What could Canada contribute to the Atlantic battle?

What useful forces could Canada bring to the Atlantic campaign?

Its Tribal-class destroyers and supporting anti-submarine forces would add valuable escort capacity, though Canada had few high-end ships in 1986.

The answer emphasizes practical escort capacity rather than prestige ships. Canada's newer Tribal-class destroyers could contribute useful command and helicopter facilities. Argus maritime patrol aircraft and Sea King helicopters expand the search around a convoy beyond the ships' own sensors. None is presented as a decisive platform by itself, but together they add the surveillance and anti-submarine coverage that a distributed Atlantic defense requires.