German submarine U-423

German submarine U-423 was a Type VIIC U-boat of the Nazi German Kriegsmarine during World War II.

She carried out one patrol. She did not sink or damage any ships.

She was sunk by a Norwegian aircraft northwest of the Faroe Islands in June 1944.

Service history
The submarine was laid down on 16 March 1942 at the Danziger Werft (yard) at Danzig (now Gdansk), as 'werk' 124, launched on 7 November and commissioned on 3 March under the command of Oberleutnant Joachim Methner.

She served with the 8th U-boat Flotilla from 3 March 1943 until her loss.

Patrol and loss
The boat's only patrol commenced with her departure from Kiel on 9 June 1944. On the 17th, she was sunk northeast of the Faroe Islands by depth charges dropped from a Norwegian PBY Catalina flying boat of No. 333 Squadron RAF.

Fifty-three men went down with the U-boat; there were no survivors.