|Ordered||14 Oct 1941|
|Laid down||16 Feb 1943||Deutsche Werft AG, Hamburg (werk 391)|
|Launched||2 Oct 1943|
|Commissioned||22 Dec 1943||Oblt. Friedrich-Wilhelm Marienfeld|
|Successes||1 warship sunk, total tonnage 900 tons|
Surrendered at Portsmouth, New Hampshire, USA on 17 May 1945 (Waller & Niestlé, 2010).
Scuttled 5 Feb 1946 off the east coast of Cape Cod, USA by torpedoes from the American submarine USS Sirago.
Attacks on this boat
18 Sep 1944
At 22.53 hours, the boat was attacked by a Leigh Light equipped British Liberator (224 Sqdn RAF/R, pilot FO P.M. Hill) in the Norwegian Sea. Six depth charges were dropped, but most overshoot and only one fell close enough to cause minor damage. U-1228 immediately crash dived after the attack, but the Schnorchel had been damaged and this resulted in a carbon monoxide poisoning of the crew, forcing the boat to abort its patrol. One man died. [Matrosenobergefreiter Matthias Mittler] (Sources: BdU KTB/Norman Franks)
1 recorded attack on this boat.
This boat was fitted with a Schnorchel underwater-breathing apparatus and sailed equipped with it in September 1944 but it was of course installed prior to that date. Read more about the Schnorchel and see list of fitted boats.
Men lost from the boat
18 Sep 1944
After being damaged by a Liberator (Sqdn 224/R) the boat suffered Schnorchel damage which resulted in a CO2 poisoning of its crew. One man died. [Matrosenobergefreiter Matthias Mittler]
Related: For more info on such losses see - Men lost from U-boats -