Lumber hooker
Encyclopedia
Lumber hooker is a nautical term for a Great Lakes
Great Lakes
The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth by total surface, coming in second by volume...

 ship designed to carry her own deck load of lumber and to tow one or two barges. The barges were large old schooners stripped of their masts
Mast (sailing)
The mast of a sailing vessel is a tall, vertical, or near vertical, spar, or arrangement of spars, which supports the sails. Large ships have several masts, with the size and configuration depending on the style of ship...

and running gear to carry large cargoes of lumber.
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