Queen of the Lakes is an unofficial but widely recognized title bestowed upon vessels on the Great Lakes of the United States and Canada, honoring the largest vessel currently in service on the lakes. A number of vessels, mostly lake freighters, have been known by the title. Since 1981, the title has been held by MV Paul R. Tregurtha, a lake freighter of the 1000-foot category operated by the Interlake Steamship Company. MV Paul R. Tregurtha is 1,013.5 ft (308.9 m) long, and is the longest-running holder of the title.[1]