Long Lines is a technology in Age of Empires III, available at the Dock once the Colonial Age is reached. It costs 200 wood and 200 coin. To research this technology, Gill Nets must be researched first.

Long Lines increases gather rates for Fishing Boats and other fishing ships (like Caravels and Canoes) by 30%. This stacks with Gill Nets for +45% of normal fishing, and then any Home City Cards the player may have used.

Dock Technologies
Gill Nets | Long Lines | Armor Plating | Carronade | Percussion Lock | Ship's Howitzers