to serve as an international memorial to submariners. In 1986, Cobia was incorporated as a part of the Wisconsin Maritime Museum, declared a National Historic Landmark, and placed on the National Register of Historic Places. Cobia is permanently docked at the Manitowoc River's mouth at Lake Michigan, where tours are given daily and overnight stays are available for groups or individuals. Ongoing restoration, maintenance, and preservation efforts keep Cobia'' in remarkably good condition, with many systems operational, including two of the main diesel engines, the radio shack, and the SJ-1 radar, which is believed to be the oldest operating radar set in the world. References External links Wisconsin Maritime Museum USS Cobia-Overnight Stays Gato-class submarines World War II submarines of the United States Cold War submarines of the United States Museum ships in Wisconsin National Historic Landmarks in Wisconsin Ships on the National Register of Historic Places in Wisconsin Ships built in Groton, Connecticut 1943 ships Museums in Manitowoc County, Wisconsin Military and war museums in Wisconsin National Register of Historic Places in Manitowoc County, Wisconsin