SS Badger is a passenger and vehicle ferry in the United States that has been in service on Lake Michigan since 1953. Currently, the ship shuttles between Ludington, Michigan, and Manitowoc, Wisconsin, a distance of 62 miles (100 km), connecting U.S. Highway 10 (US 10) between those two cities. She is the last coal-fired passenger vessel operating on the Great Lakes, and was designated a National Historic Landmark on January 20, 2016.

Bay Shipbuilding Company (BSC) is a shipyard and dry dock company in Sturgeon Bay, Door County, Wisconsin. As of 2015, Bay Ships was a subsidiary of Fincantieri Marine Group and produces articulated tug and barges, OPA-90 compliant double hull tank ships and offshore support vessels. It also provides repair services to the lake freighter fleet. In the past the shipyard located in Sturgeon Bay has operated under several different names and traces its history back to 1918.