| Operations information for U-309 |
26.08.1943 - 01.09.1943
First Sailing - active patrol
U-309 left Kiel under the command of Hans-Gert Mahrholz on 26th Aug 1943 and arrived at Bergen on 1st Sep 1943 after six days.
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13.09.1943 - 18.09.1943
Second Sailing - active patrol
On the 13th Sep 1943, U-309 left Bergen under the command of Hans-Gert Mahrholz and after five days arrived at Trondheim on 18th Sep 1943.
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25.09.1943 - 07.11.1943
Third Sailing - active patrol
U-309 departed under Hans-Gert Mahrholz from Trondheim on 25th Sep 1943 and arrived at Brest on 7th Nov 1943 after just over six weeks.
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19.12.1943 - 14.02.1944
Fourth Sailing - active patrol
U-309 left Brest under the command of Hans-Gert Mahrholz on 19th Dec 1943 and after just over eight weeks arrived at Bordeaux on 14th Feb 1944.
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08.04.1944 - 10.04.1944
Fifth Sailing
On the 8th Apr 1944, U-309 left Bordeaux under the command of Hans-Gert Mahrholz and arrived at La Pallice on 10th Apr 1944 after two days.
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20.06.1944 - 25.06.1944
Sixth Sailing - active patrol
U-309 departed under Hans-Gert Mahrholz from La Pallice on 20th Jun 1944 and after five days arrived at Brest on 25th Jun 1944.
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28.06.1944 - 06.07.1944
Seventh Sailing - active patrol
U-309 left Brest under the command of Hans-Gert Mahrholz on 28th Jun 1944 and arrived back at Brest on 6th Jul 1944 after just over one week on patrol.
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12.07.1944 - 03.08.1944
Eighth Sailing - active patrol
On the 12th Jul 1944, U-309 left Brest under the command of Hans-Gert Mahrholz and returned just over three weeks later to Brest on 3rd Aug 1944.
Hans-Gert Mahrholz hit one ship on this patrol.-
On 24th Jul 1944 he fatally damaged the British 7,219 ton Samneva.
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07.08.1944 - 12.08.1944
Ninth Sailing
U-309 departed under Hans-Gert Mahrholz from Brest on 7th Aug 1944 and arrived at La Pallice on 12th Aug 1944 after five days.
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29.08.1944 - 13.10.1944
Tenth Sailing - active patrol
U-309 left La Pallice under the command of Herbert Loeder on 29th Aug 1944 and after six and a half weeks arrived at Stavanger on 13th Oct 1944.
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15.10.1944 - 21.10.1944
Eleventh Sailing - active patrol
On the 15th Oct 1944, U-309 left Stavanger under the command of Herbert Loeder and arrived at Flensburg on 21st Oct 1944 after six days.
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30.01.1945 - 02.02.1945
Twelfth Sailing - active patrol
U-309 departed under Herbert Loeder from Kiel on 30th Jan 1945 and after three days arrived at Horten on 2nd Feb 1945.
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08.02.1945 - 16.02.1945
Thirteenth Sailing - active patrol
U-309 left Horten under the command of Herbert Loeder on 8th Feb 1945. U-309 was lost on 16th Feb 1945.
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