 The vessel entered into service with the Department of Transport's Marine Service as CGS "D'Iberville" in May 1953, named for the French explorer Pierre Le Moyne d'Iberville.Upon completion, "D'Iberville" became Canada's first modern icebreaker.Following completion of her sea trials, "D'Iberville" sailed to England as part of Canada's representation at Queen Elizabeth II's coronation review along with warships from the Royal Canadian Navy.