A maximum-effort empire could order about 64 destroyers yearly

How many destroyers could Britain and the wider empire lay down annually at maximum capacity before 1939?

Roughly 64 per year could be laid down across Britain, Australia, Canada, India, and South Africa, with completion taking about two years.

The estimate assigns the largest share to British yards and adds smaller but meaningful contributions from dominion and Indian capacity. Because destroyers take longer than a year to build, the figure describes a sustained production flow rather than 64 finished ships appearing each year immediately.