A Type IXB submarine, believed to be U-106, under attack by a Sunderland flying boat

German submarine U-106 was a Type IXB U-boat of the Nazi German Kriegsmarine that operated during World War II. She was laid down on 26 November 1939 at AG Weser in Bremen as 'werk' 969, launched on 17 June 1940 and commissioned on 24 September. She was armed with six torpedo tubes and a 10.5 cm SK C/32 naval gun. U-106 was assigned to the 2nd U-boat Flotilla on 24 September 1940, in which she would serve for nearly three years.

• http://en.wikipedia.org/wiki/German submarine U-106 (1940)