These Patrol Frigates are actually "City Class Frigates", HMCS Halifax was the first one and it seems everyone calls them Halifax Class, one book "SHIPS OF THE CANADIAN NAVAL FORCES 1910-2002" Ken Macpherson & Ron Barrie calls them City Class, Roger M Steed's (CANADIAN WARSHIPS) since 1956, calls them Canadian Patrol Frigates and Halifax Class, to me they are City Class, named after Canadian Cities. Great photo.