German submarine U-28 (1936)

For other ships with the same name, see German submarine U-28.

U-33, a typical Type VIIA boat
History
Nazi Germany
NameU-28
Ordered1 April 1935
BuilderDeSchiMAG AG Weser, Bremen
Cost4,189,000 ℛ︁ℳ︁
Yard number909
Laid down2 December 1935
Launched14 July 1936
Commissioned12 September 1936
FateDamaged in a collision, 17 March 1944,[1] stricken 4 August 1944
General characteristics
Class and typeType VIIA submarine
Displacement
Length
  • 64.51 m (211 ft 8 in) o/a
  • 45.50 m (149 ft 3 in) pressure hull
Beam
  • 5.85 m (19 ft 2 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height9.50 m (31 ft 2 in)
Draught4.37 m (14 ft 4 in)
Installed power
  • 2,100–2,310 PS (1,540–1,700 kW; 2,070–2,280 bhp) (diesels)
  • 750 PS (550 kW; 740 shp) (electric)
Propulsion
Speed
  • 17 knots (31 km/h; 20 mph) surfaced
  • 8 knots (15 km/h; 9.2 mph) submerged
Range
  • 6,200 nmi (11,500 km; 7,100 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 73–94 nmi (135–174 km; 84–108 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)
Complement4 officers, 40–56 enlisted
Sensors and
processing systems		Gruppenhorchgerät
Armament
Service record[1][2]
Part of:
Identification codes: M 27 436
Commanders:
  • Kptlt. Wilhelm Ambrosius
  • 12 September 1936 – 1 November 1938
  • Kptlt. Hans-Günther Looff
  • 1936 / 37 – 30 September 1937
  • Oblt.z.S. Fritz-Julius Lemp
  • 28 October – November 1938
  • Oblt.z.S. / Kptlt. Günter Kuhnke
  • 28 October 1938 – 16 November 1940
  • Oblt.z.S. Friedrich Guggenberger
  • 16 November 1940 – 11 February 1941
  • Oblt.z.S. Heinrich Ratsch
  • 12 February – 21 June 1941
  • Oblt.z.S. Hermann Eckhardt
  • 22 June 1941 – 20 March 1942
  • Oblt.z.S. Karl-Heinz Marbach
  • 1 July – 30 November 1942
  • Lt.z.S. / Oblt.z.S. Uwe Christiansen
  • 1 December 1942 – July 1943
  • Lt.z.S. / Oblt.z.S. Erich Krempl
  • July – 1 December 1943
  • Oblt.z.S. Dietrich Sachse
  • 2 December 1943 – 17 March 1944
Operations:
  • 6 patrols:
  • 1st patrol:
  • 19 August – 29 September 1939
  • 2nd patrol:
  • 8 November – 18 December 1939
  • 3rd patrol:
  • 18 February – 23 March 1940
  • 4th patrol:
  • 20 May – 6 July 1940
  • 5th patrol:
  • a. 11 August – 17 September 1940
  • b. 4 – 6 Oct 1940
  • 6th patrol:
  • 12 October – 15 November 1940
Victories:
  • 11 merchant ships sunk
    (42,252 GRT)
  • 1 auxiliary warship sunk
    (4,443 GRT)
  • 1 merchant ship total loss
    (9,577 GRT)
  • 2 merchant ships damaged
    (10,067 GRT)

German submarine U-28 was a Type VIIA U-boat of Nazi Germany's Kriegsmarine during World War II.

Her keel was laid down on 2 December 1935, by DeSchiMAG AG Weser of Bremen. She was launched on 14 July 1936, and commissioned into Kriegsmarine on 12 September 1936, with Kapitänleutnant Wilhelm Ambrosius in command. Ambrosius was succeeded by nine other commanding officers over the next eight years.[1]

U-28 conducted seven war patrols between 19 August 1939 and 15 November 1940, all under the command of Kapitänleutnant Günter Kuhnke, sinking 13 ships totaling 56,272 gross register tons (GRT) and damaging two others totaling 10,067 GRT.[1]

After her third patrol, U-28 became a training vessel and was used to bring new U-boat crews up to standard. She was sunk in a training accident on 17 March 1944 and stricken on 4 August 1944.[1]

  1. ^ a b c d e Helgason, Guðmundur. "The Type VIIA boat U-28". German U-boats of WWII - uboat.net. Retrieved 18 December 2009.
  2. ^ Helgason, Guðmundur. "War Patrols by German U-boat U-28". German U-boats of WWII - uboat.net. Retrieved 18 December 2009.