After a minimal time in port at HMC Dockyard, the three ships set out for a training cruise via the Caribbean Sea to Esquimalt, British Columbia. The cruise masked the secret mission of carrying secret documents from the Admiralty to British consulates throughout Central and North America. While on the cruise, the squadron was ordered to Puntarenas, Costa Rica, where their presence was used to strengthen the Canadian government position in negotiations over oil concessions. "Aurora" returned to Halifax on 30 July 1921 via the same route.