HMCS Ontario can refer to several ships: , a sixth-rate warship of the Provincial Marine (of then British North American Province of Quebec) and operated by the Royal Navy in Lake Ontario; sunk 1780 , a cruiser transferred to the Royal Canadian Navy in 1944 and scrapped in 1960 HMCS Ontario, a Royal Canadian Sea Cadet summer training centre in Kingston, Ontario established in 1977 as Cadets Camp Frontenac and now based at CFB Kingston/Royal Military College of Canada HMCS Ontario was a planned nuclear-powered cancelled in 1989 References Government of Canada Ships' Histories - HMCS Ontario See also Ontario (disambiguation) Royal Canadian Navy ship names