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| U-1227 | Type IXC/40 |
| Feldpost Number | M 54 328 |
| Construction Yard | Deutsche Werft AG, Hamburg-Finkenwärder |
| Yard Number | 390 |
| Ordered | 14th Oct 1941 |
| Keel laid | 1st Feb 1942 |
| Launched | 18th Sep 1943 |
| Commissioned | 8th Dec 1943 |
| Baubelehrung | 8.KLA, Hamburg | | Training, Flotillas and Duties | | 12.43 - 07.44 | 31.U-Flottille, Hamburg
Ausbildungsboot (under training)
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| 08.44 - 12.44 | 2.U-Flottille, Lorient
Frontboot (operational)
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| 01.45 - 04.45 | 33.U-Flottille, Flensburg
Frontboot (operational)
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| Commanders | | 12.43 - 04.45 | OL Friedrich Altmeier
see also: U-155 |
| Operations information for U-1227 | 31.08.1944 - 02.09.1944
First Sailing
U-1227 left Kiel under the command of Friedrich Altmeier on 31st Aug 1944 and arrived at Horten on 2nd Sep 1944 after two days.
| 05.09.1944 - 06.09.1944
Second Sailing
On the 5th Sep 1944, U-1227 left Horten under the command of Friedrich Altmeier and after one day arrived at Marviken on 6th Sep 1944.
| 07.09.1944 - 10.09.1944
Third Sailing
U-1227 departed under Friedrich Altmeier from Marviken on 7th Sep 1944 and arrived at Bergen on 10th Sep 1944 after three days.
| 14.09.1944 - 26.12.1944
Fourth Sailing - active patrol
U-1227 left Bergen under the command of Friedrich Altmeier on 14th Sep 1944 and returned more than fourteen weeks later to Bergen on 26th Dec 1944.
Friedrich Altmeier hit one ship on this patrol from convoy ONS-33.-
On 4th Oct 1944 he fatally damaged the Canadian 1,370 ton HMCS Chebogue, sailing with convoy ONS-33.
| 27.12.1944 - 29.12.1944
Fifth Sailing
On the 27th Dec 1944, U-1227 left Bergen under the command of Friedrich Altmeier and arrived at Marviken on 29th Dec 1944 after two days.
| 02.01.1945 - 04.01.1945
Sixth Sailing
U-1227 departed under Friedrich Altmeier from Marviken on 2nd Jan 1945 and after two days arrived at Flensburg on 4th Jan 1945.
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