 Following the armistice, HMCS "Acadia" was returned to the Hydrographic Survey of Canada (renamed the Canadian Hydrographic Service in 1928) where she regained her original prefix CGS "Acadia" and resumed hydrographic survey work throughout the inter-war period of the 1920s and 1930s.Lack of survey funds suspended her operation in 1924 and 1925.In 1926 she resumed surveys and became the first Canadian research vessel to be fitted with an echo sounder.