 After the Caribbean duty she was transferred to Western Local Escort Force for duty between New York City and St. John 's , Newfoundland . Fredericton came close to seeing action when she was assigned to convoy <unk> on 8 March 1943 , but she turned back at St. John 's on 14 March . Two days later the convoy was attacked by a wolfpack of nearly 40 U @-@ boats , which resulted in the sinking of 22 ships . 
