Largest Icebreaker on Great Lakes: USCG Mackinaw Operation Taconite, Sault St. Marie Jan. 2018

USCG Mackinaw preps the Lower St. Mary's River for the passage of ore boats near the end of the shipping season, January 8, 2018.  The cold snap of early 2018 kept the Coast Guard fleet busy with Operation Taconite, a battle to keep the lanes clear for freighters delivering last-minute loads.  The Mackinaw is 240 feet long X 59 feet wide, displacing 3500 tons.  She is powered by twin azipods, developing 9100 shaft hp.

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