German submarine U-321

German submarine U-321 was a Type VIIC/41U-boat of Nazi Germany‘s Kriegsmarine during World War II.

German World War II submarine

History
Nazi Germany
Name U-321
Ordered 14 October 1942
Builder Flender Werke, Lübeck
Yard number 321
Laid down 21 January 1943
Launched 27 November 1943
Commissioned 20 April 1944
Fate Sunk by a Polish aircraft, southwest of Ireland, April 1945[1]
General characteristics
Class and type Type VIIC/41submarine
Displacement
  • 759 tonnes (747 long tons) surfaced
  • 860 t (846 long tons) submerged
Length
Beam
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height 9.60 m (31 ft 6 in)
Draught 4.74 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
  • 250 m (820 ft)
  • Crush depth: 275–325 m (902–1,066 ft)
Complement 4 officers, 40–56 enlisted
Armament
Service record[2][3]
Part of:
Identification codes: M 44 228
Commanders:
  • Kptlt. Ulrich Drews
  • 20 January – August 1944
  • Oblt.z.S. Fritz Berends
  • August 1944 – 2 April 1945
Operations:
  • Two patrols:
  • 1–9 March 1945
  • 15 March – 2 April 1945
Victories: None

She carried out two patrols, but did not sink any ships.

The boat was sunk in April 1945 by a Polish aircraft in the Atlantic Ocean.[1]

. . . German submarine U-321 . . .

German Type VIIC/41 submarines were preceded by the heavier Type VIIC submarines. U-321 had a displacement of 759 tonnes (747 long tons) when at the surface and 860 tonnes (850 long tons) while submerged.[4] 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 superchargeddiesel 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).[4]

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).[4] 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-321 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), one 3.7 cm (1.5 in) Flak M42 and two 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.[4]

. . . German submarine U-321 . . .

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. . . German submarine U-321 . . .