straddled by a cluster of depth charges as it began to dive. The conning tower of the wounded submarine briefly surfaced to be strafed by the Hudson's machine guns before submerging for the last time.

A trail of large air bubbles was followed by a massive underwater explosion as U-754 went to the bottom with all 43 hands. It marked the first submarine kill of the RCAF's Eastern Air Command. [6]

Wolfpacks

U-754 took part in one wolfpack, namely:

Summary of raiding history

DateShip NameNationalityTonnage
(GRT)		Fate [7]
21 January 1942 Belize Flag of Norway.svg  Norway 2,153Sunk
21 January 1942 William Hansen Flag of Norway.svg  Norway 1,344Sunk
25 January 1942 Mount Kitheron Flag of Greece.svg  Greece 3,876Sunk
26 January 1942 Icarion Flag of Greece.svg  Greece 4,013Sunk
23 March 1942 British Prudence Civil Ensign of the United Kingdom.svg  United Kingdom 8,620Sunk
31 March 1942 Menominee Flag of the United States (1912-1959).svg  United States 441Sunk
31 March 1942 Ontario Flag of the United States (1912-1959).svg  United States 490Damaged
31 March 1942 Barnegat Flag of the United States (1912-1959).svg  United States 914Sunk
31 March 1942 Alleghany Flag of the United States (1912-1959).svg  United States 914Sunk
1 April 1942 Tiger Flag of the United States (1912-1959).svg  United States 5,992Sunk
3 April 1942 Otho Flag of the United States (1912-1959).svg  United States 4,839Sunk
6 April 1942 Kollskeg Flag of Norway.svg  Norway 9,858Sunk
29 June 1942 Waiwera Civil Ensign of the United Kingdom.svg  United Kingdom 12,435Sunk
28 July 1942 Ebb Flag of the United States (1912-1959).svg  United States 260Sunk

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References

  1. 1 2 3 4 Gröner 1991, pp. 43–46.
  2. ↑ The Creation of a National Air Force W.A.B. Douglas, (University of Toronto Press, 1986) p. 480.
  3. ↑ Helgason, Guðmundur. "Ebb". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.
  4. ↑ Bridgland
  5. ↑ "Archived copy" (PDF). Archived from the original (PDF) on 27 August 2004. Retrieved 12 August 2007.{{cite web}}: CS1 maint: archived copy as title (link).
  6. ↑ The Creation of a National Air Force W.A.B. Douglas, (University of Toronto Press, 1986) p. 520 and http://www.rcaf.com/squadrons/1-100series/113squadron.php
  7. ↑ Helgason, Guðmundur. "Ships hit by U-754". German U-boats of WWII - uboat.net. Retrieved 12 February 2014.

Bibliography

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