ASDIC and production capacity set the corvette's size limits

Small vessels such as the Kingfisher class offered less scope for ASDIC and the other systems a useful escort needed. A larger ship could carry more equipment, but beyond a certain size yards could no longer build enough of them. Bathurst and Flower designs therefore had both a minimum useful size and an upper limit imposed by production capacity. Australian planners evaluated interwar sloop designs against their own requirements and industrial resources. Shared dependence on maritime trade gave British and Australian requirements much in common, while local support needs justified different designs. British orders for Bathursts, including ships for the Royal Indian Navy, show that the Australian solution still had wider uses.