CGS Acadia was a fisheries patrol vessel of the Canadian Department of Marine and Fisheries from 1885 to 1909. The ship began life as the yacht Yosemite, constructed in the United States in 1880. After being acquired in 1885 by Canada and renamed Acadia, the ship served in the Atlantic fisheries, enforcing fisheries regulations in Canadian waters. The ship was taken out of service in 1909 and sold for scrap and Acadia's registry was closed in 1910.