Black Swan sloops contributed across the submarine kill chain

How many submarines did Black Swan-class sloops help destroy?

Roughly a hundred across the wider kill chain, including about ten percent of U-boat losses and some operations against Japanese submarines.

The estimate credits Black Swan-class sloops with involvement in roughly a hundred submarine kills. Participation somewhere in the kill chain is the criterion, so this is not a tally of submarines sunk by individual sloops acting alone. Around a tenth of U-boat losses is offered as an approximate scale for their contribution. Operations against Japanese and other submarines also enter the estimate, which is not presented as an audited class total.