"Maritime disasters are, in fact, a key piece of Lake Michigan history. There are nearly 50 sunken ships between St. Joseph and Ludington alone — and many, many more in the rest of the lake. The first major wreck recorded in Berrien County happened in 1868, when the Hippocampus, a 94-foot vessel loaded with thousands of baskets of produce, went down mysteriously. Though there were 43 passengers and crew, only 17 people survived after clinging to boat remains for more than two days in frigid temperatures.
Years of sunken ships have created a watery playground for scuba diving. The Manitou Passage Underwater Preserve in Lake Michigan offers divers a thrilling look at historic dock ruins and shipwrecks from two centuries, including the Walter L. Frost, a wooden steamer that sank in 1905, and the Fransisco Morazan, a package freighter that sank in 1960 directly on top of the Walter L. Frost."
theres also a book on amazon about sunken ships in the great lakes.