Two historic Great Lakes shipwrecks discovered in Thunder Bay National Marine Sanctuary NOAA maritime archaeologists and partners have located and identified two previously undiscovered historic shipwrecks in Thunder Bay National Marine Sanctuary. The shipwrecks are the wooden steamer Ohio (1873-1894) and the steel-hulled steamer Choctaw (1892-1915). In May 2017, a sanctuary-led expedition used high-resolution [...]