After the First World War broke out in August 1914 , '' Canada '' was transferred to the Royal Canadian Navy on 4 August . The ship then underwent a refit that rearmed her with more powerful weaponry and raised '' Canada '' s forecastle . The ship was commissioned as HMCS '' Canada '' on 25 January 1915 and served on the Atlantic coast as an anti-submarine patrol vessel . In June 1915 , '' Canada '' escorted four H-class submarines from Quebec City to Newfoundland . In July 1915 , '' Canada '' with , escorted two troopships through the Gulf of St. Lawrence . However , both ships needed long refits afterwards and did not return to service until September . By 1917 , '' Canada '' s boilers were worn out and needed replacement . On 6 December 1917 she was one of the ships anchored at HMC Dockyard in Halifax Harbour during the Halifax Explosion . She suffered minor damage and one crew member was seriously injured . In 1918 , '' Canada '' was among the Canadian naval vessels used to escort convoys from Quebec City through the Gulf of St. Lawrence . Following the end of the war , HMCS '' Canada '' was decommissioned in November 1919
Halifax Explosion
Halifax Explosion
HMCS Canada