Editing HMCS Bonaventure (section)

===Construction and acquisition===
[[File:Shipbuilding in Belfast, Northern Ireland, November 1944. A28022.jpg|thumb|HMS ''Powerful'' (right) under construction in Belfast in 1944; {{HMS|Magnificent|R36|6}} is on the adjacent slipway]]
The British government ordered a second hull constructed of what would become the ''Majestic'' class on 16 October 1942 once a dock opened at Harland & Wolff's shipyard in Belfast, Northern Ireland. The aircraft carrier's [[keel]] was laid down on 21 November 1943 with the [[yard number]] 1229 and the British Admiralty chose the name ''Powerful'' for the ship. ''Powerful'' was [[Ceremonial ship launching|launched]] on 27 February 1945. Work was suspended in May 1946 following the end of the Second World War, and the hull was [[Reserve fleet|laid up]] incomplete at Belfast.{{sfn|Hobbs|2013|p=336}}

In 1952, the Royal Canadian Navy was looking to replace their existing aircraft carrier {{HMCS|Magnificent}}.{{sfn|Kealy|Russell|1967|p=99}} On 23 April, the Canadian government authorized the expenditure of $21 million{{efn|equivalent to ${{inflation|CA|21|1953|fmt=c}} million in {{inflation/year|CA}}{{inflation/fn|CA}}}} to acquire ''Powerful''. The Royal Canadian Navy had also been offered a [[Centaur-class aircraft carrier|''Hermes''-class]] aircraft carrier by the United Kingdom but found it too costly and two {{sclass|Essex|aircraft carrier|2}}s on loan from the [[United States Navy]], also considered too costly. The choice of ''Powerful'' was made due to cost considerations as well as financial support for the United Kingdom.{{sfn|Milner|2010|p=210}} Agreement on the purchase of ''Powerful'' was reached on 29 November but was back-dated to 12 July.{{sfn|Kealy|Russell|1967|p=99}} Work on ''Powerful'' resumed, this time to a modernized design incorporating recent carrier operation developments, such as the angled flight deck and steam catapults.{{sfn|Hobbs|2013|p=336}} The design changes cost a further $10 million.{{sfn|Milner|2010|p=210}} Other changes that were incorporated were American radar and armament. Construction was completed on 17 January 1957, and the vessel was [[Ship commissioning|commissioned]] into the Royal Canadian Navy at Belfast as HMCS ''Bonaventure''. The vessel was christened by the wife of the Canadian [[Minister of National Defence (Canada)|Minister of National Defence]], [[Ralph Campney]].{{sfn|Hobbs|2013|p=336}}{{sfn|Kealy|Russell|1967|p=100}}