How the British imperial navies compared

The Royal Navy's scale and training put it first, Australia second, while Canada, India, New Zealand, and South Africa were constrained chiefly by government support, money, or fleet size.

Question

How effective were the British imperial navies compared with one another?

Short answer

The Royal Navy ranked first and Australia second; the others were held back by limited numbers, funding, or government support.

Notes

The ranking separates the quality of sailors from the institutional support behind each service. Canada's personnel could be good, but long periods of limited government commitment reduced the navy's effectiveness. India had capable people and ships but too few vessels, while New Zealand operated with little money and remained closely tied to a Royal Navy squadron; South Africa had still less weight. Australia combined more substantial capabilities with imperial integration and ranks second, while the Royal Navy's enormous scale, training system, and accumulated experience keep it first.