Editing HMCS Onondaga (section)

===Submarine Operational Update Program (SOUP)===
By the late 1970s, the ''Oberon''s in Canadian service had become obsolete and were in need of an update. Planning was done in 1978 and the program approved in February 1979.<ref name=ferguson298>Ferguson, p. 298</ref> In an effort to take the subs from anti-submarine warfare training to frontline service, Maritime Command developed a refit program that included new sonars, periscopes, communications and fire-control systems. They also had their armament upgraded with the fitting of torpedo tubes capable of firing the Mk 48 torpedo. This would allow the submarines to be deployed by [[NATO]] in the North Atlantic to monitor Soviet submarines.<ref>Gimblett, p. 179</ref><ref>Milner, p. 273</ref>

The SOUP refits comprised a new US fire control system, a digital Singer Librascope Mark I, and new Sperry passive ranging sonar with the Type 719 short range sonar removed. The new sonar was placed in the upper casing on the pressure hull. New communications and navigational systems were installed.<ref name=ferguson298/> The submarines were fitted with new torpedo tubes for [[Mark 48 torpedo]]es, however the torpedoes themselves were considered a separate procurement program, which was only finalized in 1985.<ref>Ferguson, pp. 298–299</ref>

Between 1980 and 1986, one of the Canadian ''Oberon''s was out of service undergoing the refit. SOUP came in on time and on its budget of [[Canadian dollar|C$]]45 million in 1986.<ref>Ferguson, p. 299</ref><ref>Milner, p. 287</ref> SOUP kept the Canadian ''Oberon''s operating until the end of the 1990s when they were replaced by the British {{sclass|Upholder|submarine|1}}s.<ref>Gimblett, p. 192</ref>