Great Lakes icebreaker gap threatens U.S. maritime dominance

The 240-foot multi-purpose vessel USCGC Mackinaw’s (WLBB-30) primary mission is to serve as the Great Lakes’ lone heavy icebreaker.
The 240-foot multi-purpose vessel USCGC Mackinaw’s (WLBB-30) primary mission is to serve as the
Subscribe or log in to read the rest of this content.