U-Boat Operations

U-4	Type IIA
Feldpost Number	M 13 167
Construction Yard	Deutsche Werke AG, Kiel-Gaarden
Yard Number	239
Ordered	2nd Feb 1935
Keel laid	11th Feb 1935
Launched	31st Jul 1935
Commissioned	17th Aug 1935
Baubelehrung	Marinelehr-und Reparaturwerkstatt, Kiel
Training, Flotillas and Duties
08.35 - 06.40	U-Schule Flottille, Neustadt Schulboot (training boat) Frontboot (operational)
07.40 - 07.44	21.U-Flottille, Pillau Schulboot (training boat)
Commanders
17.08.35 - 29.09.37	OL ~ KL Hannes Weingärtner see also: U-10 U-16 U-851
30.09.37 - 28.10.38	OL ~ KL Hans-Wilhelm von Dresky see also: U-33
29.10.38 - 16.01.40	OL ~ KL Harro von Klot-Heydenfeldt see also: U-20 U-102
17.01.40 - 07.06.40	OL Hans-Peter Hinsch see also: U-140 U-569
08.06.40 - 28.07.40	OL Heinz-Otto Schultze see also: U-141 U-432 U-849
29.07.40 - 02.02.41	OL Hans-Jürgen Zetzsche see also: U-20 U-8 U-560 U-591 U-378
03.02.41 - 08.12.41	OL Hinrich Oscar Bernbeck see also: U-461 UD-4 U-638
09.12.41 - 15.06.42	OL Wolfgang Leimkühler
16.06.42 - 23.01.43	LT Friedrich-Wilhelm Marienfeld see also: U-1228
24.01.43 - 31.05.43	LT Joachim Düppe see also: U-2505
01.06.43 - 22.08.43	OL Paul Sander see also: U-38 U-72
23.08.43 - 05.44	LT ~ OL Herbert Mumm see also: U-236
05.44 - 09.07.44	OL Hubert Rieger

Operations information for U-4
04.09.1939 - 14.09.1939 First Sailing - active patrol U-4 left Wilhelmshaven under the command of Harro von Klot-Heydenfeldt on 4th Sep 1939 for operations SW of Norway and arrived back at Wilhelmshaven one and a half weeks later on 14th Sep 1939.
19.09.1939 - 29.09.1939 Second Sailing - active patrol On the 19th Sep 1939, U-4 left Wilhelmshaven under the command of Harro von Klot-Heydenfeldt for operations in the Skagerrak and after one and a half weeks arrived at Kiel on 29th Sep 1939. Harro von Klot-Heydenfeldt hit three ships on this patrol. On 22nd Sep 1939 he sank the Finnish 2,262 ton Martti Ragnar. On 23rd Sep 1939 he sank the Finnish 1,361 ton Walma. On 24th Sep 1939 he sank the Swedish 1,510 ton Gertrud Bratt.
16.03.1940 - 29.03.1940 Third Sailing - active patrol U-4 departed under Hans-Peter Hinsch from Kiel on 16th Mar 1940 for operations S of Norway and arrived at Wilhelmshaven on 29th Mar 1940 after nearly two weeks.
04.04.1940 - 14.04.1940 Fourth Sailing - active patrol U-4 left Wilhelmshaven under the command of Hans-Peter Hinsch on 4th Apr 1940 for operations off Norway and returned one and a half weeks later to Wilhelmshaven on 14th Apr 1940. Hans-Peter Hinsch hit one ship on this patrol. On 10th Apr 1940 he sank the British 1,090 ton HMS Thistle.

Notes for U-4

U-4 was decommissioned at Gotenhafen on 1st August 1944. During 1945 it was used for spare parts before being captured on 29th March 1945 by Soviet forces.

We have 41 crew names for this boat. click here for crew names of U 4
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