<P> Because of ice, the Lake is closed to shipping from mid-January to late March . Exact dates for the shipping season vary each year, depending on weather conditions that form and break the ice . </P> <P> According to shipwreck historian Frederick Stonehouse, the southern shore of Lake Superior between Grand Marais, Michigan, and Whitefish Point is known as the "Graveyard of the Great Lakes" and more ships have been lost around the Whitefish Point area than any other part of Lake Superior . These shipwrecks are now protected by the Whitefish Point Underwater Preserve . </P> <P> Storms that claimed multiple ships include the Mataafa Storm in 1905 and the Great Lakes Storm of 1913 . </P> <P> Wreckage of SS Cyprus--a 420 - foot (130 m) ore carrier that sank on October 11, 1907, during a Lake Superior storm in 77 fathoms (460 ft or 140 m) of water--was located in August 2007 . All but Charles G. Pitz of Cyprus's 23 crew perished . The ore carrier sank in Lake Superior on her second voyage, while hauling iron ore from Superior, Wisconsin, to Buffalo, New York . Built in Lorain, Ohio, Cyprus was launched August 17, 1907 . </P>

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