HMCS Calgary is a Halifax-class frigate that has served in the Canadian Forces and Royal Canadian Navy since 1995.Calgary is the sixth vessel in her class and the second vessel to carry the designation HMCS Calgary. She was built as part of the Canadian Patrol Frigate Project.Calgary was laid down on 15 June 1991 by MIL Davie Shipbuilding at Lauzon and launched on 28 August 1992. She was commissioned into the Canadian Forces on 12 May 1995 and carries the hull classification symbol 335.