The British battle fleet, Vol. 2 (of 2) : its inception and growth throughout…
15. It is desirable in the interests of efficiency and co-operation
that arrangements should be made from time to time between the British
Admiralty and the Dominion for the ships of the Dominions to take part
in fleet exercises or for any other joint training considered necessary
under the Senior Naval Officer. While so employed the ships will be
under the command of that officer, who would not, however, interfere
in the internal economy of ships of another service further than is
absolutely necessary.