The third vessel in the class, "Des Groseilliers" was ordered in December 1979 as part of the Canadian government's efforts to stimulate shipbuilding in Canada. The ship was constructed by Port Weller Dry Docks at their shipyard in Port Weller, Ontario with the yard number 68 and was launched on 20 February 1982. The vessel was commissioned in August 1982 and completed in October. The ship replaced the aging icebreaker in the Laurentian Region. The vessel is registered in Ottawa, Ontario and homeported at Quebec City, Quebec. During the winter, "Des Groseilliers" is assigned to icebreaking and ship escort operations in the Gulf of St. Lawrence and on the St. Lawrence and Saguenay Rivers and supports icebreaking operations in the Saint Lawrence Seaway and Great Lakes. During the summer the icebreaker sails to the Canadian Arctic to escort commercial vessels, maintain navigation aids in the region, search and rescue, and support scientific missions.