Alder: The 225-foot cutter hails from Duluth, Minn. The Juniper-class seagoing buoy tender was launched in Marinette, Wis., in 2004 and is one of the most advanced vessels afloat, according to the Coast Guard. The ship combines computer and navigation technology with an advanced oil spill recovery system. It is capable of icebreaking, search and rescue, law enforcement, and marine environmental protection.
Katmai Bay: This 140-foot icebreaking tug calls Sault Ste. Marie its homeport. It handles missions in icebreaking, Homeland Security patrol, lighthouse projects, law enforcement and public affairs.
Biscayne Bay: The 140-foot icebreaking tug hails from St. Ignace. It is propelled by twin shaft 2,500-horsepower diesel engines driving two 125-kilowatt generators, which supply power to an electric motor that drives the main propeller shaft. It is capable of speeds of up to 14.7 knots.
Mackinaw: The 240-foot “Mighty Mac” was launched on April 2, 2005, and commissioned the following year to replace the original Mackinaw that now serves as a maritime museum open for public tours in Mackinaw City. The new Mackinaw had a rough beginning when it struck the Grand Haven seawall on Dec. 12, 2005, en route to its homeport of Cheboygan. The vessel was featured in the television series “Modern Marvels.”