The Coast Guard Cutter Mackinaw, a 240-foot icebreaker homeported in Cheboygan, Mich., comes ahead and creates a track through the ice for the motor vessel James R. Barker to follow in the vicinity of the Johnson Point Turn in the lower St. Marys River, March 26, 2013. The Mackinaw was assisting the ship by breaking through brash ice that the ship had got stuck in.