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Iroquois-class destroyer
''Iroquois''-class destroyers, also known as Tribal class,〔 are a class of four helicopter-carrying, guided missile destroyers of the Royal Canadian Navy. Launched in the 1970s, they were originally fitted out for anti-submarine warfare, but a major upgrade programme in the 1990s overhauled them for area-wide anti-aircraft warfare. One was sunk in a live-fire exercise in 2007, two more were decommissioned in 2015 leaving one active ship in the class. The ships are named to honour the First Nations of Canada.
==Design and description==
The call for a new class of destroyers came on 22 December 1964 when then Minister of National Defence Paul Hellyer announced them as part of the government's plan to refit the Royal Canadian Navy.〔Milner, p.247〕 Following the cancellation of the General Purpose Frigate Project, the navy hoped to create and improved version of that design. However, at Hellyer's insistence, the focus for the new ships was to be anti-submarine warfare. The estimated cost for the vessels was initially $35 million each, which was similar to the .〔Milner, p.248〕
It took four years to settle on a final design, partly due to the requirements for space to accommodate a large helicopter, variable depth sonar and the improved habitation standards brought in by the same government.〔Milner, p.258〕 In 1968, contracts were awarded to
Marine Industries Ltd. of Sorel and Davie Shipbuilding of Lauzon.〔Milner, p.259〕
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