Cadet Summer Training Centre HMCS Acadia is a Royal Canadian Sea Cadets summer training centre in Cornwallis Park, Nova Scotia. The centre takes its name from the ship HMCS Acadia, a hydrographic research ship which was commissioned into the navy in both World War I and World War II and based at the end of its naval career at the Cornwallis base as a training ship. In November 1945, HMCS Acadia was decommissioned from Royal Canadian Navy service and the vessel returned to civilian operations with the Canadian Hydrographic Service as CSS Acadia. The name and unit colours of HMCS Acadia were revived in 1956 by the RCN when a new Royal Canadian Sea Cadets summer training centre was established at the naval base on Cape Breton Island. It was called HMCS Acadia.