Long liners deploy long fishing lines with hundreds or even thousands of baited fishhooks spaced at intervals.
The line is towed for a time and then hauled aboard so fishers can remove fish that have taken the hooks. Long liners tend to be smaller than fishing vessels that use nets-the largest fish for tuna in the Pacific Ocean and measure slightly over 60 m (200 ft) in length. These ships use fishing lines that extend over 100 km (60 mi) behind the ship. Other long liners fish for various species of cod in the North Atlantic