Traffic continued to mount on the ferry run. The Government of Ontario, through its Crown corporation, the Ontario Northland Transportation Commission, acquired the Owen Sound Transportation Company in 1974. This development resulted in the S.S. "Norisle" and M.S. "Norgoma" joining M.S. "Normac" in retirement; and a new vessel being commissioned. The M.S. "Chi-Cheemaun"—translating to "Big Canoe" in Ojibwe—was the largest vessel to every operate on the route. At the time of her commissioning, she was one of Canada's newest state-of-the-art ferries, having been designed by British Columbia naval architects and built on Georgian Bay by the ever-reliable local Collingwood Shipyards as one of their last "hulls". Her service continues the story of that of her distinguished and well-loved predecessor ships. OSTC was spun off from ONTC in 2002.