 CGS "Acadia" was recommissioned into the Royal Canadian Navy in October 1939, once again becoming HMCS "Acadia".She was first used as a training ship for HMCS "Stadacona", a shore establishment in Halifax.From May 1940 to March 1941 she saw active use as a patrol ship off the entrance of Halifax Harbour, providing close escort support for small convoys entering and leaving the port from the harbour limits at the submarine nets off McNabs Island to the "Halifax Ocean Meeting Point".