British and Canadian Atlantic convoy forces provide a comparison for the number of escorts available to work together. Canada became the world's third-largest navy in this account through an overwhelming emphasis on convoy warfare. Flower-class and Castle-class corvettes and River-class frigates formed a large escort force. A small cruiser component and discussion of carriers do not alter that emphasis. Japan's much smaller force had fewer opportunities to concentrate several escorts against one submarine.
Notable Point · 22:19-23:04
Canada's escort fleet as a comparison of available numbers
The Canadian example illustrates the scale of escort forces available for Atlantic convoy warfare compared with Japan's limited numbers.