German submarine U-674

German submarine U-674 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 7 April 1942 at the Howaldtswerke yard at Hamburg, launched on 8 May 1943, and commissioned on 15 June 1943 under the command of Oberleutnant zur See Harald Muhs.

Attached to 5th U-boat Flotilla based at Kiel, U-674 completed her training period on 31 January 1944 and was assigned to front-line service.

Service history
While operating against convoy RA.39, U-674 was detected by Swordfish B of 842 Naval Air Squadron embarked on HMS Fencer, an escort carrier, north of Tromsø on 2 May 1944. The aircraft attacked, destroying the U-boat. All 49 crew members perished in the attack.