USCGC MACKINAW

• Unique Purpose-Built Design: The original USCGC Mackinaw (WAGB-83) was specifically designed and built during World War II to keep the shipping lanes of the Great Lakes open during harsh winters, delivering vital war materials. • “Queen of the Great Lakes” Nickname: Due to its size and capabilities, Mackinaw earned the nickname “Queen of the Great Lakes,” as it was the largest icebreaker ever built for these waters. • Construction Restrictions: The Mackinaw was constructed in Toledo, Ohio, because wartime restrictions prevented sending a large ship through the St. Lawrence Seaway, which was then too small. • Service Longevity: USCGC Mackinaw (WAGB-83) served from 1944 to 2006, a remarkable 62 years of continuous service on the Great Lakes. • Innovative Icebreaking Features: Mackinaw featured a unique three-propeller system (two stern, one bow) for better maneuverability and icebreaking efficiency. • Transition to Museum Ship: After decommissioning, the original Mackinaw was converted into a museum ship in Mackinaw City, Michigan, preserving her legacy for future generations. • The New Mackinaw: USCGC Mackinaw (WLBB-30) replaced the original in 2006, featuring modern technology, diesel-electric propulsion, and the ability to perform multiple missions beyond icebreaking. • Role in the “Christmas Tree Ship” Tradition: Both Mackinaws have participated in the annual tradition of delivering Christmas trees to Chicago, continuing a legacy dating back to the early 20th century. • First of Its Kind: The original Mackinaw was the only heavy icebreaker built solely for the Great Lakes, making her a one-of-a-kind vessel in the U.S. Coast Guard fleet. • Vital Wartime Role: During WWII, Mackinaw’s icebreaking allowed the uninterrupted flow of iron ore, coal, and other materials critical to the U.S. war effort, directly supporting American industrial and military power.