The Porte-class gate vessels were a class of boom defence vessel operated by the Royal Canadian Navy (RCN) and Canadian Forces (CF) during the Cold War. The class derived its name from the gates of the French fortifications of Québec and Louisbourg and was designed by the RCN as a replacement for World War I-era Battle class trawlers used to operate anti-submarine booms during World War II. The Porte-class were used primarily as training vessels during the Cold War.
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