Hannah Marine Corporation owns and operates the largest fleet of ABS load lined, U.S. Flag, double hulled tank barges on the Great Lakes. The current fleet has a per trip capacity of over 385,000 bbl. These ice strengthened tank vessels, coupled with Hannah's tug fleet, are designed to move heavy oils, asphalt, gasoline, diesel, calcium chloride, caustic and liquid fertilizer, on a year-round basis, throughout the Great Lakes and St. Lawrence Seaway system.