'Eisenbart' was a U-boat wolfpack operation in the Arctic against the JW.55A, RA.55A and RA.55B convoys on their 'FV' passages to and from northern Russian ports (25 October/23 December 1943).

The wolfpack comprised U-277, U-307, U-314, U-354, U-360, U-387, U-601, U-716 and U-957, and neither lost any of its own number nor sank any ship.