Anti-submarine success is more than sinking U-boats

Which aircraft or ship class destroyed the most submarines in the Second World War?

Swordfish and the Castle and River classes are suggested as candidates, with no firm ranking established. Convoy protection was the escorts' main job.

Swordfish is suggested as a strong candidate among anti-submarine aircraft. Castle-class corvettes and River-class frigates are also tentative candidates for submarine kills relative to their size. The Swordfish patrolled widely, while Beaufighters were concentrated in areas of greater enemy threat. Aircraft-loss totals need separate caution because a missing patrol aircraft could have suffered mechanical failure or bad weather. Getting merchant ships through remained the convoy escorts' central task.