| Operations information for U-1231 |
05.10.1944 - 07.10.1944
First Sailing
U-1231 left Kiel under the command of Hermann Lessing on 5th Oct 1944 and arrived at Horten on 7th Oct 1944 after two days.
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11.10.1944 - 12.10.1944
Second Sailing
On the 11th Oct 1944, U-1231 left Horten under the command of Hermann Lessing and after one day arrived at Marviken on 12th Oct 1944.
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15.10.1944 - 17.10.1944
Third Sailing
U-1231 departed under Hermann Lessing from Marviken on 15th Oct 1944 and arrived at Bergen on 17th Oct 1944 after two days.
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18.10.1944 - 31.01.1945
Fourth Sailing - active patrol
U-1231 left Bergen under the command of Hermann Lessing on 18th Oct 1944 and after fifteen weeks arrived at Farsund on 31st Jan 1945.
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01.02.1945 - 05.02.1945
Fifth Sailing
On the 1st Feb 1945, U-1231 left Farsund under the command of Hermann Lessing and arrived at Flensburg on 5th Feb 1945 after four days.
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13.04.1945 - 20.04.1945
Sixth Sailing
U-1231 departed under Helmut Wicke from Kiel on 13th Apr 1945 and after one week arrived at Horten on 20th Apr 1945.
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22.04.1945 - 24.04.1945
Seventh Sailing
U-1231 left Horten under the command of Helmut Wicke on 22nd Apr 1945 and arrived at Kristiansand on 24th Apr 1945 after two days.
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27.04.1945 - 14.05.1945
Eighth Sailing - active patrol
On the 27th Apr 1945, U-1231 left Kristiansand under the command of Helmut Wicke and after two and a half weeks arrived at Loch Foyle, UK on 14th May 1945.
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