The original Coast Guard icebreaker Mackinaw busts a path into Ludington harbor for the carferry City of Midland on February 18, 1977, after the Midland became mired in ice just outside the harbor entrance during one of the coldest winters in decades. I scrambled over huge ice mounds in making my way all the way out the breakwater to the Ludington lighthouse to have a close-up vantage from which to make this image. The Mackinaw helped keep Great Lakes shipping lanes open for 62 years before being decommissioned in 2006 when the replacement Mackinaw went into service.