CCGS Samuel Risley is a Canadian Coast Guard icebreaker and buoy tender assigned to the Great Lakes area (Central and Arctic Region). Lead ship of her class, the vessel is named after Samuel Risley, the 19th century maritime inspector and first head of Board of Steamship Inspectors for Upper Canada and Ontario. Based in the Great Lakes, CCGS Samuel Risley is responsible for keeping an ice-free passage between Port Colborne, Ontario and Thunder Bay, Ontario.