Ontario was one of two Royal Navy Swiftsure class cruisers. She was constructed by Harland & Wolff as HMS Minotaur, and was launched 29 July 1943. Transferred to Canada and renamed Ontario upon completion, she commissioned 26 April 1945 and immediately went to the British Pacific Fleet. She arrived in the Pacific too late to see action in WWII, and soon returned to Canada, where she served mainly as a training ship throughout her career. She was decommissioned in 1958 and was soon scrapped. Ontario carried pendant number 53 during WWII, and number 32 postwar.

Correct answers were received from: James T. Flynn, Jr., Dave Shirlaw, Barry Lake, Marty Bollinger, Chris O'Brien, Ron Hillsden, Jerry Proc, Rick Heinbaugh, Art Niemoller, Bill Schleihauf, Mike Baker, Michael Hagerty, Edwin Evans, John Rodriguez Asti, John Dugan, Bob Morrow, Charles O'Dale, Chris Buja, Barry Gerrard, Monty Mills, Monty Mills, Antonio Veiga, Serge Maliar, William Mitchell, Darren Scannell, Joe Esposito, Aleksander Jaworski, Anthony Lovell, Dave Rotthoff, Kelly Jernigan, Warren Cochrane, Masahiko Toshima, John Bradford, Paolo Marsan, Thomas Ruta, Javier Hueso, Bob Harmer, Michael Dreiucker, William F. Fessenden, Pat Barnhouse, Bill Rhodes, Mike Cooper, Randy Leo, James Doiron, Jeff Spencer, Dave Freeman, Bill Ullmann, Don Hanna, Mark Lawden, Joseph Chase, David Briedis, Yves Grangeon, Dave Mimms, Florent Sornat, Ed Lilly, Kent Malo, Jari Aromaa, Ron Barrie, Ed Schweikart, John Hendershot, J Pinkerton, Stan Prichard, Patrick Vera, Robert Doiron, J. Kiel Nielsen, Bob Henneman, Keith Thompson, Sigurd Gjerde, Axel Reif, Masaki Ogasawara, Mr Peter. J. Jones, Jason Britton, Russ Frevele, John Duerkop, Pieter Cornelissen, Lars Eriksson, Scott E. Brauer, Adan Smigielski, Espen Arnestad, Czéh György, Steve Hissem, Steve Langevin, Robert Morrow, Ronald Ehlert, Joe Donahoe, Edgar Dutkowski, Eugenio Orsini, Mick Halcrow, Jim Davis, Paul Silverstone, Ian Smith, Akos Gergely, Michael Doukas, Robert Kennedy, Dwayne Nutting, Wolfgang Hopf, Václav Sellner, J. E. Pflanz, D. Wadsworth, Václav Sellner, Babichev Dmitry, Ville Toivanen, Rich Austin, Serge Nemirovsky, Randall Melton, Ersal Kronflogger, Don Eaton, Tim Butler, Rick Lundin, Bruce Paterson.