 The conversion took ten months to complete, followed by sea trials.The sea trials delayed the conversion of the next ship for four years.By 1969, the budget for naval programs had been cut and only four out of the seven ("Terra Nova", "Restigouche", "Gatineau" and "Kootenay") would get upgraded to IRE standards and the remaining three ("Chaudiere", "Columbia", and "St. Croix") were placed in reserve.