In 1917 , '' Margaret '' returned to her patrol route in the Gulf of St. Lawrence , based again at Sydney . '' Margaret '' was alongside at Dockyard Jetty 2 in Halifax Harbour during the Halifax Explosion . She broke her moorings and suffered minor damage , while two of her crew were killed ashore . Commander Walter Hose , the commander of the Canadian Atlantic Patrol , sought to rearm the ship with more capable guns positioned aft , but this never came to pass . In 1918 , the appearance of German U-boats along the east coast of North America led to the creation of coastal convoys . In August , '' Margaret '' was tasked with patrolling east of the Magdalen Islands . In September , '' Margaret '' and '' Canada '' escorted HC convoys from Gaspé , Quebec through the Strait of Belle Isle
Halifax Explosion
Halifax Explosion
CGS Margaret