H.M.C.S. Chambly in Derry/Londonderry Canadian Corvette H.M.C.S. Chambly made many journeys between St. John's in Canada and Northern Ireland during the Battle of the Atlantic. Previous Next Remembering the Fallen Harry O’Leary Rigger's Mate | R/SR 66035 Rigger's Mate Harry O'Leary served in the Royal Navy Special Reserve at his time of death on 19th October 1945. His grave is in Co. Antrim.