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Mackenzie-class destroyer
The ''Mackenzie''-class destroyer was a class of warship used by the Royal Canadian Navy and Canadian Forces from the 1960s-1990s. Six such ships were envisioned, of which four were completed to this specification. The last two hulls were completed to the post DDH conversion design (which included helicopter hangars); they were designated as the instead. The four ''Mackenzie''-class destroyers spent most of their service in the Pacific Ocean, used primarily in a training role. Their only significant update was the DELEX (destroyer life extension) program, which were completed between 1982 and 1985 and updated their navigational radar and their sonar.〔Gardiner & Chumbley, p.45〕
==Design and description==
The initial design for what became known as the ''Mackenzie'' class was for an enlarged version of the ''St. Laurent'' class. Designed in 1957, they were to be heavier, longer and have engines that were stronger than those installed in the ''St. Laurent''s. They would also have improved radar and sonar installed. Instead, the budget issues instead forced a repeat of the previous . Four ships were ordered in 1957, two more in 1958.〔Milner, p.223-4〕
In 1959, the design of the final two ships of the class was altered to incorporate the changes made to the ''St. Laurent'' class. These two ships then became a separate class, known as the ''Annapolis'' class.〔Milner, p.225〕 The remaining four ''Mackenzie''s were essentially improved ''Restigouche''s, with improved habitability and better pre-wetting, bridge and weatherdeck fittings to better deal with extreme cold.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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