She trained with the 5th U-boat Flotilla from 1 November 1941 until 30 April 1942 , and was then assigned to the 9th U-boat Flotilla from 1 May 1942 .
She trained with the 9th U-boat Flotilla from 1 November 1941 until 30 April 1942 , and was then assigned to the 5th U-boat Flotilla from 1 May 1942 .