Commonwealth navies learned night fighting from the same instructions

Did Commonwealth navies learn Royal Navy night fighting as well?

Yes. The same fighting instructions circulated across the imperial and Commonwealth naval services.

The fighting instructions circulated across the wider family of Royal navies. Commonwealth services therefore trained from the same doctrinal framework rather than developing entirely separate night-fighting systems. Local ships, exercises, and experience could still differ, but the institutional starting point was shared. This helps explain how British methods appeared in allied crews and formations beyond the Royal Navy itself.