A towboat is a boat esigned for pushing barges. Towboats are characterized by a square bow with steel knees for pushing and powerful engines. They are most often seen on inland waterways and western rivers where they can push more than 50 large barges lashed together into a tow of varying shapes and sizes. Towboats that travel long distances (linehaul) include living quarters for the crew. Outside of the USA towboats are usually referred to as "push boats" or "pushers".