Canadian Navy has traditionally focused on the provision of transatlantic communications, where the leading role belongs among surface ships frigates. For this reason, the ships of this class are constantly being updated and improved. It is characteristic that in Canada during the period from 1951 to 1964. was built 19 frigates types Restigouche and St. Laurent. They had similar tactical and technical elements and differed only armament. Thus, for example, eight units of frigate based on one helicopter and was installed on some PARK ASROC. Overall management of the Navy is quite udovletovoryali these ships, but the physical obsolescence and the impossibility of further upgrades made to replace them with more advanced type frigates Halifax.