U-181
Under Wolfgang Lüth, the second-highest U-boat ace of the war, this U-boat carried out a patrol that lasted 205 days, a record exceeded only by the U-boats that transferred to the Far East. Altogether, sank 27 ships totaling 138,779 tons.

Type: IX D2
Built: AG Weser, Bremen
Keel laid: 15 March 1941
Launched: 30 December 1941
Commissioned: 9 May 1942
Commanders:
KK Wolfgang Lüth, May 1942-October 1943
KzS Kurt Freiwald, November 1943-May 1945
Fate: Undergoing repairs at Singapore when Germany surrendered, U-181 was taken over by the Japanese Navy and became submarine I-501. Surrendered to the British at Singapore 15 August 1945 and scuttled there 16 February 1946.