| Operations information for U-23 |
25.08.1939 - 04.09.1939
First Sailing - active patrol
U-23 left Wilhelmshaven under the command of Otto Kretschmer on 25th Aug 1939 for operations in the North Sea and arrived back at Wilhelmshaven one and a half weeks later on 4th Sep 1939.
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09.09.1939 - 21.09.1939
Second Sailing - active patrol
On the 9th Sep 1939, U-23 left Wilhelmshaven under the command of Otto Kretschmer for operations off the Firth of Forth and after more than one week arrived at Kiel on 21st Sep 1939.
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29.09.1939 - 16.10.1939
Third Sailing - active patrol
U-23 departed under Otto Kretschmer from Kiel on 29th Sep 1939 for operations NE of Scotland and arrived back at Kiel on 16th Oct 1939 after two and a half weeks on patrol.
Otto Kretschmer hit one ship on this patrol.-
On 4th Oct 1939 he sank the British 876 ton Glen Farg.
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01.11.1939 - 09.11.1939
Fourth Sailing - active patrol
U-23 left Kiel under the command of Otto Kretschmer on 1st Nov 1939 for operations off Cromarty Firth and returned just over one week later to Kiel on 9th Nov 1939.U-23 laid 9 mines off Cromarty Firth on 4th November 1939.
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05.12.1939 - 15.12.1939
Fifth Sailing - active patrol
On the 5th Dec 1939, U-23 left Kiel under the command of Otto Kretschmer for operations in the North Sea and arrived back at Kiel one and a half weeks later on 15th Dec 1939.
Otto Kretschmer hit one ship on this patrol.-
On 7th Dec 1939 he sank the Danish 2,400 ton Scotia.
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08.01.1940 - 15.01.1940
Sixth Sailing - active patrol
U-23 departed under Otto Kretschmer from Kiel on 8th Jan 1940 for operations NE of the Orkneys and after one week arrived at Wilhelmshaven on 15th Jan 1940.
Otto Kretschmer hit two ships on this patrol.-
On 11th Jan 1940 he sank the Norwegian 1,150 ton Fredville.
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On 12th Jan 1940 he fatally damaged the Danish 10,517 ton Danmark.
You can read more about the Norwegian ship listed for this patrol at www.warsailors.com.
Click the link for more information on Fredville.
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18.01.1940 - 29.01.1940
Seventh Sailing - active patrol
U-23 left Wilhelmshaven under the command of Otto Kretschmer on 18th Jan 1940 for operations N of Scotland and arrived back at Wilhelmshaven on 29th Jan 1940 after one and a half weeks on patrol.
Otto Kretschmer hit one ship on this patrol.-
On 24th Jan 1940 he sank the Norwegian 1,000 ton Bisp.
You can read more about the Norwegian ship listed for this patrol at www.warsailors.com.
Click the link for more information on Bisp.
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09.02.1940 - 28.02.1940
Eighth Sailing - active patrol
On the 9th Feb 1940, U-23 left Wilhelmshaven under the command of Otto Kretschmer for operations E of the Orkneys and after more than two weeks arrived at Kiel on 28th Feb 1940.
Otto Kretschmer hit three ships on this patrol, two of these ships were in convoy: One was from convoy HN-12 and one was from convoy HX-19.
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On 18th Feb 1940 he sank the British 1,375 ton HMS Daring, sailing with convoy HN-12.
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On 19th Feb 1940 he sank the British 5,225 ton Tiberton.
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On 22nd Feb 1940 he fatally damaged the British 4,996 ton Loch Maddy, a member of convoy HX-19.
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09.04.1940 - 03.05.1940
Ninth Sailing - active patrol
U-23 departed under Heinz Beduhn from Kiel on 9th Apr 1940 for operations in the North Sea and arrived back at Kiel three and a half weeks later on 3rd May 1940.On 25th April 1940 KL Beduhn had his attack on HMS York fail twice due to faulty torpedoes.
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27.06.1943 - 19.07.1943
Tenth Sailing - active patrol
U-23 left Konstanza under the command of Rolf-Birger Wahlen on 27th Jun 1943 and returned to Konstanza on 19th Jul 1943 after just over three weeks on patrol.
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10.08.1943 - 09.09.1943
Eleventh Sailing - active patrol
On the 10th Aug 1943, U-23 left Konstanza under the command of Rolf-Birger Wahlen and arrived back at Konstanza on 9th Sep 1943 after over four weeks on patrol.
Rolf-Birger Wahlen hit one ship on this patrol.-
On 24th Aug 1943 he sank the Soviet 35 ton Shkval.
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10.10.1943 - 11.11.1943
Twelfth Sailing - active patrol
U-23 departed under Rolf-Birger Wahlen from Konstanza on 10th Oct 1943 and returned four and a half weeks later to Konstanza on 11th Nov 1943.
Rolf-Birger Wahlen hit two ships on this patrol.-
On 15th Oct 1943 he damaged the Soviet 1,005 ton TSC-486 Sovetskaja Rossija.
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On 23rd Oct 1943 he sank the Soviet 372 ton Tanais.
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14.12.1943 - 07.01.1944
Thirteenth Sailing - active patrol
U-23 left Konstanza under the command of Rolf-Birger Wahlen on 14th Dec 1943 and arrived back at Konstanza three and a half weeks later on 7th Jan 1944.
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30.03.1944 - 24.04.1944
Fourteenth Sailing - active patrol
On the 30th Mar 1944, U-23 left Konstanza under the command of Rolf-Birger Wahlen and returned to Konstanza on 24th Apr 1944 after three and a half weeks on patrol.
Rolf-Birger Wahlen hit one ship on this patrol.-
On 5th Apr 1944 he damaged the Soviet 56 ton SKA-099.
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17.05.1944 - 07.06.1944
Fifteenth Sailing - active patrol
U-23 departed under Rolf-Birger Wahlen from Konstanza on 17th May 1944 and arrived back at Konstanza on 7th Jun 1944 after three weeks on patrol.
Rolf-Birger Wahlen hit one ship on this patrol.-
On 29th May 1944 he sank the Soviet 175 ton Smelyj.
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16.08.1944 - 10.09.1944
Sixteenth Sailing - active patrol
U-23 left Konstanza under the command of Rudolf Arendt on 16th Aug 1944. The boat was scuttled on 10th Sep 1944.
Rudolf Arendt hit one ship on this patrol.-
On 1st Sep 1944 he fatally damaged the 2,686 ton Oituz.
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